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Complete Guide and Reference Manual for UPS and UPD

Chapter Contents¶

Chapter 35: Functions used in Actions
   35.1 Overview of Functions
   35.2 Reversible Functions
   35.3 Function Descriptions
     35.3.1 addAlias
     35.3.2 doDefaults
     35.3.3 Else
     35.3.4 EndIf
     35.3.5 EndUnless
     35.3.6 envAppend
     35.3.7 envPrepend
     35.3.8 envRemove
     35.3.9 envSet
     35.3.10 envSetIfNotSet
     35.3.11 envUnset
     35.3.12 exeAccess
     35.3.13 exeActionOptional
     35.3.14 exeActionRequired
     35.3.15 execute
     35.3.16 fileTest
     35.3.17 If
     35.3.18 pathAppend
     35.3.19 pathPrepend
     35.3.20 pathRemove
     35.3.21 pathSet
     35.3.22 prodDir
     35.3.23 setupEnv
     35.3.24 setupOptional
     35.3.25 setupRequired
     35.3.26 sourceCompileOpt
     35.3.27 sourceCompileReq
     35.3.28 sourceOptCheck
     35.3.29 sourceOptional
     35.3.30 sourceReqCheck
     35.3.31 sourceRequired
     35.3.32 unAlias
     35.3.33 Unless
     35.3.34 unProdDir
     35.3.35 unsetupEnv
     35.3.36 unsetupOptional
     35.3.37 unsetupRequired
     35.3.38 writeCompileScript
   35.4 Functions under Consideration for Future Implementation
   35.5 Examples of Functions within Actions
     35.5.1 A setup Action
     35.5.2 A "declare as current" Action
   35.6 Local Read-Only Variables Available to Functions
     35.6.1 List of Current Read-Only Variables
     35.6.2 Read-Only Variables under Consideration for the Future

Chapter 35: Functions used in Actions¶

There is a set of supported functions that can be used in action stanzas. Actions are described in Chapter 34: Actions and ACTION Keyword Values . In the present chapter we give a general overview of functions, list and describe all the supported functions, provide a couple of examples of functions within actions, and list all the read-only variables available to the supported functions.

35.1 Overview of Functions¶

Table files and UPD configuration files often include actions. An action corresponds to a command, usually a UPS command, and lists functions to perform in addition to the command's internal processes, when the command is executed. The supported functions are listed and described in this chapter. A function has the format:

<function_name>([<argument_1>] [, <argument_2>] ... [<delimiter>])

The default delimiter is the colon ( : ).

For example, the function:

envPrepend(<VARIABLE>, <value>)

prepends the specified value to an existing environment variable, using the default delimiter.

Functions are not case-sensitive; e.g., envPrepend , envprepend , and ENVPREPEND are all acceptable and equivalent. A function is specified in a shell-independent manner, but contains enough information to allow it to be transformed into a sh or csh family command (e.g., sourceRequired() , or execute() ), or to be interpreted directly by UPS (e.g., writeCompileScript() ).

35.2 Reversible Functions¶

In section 34.2.2 "Uncommands" as Actions we discussed commands that have corresponding "uncommands". Usually, when the "uncommand" is run, the desired behavior is to reverse all the functions that were performed when the original command was run. Many of the supported functions are reversible, some are not.

Wherever you plan to default the "uncommand" action (i.e., to specifically not include an ACTION=UNCOMMAND stanza) and you want UPS to exactly reverse the ACTION=COMMAND functions, make sure that you only include reversible functions under ACTION=COMMAND. Reversible functions are identified as such in the descriptions in section 35.3 Function Descriptions .

35.3 Function Descriptions¶

35.3.1 addAlias¶

Description¶

Add an alias (C shell family) or function (Bourne shell family). A %s in the <VALUE> marks where the argument list should go. Reversible (runs unAlias ).

Syntax¶

addAlias(<NAME>, <VALUE>)

Example 1¶

addAlias(askfor, `echo May I have some %s, please\?')

Defines the alias askfor , which when run with an argument like cake , e.g.,:

% askfor cake

produces the response:

May I have some cake, please?

Example 2¶

addAlias(setup,'${UPS_SOURCE} `${UPS_PROD_DIR}/bin/ups setup %s`')

${UPS_SOURCE} is set to " . " or " source " depending on the shell, and %s is presumed to stand for a product name. This defines the alias setup . When issued with a product name, e.g.,

% setup upd

it sources the executable ${UPS_PROD_DIR}/bin/ups with the arguments setup and upd .

35.3.2 doDefaults¶

Description¶

Perform the default functions for the command corresponding to the specified action (only SETUP and UNSETUP have default functions). If no action listed (e.g., doDefaults() ), then the action under which this function occurs is used. Reversible (runs doDefaults ).

Note: If an ACTION corresponding to the given command is included in the file, the command's default functions will be executed only if doDefaults is specified underneath it. If there is no ACTION for the command, and hence no doDefaults function listed, the default functions will be executed when the command is issued.

Syntax¶

doDefaults([<ACTION>])

Example¶

doDefaults([SETUP])

Specifies that the default functions for the setup command will be run when the command is issued. More typically, this is specified in the following manner:

ACTION=SETUP
       doDefaults()

35.3.3 Else¶

Description¶

A conditional, to be used with If and EndIf or with Unless and EndUnless . Else takes no command string. Else is optional, but we recommend including it for clarity it even if no code follows it. See sections 35.3.17 If and 35.3.33 Unless for descriptions of processing. Also see sections 35.3.4 EndIf and 35.3.5 EndUnless .

Syntax¶

Else()

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

35.3.4 EndIf¶

Description¶

Closes a conditional; to be used with If and optionally Else . The EndIf statement must include a command that exactly matches the command in the corresponding If statement. This is because UPS must be able to invert this to get an unsetup action (to unsetup, the order gets inversed and the inverse of the actions are called). Also see sections 35.3.17 If and 35.3.3 Else .

Syntax¶

EndIf(<same command as used in If statement>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

35.3.5 EndUnless¶

Description¶

Closes a conditional; to be used with Unless and optionally Else . The EndUnless statement must include a command that exactly matches the command in the corresponding If statement. This is because UPS must be able to invert this to get an unsetup action (to unsetup, the order gets inversed and the inverse of the actions are called). Also see sections 35.3.33 Unless and 35.3.3 Else .

Syntax¶

EndUnless(<same command as used in Unless statement>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

Unless( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting) 
EndUnless( test -d ${UPS_PROD_DIR}/exciting )

35.3.6 envAppend¶

Description¶

Append <value> to existing environment variable. Reversible (runs envRemove ).

It is better to append than prepend if you just want to provide a value in case one is not there. If you want to override any existing value, you should prepend.

Note: Use the function pathAppend for $PATH.

Syntax¶

envAppend(<VARIABLE>, <value> [, <delimiter>])

Example¶

envAppend(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Appends the value of ${UPS_PROD_DIR}/lib to the variable PYTHONPATH , using the default delimiter.

35.3.7 envPrepend¶

Description¶

Prepend <value> to existing environment variable. Reversible (runs envRemove ).

It is better to prepend than append if you want to override any existing value. If you just want to provide a value in case one is not there, you should append.

Note: Use the function pathPrepend for $PATH.

Syntax¶

envPrepend(<VARIABLE>, <value> [, <delimiter>])

Example¶

envPrepend(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Prepends the value of ${UPS_PROD_DIR}/lib to the variable PYTHONPATH , using the default delimiter.

35.3.8 envRemove¶

Description¶

Remove the string <value> from existing environment variable.

Note: Use the function pathRemove for $PATH.

Syntax¶

envRemove(<VARIABLE>, <value> [, <delimiter>])

Example¶

envRemove(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Removes the value of ${UPS_PROD_DIR}/lib from the variable PYTHONPATH ; assumes the default delimiter.

35.3.9 envSet¶

Description¶

Set a new environment variable. This is particularly useful for representing long strings. Reversible (runs envUnset ).

Note: Use the function pathSet for $PATH.

Syntax¶

envSet(<VARIABLE>, <value>)

Example¶

envSet(UPD_USERCODE_DIR, ${UPS_THIS_DB})

Sets ${UPD_USERCODE_DIR} (the local database used by UPD ) to ${UPS_THIS_DB} (the database in which the product is declared).

35.3.10 envSetIfNotSet¶

Description¶

Set a new environment variable, if not already set. This is particularly useful for representing long strings.

Syntax¶

envSetIfNotSet(<VARIABLE>, <value>)

Example¶

envSetIfNotSet(HOST, `long_hostname`)

If not already set, this sets the variable HOST to a long hostname.

35.3.11 envUnset¶

Description¶

Unset existing environment variable.

Syntax¶

envUnset(<VARIABLE>)

Example¶

envUnset(MYVAR)

Unsets the variable $MYVAR.

35.3.12 exeAccess¶

Description¶

Check for access to specified existing executable through the $PATH. If executable is found continue. If not found, exit with error.

Syntax¶

exeAccess(<executable>)

Example¶

exeAccess(gcc)

Ensures that a version of the product gcc is in your $PATH.

35.3.13 exeActionOptional¶

Description¶

Process the functions associated with the specified action for the same product instance. Do not fail if the action doesn't exist. Reversible.

Syntax¶

exeActionOptional("<newaction>")

Example¶

exeActionOptional("CONFIGURE")

Process the functions in CONFIGURE action. If no CONFIGURE action, processing continues.

35.3.14 exeActionRequired¶

Description¶

Process the functions associated with the specified action for the same product instance. Fail if it doesn't exist. Reversible.

Syntax¶

exeActionRequired("<newaction>")

Example¶

exeActionRequired("CONFIGURE")

Process the functions in CONFIGURE action. If no CONFIGURE action, processing fails.

35.3.15 execute¶

Description¶

Execute a shell-independent command and (optionally) assign the output to an environment variable, <VARIABLE> .

The functions execute , sourceRequired , sourceReqCheck , sourceOptional , and sourceOptCheck each take a required parameter ( UPS_ENV_FLAG ) which indicates whether to define UPS local variables. This parameter can take the following values:

UPS_ENV

define all local UPS environment variables before sourcing (the script or command relies on these being defined)

NO_UPS_ENV

do not define the local UPS environment variables (the script or command doesn't use them)

If the optional third argument, <VARIABLE> , is not specified, then the specified command is executed but the output from that command is not saved. This command does not have to be shell-independent.

Syntax¶

execute("<command>", <UPS_ENV_FLAG>, [, <VARIABLE>])

Example¶

execute("echo Call final installation script for
 ${UPS_PROD_NAME} ${UPS_PROD_VERSION}", NO_UPS_ENV)

(All on one line.) UPS echoes the given text and sources the current script for the product.

35.3.16 fileTest¶

Description¶

Run a shell test on <file> , fail if <test> is not true (see man test ).

Syntax¶

fileTest(<file>, <test> [, <errormessage>])

Example¶

fileTest(/, -w, "You must be root to run this command.")

This tests for write access in the root directory and returns the shown error message if the test fails.

35.3.17 If¶

Description¶

A conditional, to be used with EndIf and optionally with Else , in the order If(<command>)...Else()...Endif(<command>) . We recommend that Else always be included for clarity, even if no code follows it.

If the command in the If statement succeeds, then UPS runs the code following the If statement and preceding any Else and/or EndIf statement.
If the command result is false, then UPS runs the code following the Else statement and preceding the EndIf statement. If there is no Else statement, UPS does nothing.

Also see sections 35.3.4 EndIf and 35.3.3 Else .

A conditional If()...Else()...Endif() structure has no effect on dependencies. It may not work as you expect if you put If()...EndIf() around SetupOptional() and/or SetupRequired() statements. Developers writing table files that use If() statements to conditionally run setup commands must test thoroughly using setup -V , and must read the generated script files.

Syntax¶

If(<command>)

Example¶

Here is a standard example:

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

Here is an example showing behavior with dependencies. If foo depends on bar (i.e., bar appears in foo 's dependency list), then the code:

SetupRequired(foo)
  If( some command that's true )
     SetupRequired(bar)
  Else()
  Endif( some command )

puts nothing inside the If statement in the generated script files, since the SetupRequired(bar) is redundant.

Similarly, if foo depends on bar v2, then:

If( some command )
     SetupRequired(bar v1)
  Else()
     SetupRequired(bar v2)
  Endif( some command )

sets up either bar v1 or nothing , since the second one is redundant. If you want different dependencies, you must use different stanzas in the table file.

35.3.18 pathAppend¶

Description¶

Append <value> to existing $PATH-like environment variable. Reversible (runs pathRemove ).

It is better to append than prepend if you just want to provide a value in case one is not there. If you want to override any existing value, you should prepend.

Syntax¶

pathAppend(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathAppend(PATH, ${UPS_PROD_DIR}/bin)

Appends the value ${UPS_PROD_DIR}/bin to the $PATH variable using the default delimiter.

35.3.19 pathPrepend¶

Description¶

Prepend <value> to existing $PATH-like environment variable. Reversible (runs pathRemove ).

It is better to prepend than append if you want to override any existing value. If you just want to provide a value in case one is not there, you should append.

Syntax¶

pathPrepend(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathPrepend(PATH, ${UPS_PROD_DIR}/bin)

Prepends the value ${UPS_PROD_DIR}/bin to the $PATH variable using the default delimiter.

35.3.20 pathRemove¶

Description¶

Remove the string <value> from existing $PATH-like environment variable. Reversible (runs pathAppend ).

Syntax¶

pathRemove(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathRemove(PATH, ${UPS_PROD_DIR}/bin)

Removes the value ${UPS_PROD_DIR}/bin from the $PATH variable.

35.3.21 pathSet¶

Description¶

Set a $PATH-like environment variable (in csh family, setting a $PATH is different than setting other environment variables). No choice of delimiter offered. Reversible (runs envUnset ).

If this gets set wrong, your $PATH could get deleted. (To recover from this problem, should it occur, simply run setup setpath .)

Syntax¶

pathSet(<VARIABLE>, <value>)

Example¶

pathSet(PATH, /afs/fnal.gov/ups/<prod1/v1_0/SunOS+5/bin: ...)

Sets the $PATH to the value given (sample value truncated after first delimiter for brevity).

35.3.22 prodDir¶

Description¶

Set the $<PRODUCT>_DIR environment variable to the root directory of the product instance. Reversible (runs unProdDir ).

Syntax¶

prodDir()

35.3.23 setupEnv¶

Description¶

Set the $SETUP_<PRODUCT> environment variable so that product can later be unsetup. Reversible (runs unsetupEnv ).

Syntax¶

setupEnv()

35.3.24 setupOptional¶

Description¶

Setup another UPS product as a dependency, do not fail if the product doesn't exist. Reversible (runs unsetupOptional ).

Syntax¶

The syntax is similar to the command setup :

setupOptional("[<options>] <product> [<version>]")

Example¶

setupOptional("perl")

Setup the default instance of the product perl , if available. Do not fail if not found.

35.3.25 setupRequired¶

Description¶

Setup another UPS product as a dependency; fail if product not found. Reversible (runs unsetupRequired ).

Syntax¶

The syntax is similar to the command setup :

setupRequired("[<options>] <product> [<version>]")

Example¶

setupRequired("-j Info")

Setup the default instance of the product Info and no dependencies; fail if not available.

35.3.26 sourceCompileOpt¶

Description¶

If <fileName> exists, then source it and skip remaining functions; otherwise just complete the remaining functions. This is typically used in conjunction with writeCompileScript ; see section 35.3.38 writeCompileScript .

Syntax¶

sourceCompileOpt("<fileName>")

Example¶

sourceCompileOpt("/my/compile/script")

This sources the specified script which was created with writeCompileScript . If script doesn't exist, process continues.

35.3.27 sourceCompileReq¶

Description¶

Source <fileName> and skip all remaining functions; fail if file not found. This is typically used in conjunction with writeCompileScript ; see section 35.3.38 writeCompileScript .

Syntax¶

sourceCompileReq("<fileName>")

Example¶

sourceCompileReq("/my/compile/script")

This sources the specified script which was created with writeCompileScript . If script doesn't exist, process fails.

35.3.28 sourceOptCheck¶

Description¶

Check if specified script exists and if so, source it and check return status for error. If error, abort script and return. Reversible (runs sourceOptCheck on the "un" script, e.g., current and uncurrent ).

The functions execute , sourceOptCheck , sourceOptional , sourceReqCheck , and sourceRequired each take a required parameter ( UPS_ENV_FLAG ) which indicates whether to define UPS local variables. This parameter can take the following values:

UPS_ENV

define all local UPS environment variables before sourcing (the script or command relies on these being defined)

NO_UPS_ENV

do not define the local UPS environment variables (the script or command doesn't use them)

The functions sourceOptCheck , sourceOptional , sourceReqCheck , and sourceRequired each take an optional parameter ( EXIT_FLAG ). This parameter can take the following values:

CONTINUE

after sourcing the script, continue with the next function (the default)

EXIT

after sourcing the script, skip the rest of the functions

Syntax¶

sourceOptCheck(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceOptCheck(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If so, first and check return status for error. If error, abort script and return.

35.3.29 sourceOptional¶

Description¶

Check if <SCRIPT> exists and if so, source it. If script not found, continue. Reversible (runs sourceOptional on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceOptional(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceOptional(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If so, first . If not, continue.

35.3.30 sourceReqCheck¶

Description¶

Source <SCRIPT> and check return status for error; fail if script not found. If error, abort script and return. Reversible (runs sourceOptCheck on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceReqCheck(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceReqCheck(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If not, it will fail. If script exists, first and check return status for error. If error, abort script and return.

35.3.31 sourceRequired¶

Description¶

Source <SCRIPT> ; fail if script not found. Return status not checked. Reversible (runs sourceOptional on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceRequired(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceRequired(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If not, it will fail. If script exists, first .

35.3.32 unAlias¶

Description¶

Remove alias/function of specified name.

Syntax¶

unAlias(<NAME>)

35.3.33 Unless¶

Description¶

A conditional; to be used with EndUnless and optionally with Else , in the order Unless(<command>)...Else()...EndUnless(<command>) . The Unless statement must include a command. If the command result is false, UPS executes statements that follow Unless and that precede either EndUnless or Else , whichever it encounters. If the command result is true and an Else statement exists, UPS executes statements that follow Else and precede EndUnless . If the command is true and no Else statement exists, UPS does nothing.

See also sections 35.3.3 Else and 35.3.5 EndUnless . See section 35.3.17 If for information on dependencies; EndUnless works in an analogous manner.

Syntax¶

Unless(<command>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

Unless( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting) 
EndUnless( test -d ${UPS_PROD_DIR}/exciting )

35.3.34 unProdDir¶

Description¶

Unsets the $<PRODUCT>_DIR environment variable. Reversible (runs prodDir ).

Syntax¶

unProdDir()

35.3.35 unsetupEnv¶

Description¶

Unsets the $SETUP_<PRODUCT> environment variable. Reversible (runs setupEnv ).

Syntax¶

unsetupEnv()

35.3.36 unsetupOptional¶

Description¶

Runs unsetup on a product, does not fail if the product doesn't exist or if it's already unsetup. Reversible (runs setupOptional ).

Syntax¶

The syntax is similar to the command unsetup :

unsetupOptional("[<options>] <product> [<version>]")

For previously setup products, the only options that are recognized include -e , -j , and -v .

Example¶

unsetupOptional("perl")

Unsets the default instance of the product perl , if already setup. Does not fail if product doesn't exist or has already been unsetup.

35.3.37 unsetupRequired¶

Description¶

Runs unsetup on a product; fails if product not found. Reversible (runs setupRequired ).

Syntax¶

The syntax is similar to the command unsetup :

unsetupRequired("<options>] <product> [<version>]")

For previously setup products, the only options that are recognized include -e , -j , and -v .

Example¶

unsetupRequired("perl")

Unsets the default instance of the product perl , if already setup. Fails if product doesn't exist or has already been unsetup.

35.3.38 writeCompileScript¶

Description¶

Write a file of compiled functions for the given ACTION keyword value. It actually writes four files in total: <script>.[c]sh and un<script>.[c]sh .

The function writeCompileScript takes an optional parameter which can be one of the following:

OLD

if fileName exists, move the old one to fileName.old before creating the new one.

DATE

if fileName exists, move the old one to fileName.<datestamp> before creating the new one.

Syntax¶

writeCompileScript("<fileName>", "<ACTION>" [, OLD|DATE])

Example¶

writeCompileScript("/my/compile/script", "SETUP", OLD)

This executes the SETUP action and writes the output of the functions to the specified script, first saving the pre-existing script to /my/compile/script.old . This function knows to ignore the function sourceCompileReq or sourceCompileOpt if it encounters either at the top of the list of SETUP functions. See sections 35.3.26 sourceCompileOpt and 35.3.27 sourceCompileReq .

35.4 Functions under Consideration for Future Implementation¶

copyCatMan

Will copy catman files from source directory specified in table file by CATMAN_SOURCE_DIR to target directory specified in the UPS database configuration file by CATMAN_TARGET_DIR. Reversible (will run uncopyCatMan )

copyHtml

Will copy html files from source directory specified in table file by HTML_SOURCE_DIR to target directory specified in the UPS database configuration file by HTML_TARGET_DIR.

copyInfo

Will copy Info files from source directory specified in table file by INFO_SOURCE_DIR to target directory specified in the UPS database configuration file by INFO_TARGET_DIR.

copyMan

Will copy man files from source directory specified in table file by MAN_SOURCE_DIR to target directory specified in the UPS database configuration file by MAN_TARGET_DIR. Reversible (will run uncopyMan )

copyNews

Will copy news files from source directory specified in table file by NEWS_SOURCE_DIR to target directory specified in the UPS database configuration file by NEWS_TARGET_DIR.

else ()

Will begin an alternative branch

elseif (<condition>)

Will proceed to another condition

endif ()

Will end a conditional branch

if (<condition>)

Will begin a conditional branch

uncopyCatMan

Will remove catman files from target directory specified in the UPS database configuration file by CATMAN_TARGET_DIR. Reversible (will run copyCatMan )

uncopyMan

Will remove man files from target directory specified in the UPS database configuration file by MAN_TARGET_DIR. Reversible (will run copyMan )

35.5 Examples of Functions within Actions¶

35.5.1 A setup Action¶

This first example shows a setup action:

ACTION=SETUP
 prodDir()
 setupEnv()
 pathAppend(PATH, ${UPS_PROD_DIR}/bin)
 setupRequired("crow")
 setupOptional("gypsy")

When the product instance gets setup, UPS does five things in addition to setup 's internal processes:

sets the variable $<PRODUCT>_DIR to the product root directory
sets the variable $SETUP_<PRODUCT> to identify the product instance for unsetup
appends the product's bin directory to the path
sets up the product crow (and aborts the setup if a suitable current instance of crow is not available)
sets up the product gypsy , if found ( setup proceeds whether or not a suitable current instance of gypsy is available).

35.5.2 A "declare as current" Action¶

A second example illustrates steps for UPS to complete when the product instance is declared as current to the database:

ACTION=CURRENT
 execute("echo Call final install script for ${UPS_PROD_NAME} ${UPS_PROD_VERSION}")
 sourceRequired(${UPS_UPS_DIR}/current, UPS_ENV)

UPS echoes the given text and sources the current script for the product.

35.6 Local Read-Only Variables Available to Functions¶

The read-only variables listed below are set by UPS and available for use with the functions described in section 35.3 Function Descriptions . In several functions, the flag UPS_ENV_FLAG controls whether these variables get set (see section 35.3.28 sourceOptCheck ).

These UPS variables do not get exported to the environment, but exist only for the duration of, and in the context of, the processing of an action (actions are described in Chapter 34: Actions and ACTION Keyword Values ). By contrast, the environment variables $<PRODUCT>_DIR and $SETUP_<PRODUCT> (described in section 23.1 setup under Environment Variables Set by Default During setup ), if defined, remain set and available for use as long as the product is setup.

35.6.1 List of Current Read-Only Variables¶

When you use these variables, always enclose them in curly brackets ({}) as shown in the list.

Local Read-Only Variable Local Read-Only Variable	Description of Value Description of Value
${PRODUCTS} ${PRODUCTS}	Generally has the same value as the environment variable $PRODUCTS. The difference is that (read-only) ${PRODUCTS} keeps the value set at the time UPS was invoked, whereas (environment) $PRODUCTS may be reset. Generally has the same value as the environment variable $PRODUCTS. The difference is that (read-only) ${PRODUCTS} keeps the value set at the time UPS was invoked, whereas (environment) $PRODUCTS may be reset. You can reset $PRODUCTS (i.e., using the function envSet (PRODUCTS, "<value>" in the table file) in order to use a new value in the temp file; $PRODUCTS won't get overwritten by ${PRODUCTS} as the temp file executes. See the example that follows this table. You can reset $PRODUCTS (i.e., using the function envSet (PRODUCTS, "<value>" in the table file) in order to use a new value in the temp file; $PRODUCTS won't get overwritten by ${PRODUCTS} as the temp file executes. See the example that follows this table. Note that this is not valid for the other read-only variables in this table; if you try to reset them (as environment variables), your values will get overwritten by the read-only values as the temp file executes. Note that this is not valid for the other read-only variables in this table; if you try to reset them (as environment variables), your values will get overwritten by the read-only values as the temp file executes.
${UPS_REQ_QUALIFIERS} ${UPS_REQ_QUALIFIERS}	Requested product qualifiers (including optional ones), as opposed to the declared product qualifiers. Requested product qualifiers (including optional ones), as opposed to the declared product qualifiers. For example, if you run setup fred -q opt1:opt2 and fred is declared with QUALIFIERS="opt1", then ${UPS_PROD_QUALIFIERS} is "opt1", while ${UPS_REQ_QUALIFIERS} is "opt1:opt2". For example, if you run setup fred -q opt1:opt2 and fred is declared with QUALIFIERS="opt1", then ${UPS_PROD_QUALIFIERS} is "opt1", while ${UPS_REQ_QUALIFIERS} is "opt1:opt2".
${UPS_COMPILE} ${UPS_COMPILE}	Location and file name of a file containing compiled functions (see Chapter 38: Use of Compile Scripts in Table Files ). It has the value of the combined keywords: COMPILE_FILE_DIR/COMPILE_FILE Location and file name of a file containing compiled functions (see Chapter 38: Use of Compile Scripts in Table Files ). It has the value of the combined keywords: COMPILE_FILE_DIR/COMPILE_FILE
${UPS_DIR} ${UPS_DIR}	Entire path to the ups directory of a product. (This is not the same as the environment variable $UPS_DIR that points to the root directory of the UPS product!) Entire path to the ups directory of a product. (This is not the same as the environment variable $UPS_DIR that points to the root directory of the UPS product!)
${UPS_EXTENDED} ${UPS_EXTENDED}	This set to 1 if the -e (extended) option was specified in the setup command (see section 25.2.1 -e ) This set to 1 if the -e (extended) option was specified in the setup command (see section 25.2.1 -e )
${UPS_OPTIONS} ${UPS_OPTIONS}	Option string that was passed with the -O (upper case o ) flag (see Chapter 25: Generic Command Option Descriptions ) Option string that was passed with the -O (upper case o ) flag (see Chapter 25: Generic Command Option Descriptions )
${UPS_ORIGIN} ${UPS_ORIGIN}	This specifies the location of the master source files. This specifies the location of the master source files.
${UPS_OS_FLAVOR} ${UPS_OS_FLAVOR}	Operating system flavor as obtained from ups flavor Operating system flavor as obtained from ups flavor
${UPS_OVERRIDE} ${UPS_OVERRIDE}	This contains the UPS command line option -H <flavor> that would override the default; not set by default. Can be used to "lie" to UPS about the flavor of the machine. May be expanded in the future to contain other UPS command line options. This contains the UPS command line option -H <flavor> that would override the default; not set by default. Can be used to "lie" to UPS about the flavor of the machine. May be expanded in the future to contain other UPS command line options.
${UPS_PROD_DIR} ${UPS_PROD_DIR}	Product instance root directory; same value as the environment variable $<PRODUCT>_DIR Product instance root directory; same value as the environment variable $<PRODUCT>_DIR
${UPS_PROD_FLAVOR} ${UPS_PROD_FLAVOR}	Product flavor chosen during instance matching Product flavor chosen during instance matching
${UPS_PROD_NAME} ${UPS_PROD_NAME}	Product name as declared in the UPS database Product name as declared in the UPS database
${UPS_PROD_QUALIFIERS} ${UPS_PROD_QUALIFIERS}	Product qualifiers chosen during instance matching. Product qualifiers chosen during instance matching. These are the qualifiers declared with the selected instance . They are not necessarily the same set of qualifiers specified on the command line via the -q option (the UPS matching algorithm chooses the "best fit" based on the specified qualifiers; not necessarily an exact match). These are the qualifiers declared with the selected instance . They are not necessarily the same set of qualifiers specified on the command line via the -q option (the UPS matching algorithm chooses the "best fit" based on the specified qualifiers; not necessarily an exact match).
${UPS_PROD_VERSION} ${UPS_PROD_VERSION}	Product version as declared in the UPS database Product version as declared in the UPS database
${UPS_SHELL} ${UPS_SHELL}	Value can be csh or sh. Value can be csh or sh.
${UPS_SOURCE} ${UPS_SOURCE}	Value can be "source" for csh or "." for sh Value can be "source" for csh or "." for sh
${UPS_THIS_DB} ${UPS_THIS_DB}	Database in which this product instance is declared. Database in which this product instance is declared.
${UPS_UPS_DIR} ${UPS_UPS_DIR}	Path to the product instance's ups directory Path to the product instance's ups directory
${UPS_VERBOSE} ${UPS_VERBOSE}	This is set to 1 if the -v (verbose) option was specified (see Chapter 25: Generic Command Option Descriptions ). This is set to 1 if the -v (verbose) option was specified (see Chapter 25: Generic Command Option Descriptions ).

$PRODUCTS vs. ${PRODUCTS}: Resetting $PRODUCTS¶

This example is intended to illustrate the interaction between the read-only variable ${PRODUCTS} and the environment variable $PRODUCTS. There are a couple of potentially confusing points.

Let ${PRODUCTS} be set to /fnal/ups/db . Say in your table file you set $PRODUCTS to /path/to/mydb in the SETUP action, like this:

ACTION=SETUP
    envSet(PRODUCTS, "/path/to/mydb:${PRODUCTS}")

Now ${PRODUCTS} and $PRODUCTS are different. The following execute functions show the difference in the values. The function:

execute("echo $PRODUCTS", NO_UPS_ENV)

would produce:

/path/to/mydb:/fnal/ups/db

whereas the same function using ${PRODUCTS}, e.g.,

execute("echo ${PRODUCTS}", NO_UPS_ENV)

would produce only:

/fnal/ups/db

$PRODUCTS vs. ${PRODUCTS}: Effects on setup and ups depend¶

Another issue is the setup... functions. Say you have a product fred v1_0 declared in /path/to/mydb (the database not included in ${PRODUCTS}). If you include a setupRequired or setupOptional function later in the SETUP action, e.g.,:

ACTION=SETUP
    envSet(PRODUCTS, "/path/to/mydb:${PRODUCTS}")
    setupRequired(fred v1_0)

the setup will fail because these functions only reference the read-only variable ${PRODUCTS}, which in this case doesn't include your product. You can get around this by using the execute function to set the product up:

execute ("setup fred v1_0", NO_UPS_ENV)

This function uses the environment variable $PRODUCTS.

Remember though, when you run a ups depend on a product, only products identified in setupRequired or setupOptional functions get listed. You would not see fred v1_0 listed in the ups depend output for the main product in our example.

35.6.2 Read-Only Variables under Consideration for the Future¶

We plan to make the keyword values, listed in section 28.4 List of Supported Keywords , available as read-only variables available to functions. The read-only variable corresponding to a keyword will typically include "UPS_" prepended to it. E.g., the read-only variable corresponding to the keyword DECLARED will be ${UPS_DECLARED}. Several of these are already implemented in this way, e.g., ${UPS_PROD_DIR} corresponds to the keyword PROD_DIR.

Last revised on May 2014

Complete Guide and Reference Manual for UPS and UPD

Chapter Contents¶

Chapter 35: Functions used in Actions¶

35.1 Overview of Functions¶

<function_name>([<argument_1>] [, <argument_2>] ... [<delimiter>])

The default delimiter is the colon ( : ).

For example, the function:

envPrepend(<VARIABLE>, <value>)

prepends the specified value to an existing environment variable, using the default delimiter.

35.2 Reversible Functions¶

35.3 Function Descriptions¶

35.3.1 addAlias¶

Description¶

Add an alias (C shell family) or function (Bourne shell family). A %s in the <VALUE> marks where the argument list should go. Reversible (runs unAlias ).

Syntax¶

addAlias(<NAME>, <VALUE>)

Example 1¶

addAlias(askfor, `echo May I have some %s, please\?')

Defines the alias askfor , which when run with an argument like cake , e.g.,:

% askfor cake

produces the response:

May I have some cake, please?

Example 2¶

addAlias(setup,'${UPS_SOURCE} `${UPS_PROD_DIR}/bin/ups setup %s`')

${UPS_SOURCE} is set to " . " or " source " depending on the shell, and %s is presumed to stand for a product name. This defines the alias setup . When issued with a product name, e.g.,

% setup upd

it sources the executable ${UPS_PROD_DIR}/bin/ups with the arguments setup and upd .

35.3.2 doDefaults¶

Description¶

Syntax¶

doDefaults([<ACTION>])

Example¶

doDefaults([SETUP])

Specifies that the default functions for the setup command will be run when the command is issued. More typically, this is specified in the following manner:

ACTION=SETUP
       doDefaults()

35.3.3 Else¶

Description¶

Syntax¶

Else()

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

35.3.4 EndIf¶

Description¶

Syntax¶

EndIf(<same command as used in If statement>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

35.3.5 EndUnless¶

Description¶

Syntax¶

EndUnless(<same command as used in Unless statement>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

Unless( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting) 
EndUnless( test -d ${UPS_PROD_DIR}/exciting )

35.3.6 envAppend¶

Description¶

Append <value> to existing environment variable. Reversible (runs envRemove ).

It is better to append than prepend if you just want to provide a value in case one is not there. If you want to override any existing value, you should prepend.

Note: Use the function pathAppend for $PATH.

Syntax¶

envAppend(<VARIABLE>, <value> [, <delimiter>])

Example¶

envAppend(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Appends the value of ${UPS_PROD_DIR}/lib to the variable PYTHONPATH , using the default delimiter.

35.3.7 envPrepend¶

Description¶

Prepend <value> to existing environment variable. Reversible (runs envRemove ).

It is better to prepend than append if you want to override any existing value. If you just want to provide a value in case one is not there, you should append.

Note: Use the function pathPrepend for $PATH.

Syntax¶

envPrepend(<VARIABLE>, <value> [, <delimiter>])

Example¶

envPrepend(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Prepends the value of ${UPS_PROD_DIR}/lib to the variable PYTHONPATH , using the default delimiter.

35.3.8 envRemove¶

Description¶

Remove the string <value> from existing environment variable.

Note: Use the function pathRemove for $PATH.

Syntax¶

envRemove(<VARIABLE>, <value> [, <delimiter>])

Example¶

envRemove(PYTHONPATH, ${UPS_PROD_DIR}/lib)

Removes the value of ${UPS_PROD_DIR}/lib from the variable PYTHONPATH ; assumes the default delimiter.

35.3.9 envSet¶

Description¶

Set a new environment variable. This is particularly useful for representing long strings. Reversible (runs envUnset ).

Note: Use the function pathSet for $PATH.

Syntax¶

envSet(<VARIABLE>, <value>)

Example¶

envSet(UPD_USERCODE_DIR, ${UPS_THIS_DB})

Sets ${UPD_USERCODE_DIR} (the local database used by UPD ) to ${UPS_THIS_DB} (the database in which the product is declared).

35.3.10 envSetIfNotSet¶

Description¶

Set a new environment variable, if not already set. This is particularly useful for representing long strings.

Syntax¶

envSetIfNotSet(<VARIABLE>, <value>)

Example¶

envSetIfNotSet(HOST, `long_hostname`)

If not already set, this sets the variable HOST to a long hostname.

35.3.11 envUnset¶

Description¶

Unset existing environment variable.

Syntax¶

envUnset(<VARIABLE>)

Example¶

envUnset(MYVAR)

Unsets the variable $MYVAR.

35.3.12 exeAccess¶

Description¶

Check for access to specified existing executable through the $PATH. If executable is found continue. If not found, exit with error.

Syntax¶

exeAccess(<executable>)

Example¶

exeAccess(gcc)

Ensures that a version of the product gcc is in your $PATH.

35.3.13 exeActionOptional¶

Description¶

Process the functions associated with the specified action for the same product instance. Do not fail if the action doesn't exist. Reversible.

Syntax¶

exeActionOptional("<newaction>")

Example¶

exeActionOptional("CONFIGURE")

Process the functions in CONFIGURE action. If no CONFIGURE action, processing continues.

35.3.14 exeActionRequired¶

Description¶

Process the functions associated with the specified action for the same product instance. Fail if it doesn't exist. Reversible.

Syntax¶

exeActionRequired("<newaction>")

Example¶

exeActionRequired("CONFIGURE")

Process the functions in CONFIGURE action. If no CONFIGURE action, processing fails.

35.3.15 execute¶

Description¶

Execute a shell-independent command and (optionally) assign the output to an environment variable, <VARIABLE> .

UPS_ENV

define all local UPS environment variables before sourcing (the script or command relies on these being defined)

NO_UPS_ENV

do not define the local UPS environment variables (the script or command doesn't use them)

Syntax¶

execute("<command>", <UPS_ENV_FLAG>, [, <VARIABLE>])

Example¶

execute("echo Call final installation script for
 ${UPS_PROD_NAME} ${UPS_PROD_VERSION}", NO_UPS_ENV)

(All on one line.) UPS echoes the given text and sources the current script for the product.

35.3.16 fileTest¶

Description¶

Run a shell test on <file> , fail if <test> is not true (see man test ).

Syntax¶

fileTest(<file>, <test> [, <errormessage>])

Example¶

fileTest(/, -w, "You must be root to run this command.")

This tests for write access in the root directory and returns the shown error message if the test fails.

35.3.17 If¶

Description¶

If the command in the If statement succeeds, then UPS runs the code following the If statement and preceding any Else and/or EndIf statement.
If the command result is false, then UPS runs the code following the Else statement and preceding the EndIf statement. If there is no Else statement, UPS does nothing.

Also see sections 35.3.4 EndIf and 35.3.3 Else .

Syntax¶

If(<command>)

Example¶

Here is a standard example:

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

If( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring) 
EndIf( test -d ${UPS_PROD_DIR}/exciting )

Here is an example showing behavior with dependencies. If foo depends on bar (i.e., bar appears in foo 's dependency list), then the code:

SetupRequired(foo)
  If( some command that's true )
     SetupRequired(bar)
  Else()
  Endif( some command )

puts nothing inside the If statement in the generated script files, since the SetupRequired(bar) is redundant.

Similarly, if foo depends on bar v2, then:

If( some command )
     SetupRequired(bar v1)
  Else()
     SetupRequired(bar v2)
  Endif( some command )

sets up either bar v1 or nothing , since the second one is redundant. If you want different dependencies, you must use different stanzas in the table file.

35.3.18 pathAppend¶

Description¶

Append <value> to existing $PATH-like environment variable. Reversible (runs pathRemove ).

It is better to append than prepend if you just want to provide a value in case one is not there. If you want to override any existing value, you should prepend.

Syntax¶

pathAppend(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathAppend(PATH, ${UPS_PROD_DIR}/bin)

Appends the value ${UPS_PROD_DIR}/bin to the $PATH variable using the default delimiter.

35.3.19 pathPrepend¶

Description¶

Prepend <value> to existing $PATH-like environment variable. Reversible (runs pathRemove ).

It is better to prepend than append if you want to override any existing value. If you just want to provide a value in case one is not there, you should append.

Syntax¶

pathPrepend(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathPrepend(PATH, ${UPS_PROD_DIR}/bin)

Prepends the value ${UPS_PROD_DIR}/bin to the $PATH variable using the default delimiter.

35.3.20 pathRemove¶

Description¶

Remove the string <value> from existing $PATH-like environment variable. Reversible (runs pathAppend ).

Syntax¶

pathRemove(<VARIABLE>, <value> [, <delimiter>])

Example¶

pathRemove(PATH, ${UPS_PROD_DIR}/bin)

Removes the value ${UPS_PROD_DIR}/bin from the $PATH variable.

35.3.21 pathSet¶

Description¶

Set a $PATH-like environment variable (in csh family, setting a $PATH is different than setting other environment variables). No choice of delimiter offered. Reversible (runs envUnset ).

If this gets set wrong, your $PATH could get deleted. (To recover from this problem, should it occur, simply run setup setpath .)

Syntax¶

pathSet(<VARIABLE>, <value>)

Example¶

pathSet(PATH, /afs/fnal.gov/ups/<prod1/v1_0/SunOS+5/bin: ...)

Sets the $PATH to the value given (sample value truncated after first delimiter for brevity).

35.3.22 prodDir¶

Description¶

Set the $<PRODUCT>_DIR environment variable to the root directory of the product instance. Reversible (runs unProdDir ).

Syntax¶

prodDir()

35.3.23 setupEnv¶

Description¶

Set the $SETUP_<PRODUCT> environment variable so that product can later be unsetup. Reversible (runs unsetupEnv ).

Syntax¶

setupEnv()

35.3.24 setupOptional¶

Description¶

Setup another UPS product as a dependency, do not fail if the product doesn't exist. Reversible (runs unsetupOptional ).

Syntax¶

The syntax is similar to the command setup :

setupOptional("[<options>] <product> [<version>]")

Example¶

setupOptional("perl")

Setup the default instance of the product perl , if available. Do not fail if not found.

35.3.25 setupRequired¶

Description¶

Setup another UPS product as a dependency; fail if product not found. Reversible (runs unsetupRequired ).

Syntax¶

The syntax is similar to the command setup :

setupRequired("[<options>] <product> [<version>]")

Example¶

setupRequired("-j Info")

Setup the default instance of the product Info and no dependencies; fail if not available.

35.3.26 sourceCompileOpt¶

Description¶

Syntax¶

sourceCompileOpt("<fileName>")

Example¶

sourceCompileOpt("/my/compile/script")

This sources the specified script which was created with writeCompileScript . If script doesn't exist, process continues.

35.3.27 sourceCompileReq¶

Description¶

Source <fileName> and skip all remaining functions; fail if file not found. This is typically used in conjunction with writeCompileScript ; see section 35.3.38 writeCompileScript .

Syntax¶

sourceCompileReq("<fileName>")

Example¶

sourceCompileReq("/my/compile/script")

This sources the specified script which was created with writeCompileScript . If script doesn't exist, process fails.

35.3.28 sourceOptCheck¶

Description¶

UPS_ENV

define all local UPS environment variables before sourcing (the script or command relies on these being defined)

NO_UPS_ENV

do not define the local UPS environment variables (the script or command doesn't use them)

The functions sourceOptCheck , sourceOptional , sourceReqCheck , and sourceRequired each take an optional parameter ( EXIT_FLAG ). This parameter can take the following values:

CONTINUE

after sourcing the script, continue with the next function (the default)

EXIT

after sourcing the script, skip the rest of the functions

Syntax¶

sourceOptCheck(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceOptCheck(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If so, first and check return status for error. If error, abort script and return.

35.3.29 sourceOptional¶

Description¶

Check if <SCRIPT> exists and if so, source it. If script not found, continue. Reversible (runs sourceOptional on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceOptional(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceOptional(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If so, first . If not, continue.

35.3.30 sourceReqCheck¶

Description¶

Source <SCRIPT> and check return status for error; fail if script not found. If error, abort script and return. Reversible (runs sourceOptCheck on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceReqCheck(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceReqCheck(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If not, it will fail. If script exists, first and check return status for error. If error, abort script and return.

35.3.31 sourceRequired¶

Description¶

Source <SCRIPT> ; fail if script not found. Return status not checked. Reversible (runs sourceOptional on the "un" script, e.g., current and uncurrent ).

See section 35.3.28 sourceOptCheck for information about the parameters UPS_ENV_FLAG and EXIT_FLAG .

Syntax¶

sourceRequired(<SCRIPT>.${UPS_SHELL}, UPS_ENV_FLAG [, EXIT_FLAG])

Example¶

sourceRequired(${UPS_UPS_DIR}/current.${UPS_SHELL}, UPS_ENV)

Check if ${UPS_UPS_DIR}/current exists. If not, it will fail. If script exists, first .

35.3.32 unAlias¶

Description¶

Remove alias/function of specified name.

Syntax¶

unAlias(<NAME>)

35.3.33 Unless¶

Description¶

See also sections 35.3.3 Else and 35.3.5 EndUnless . See section 35.3.17 If for information on dependencies; EndUnless works in an analogous manner.

Syntax¶

Unless(<command>)

Example¶

Action=Setup 
ProdDir() 
SetupEnv() 
EnvSetIfNotSet(FOO,":")
EnvPrepend(FOO, ${UPS_PROD_DIR}/basic) 

Unless( test -d ${UPS_PROD_DIR}/exciting ) 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/boring)
Else() 
  EnvPrepend(FOO, ${UPS_PROD_DIR}/exciting) 
EndUnless( test -d ${UPS_PROD_DIR}/exciting )

35.3.34 unProdDir¶

Description¶

Unsets the $<PRODUCT>_DIR environment variable. Reversible (runs prodDir ).

Syntax¶

unProdDir()

35.3.35 unsetupEnv¶

Description¶

Unsets the $SETUP_<PRODUCT> environment variable. Reversible (runs setupEnv ).

Syntax¶

unsetupEnv()

35.3.36 unsetupOptional¶

Description¶

Runs unsetup on a product, does not fail if the product doesn't exist or if it's already unsetup. Reversible (runs setupOptional ).

Syntax¶

The syntax is similar to the command unsetup :

unsetupOptional("[<options>] <product> [<version>]")

For previously setup products, the only options that are recognized include -e , -j , and -v .

Example¶

unsetupOptional("perl")

Unsets the default instance of the product perl , if already setup. Does not fail if product doesn't exist or has already been unsetup.

35.3.37 unsetupRequired¶

Description¶

Runs unsetup on a product; fails if product not found. Reversible (runs setupRequired ).

Syntax¶

The syntax is similar to the command unsetup :

unsetupRequired("<options>] <product> [<version>]")

For previously setup products, the only options that are recognized include -e , -j , and -v .

Example¶

unsetupRequired("perl")

Unsets the default instance of the product perl , if already setup. Fails if product doesn't exist or has already been unsetup.

35.3.38 writeCompileScript¶

Description¶

Write a file of compiled functions for the given ACTION keyword value. It actually writes four files in total: <script>.[c]sh and un<script>.[c]sh .

The function writeCompileScript takes an optional parameter which can be one of the following:

OLD

if fileName exists, move the old one to fileName.old before creating the new one.

DATE

if fileName exists, move the old one to fileName.<datestamp> before creating the new one.

Syntax¶

writeCompileScript("<fileName>", "<ACTION>" [, OLD|DATE])

Example¶

writeCompileScript("/my/compile/script", "SETUP", OLD)

35.4 Functions under Consideration for Future Implementation¶

copyCatMan

copyHtml

Will copy html files from source directory specified in table file by HTML_SOURCE_DIR to target directory specified in the UPS database configuration file by HTML_TARGET_DIR.

copyInfo

Will copy Info files from source directory specified in table file by INFO_SOURCE_DIR to target directory specified in the UPS database configuration file by INFO_TARGET_DIR.

copyMan

copyNews

Will copy news files from source directory specified in table file by NEWS_SOURCE_DIR to target directory specified in the UPS database configuration file by NEWS_TARGET_DIR.

else ()

Will begin an alternative branch

elseif (<condition>)

Will proceed to another condition

endif ()

Will end a conditional branch

if (<condition>)

Will begin a conditional branch

uncopyCatMan

Will remove catman files from target directory specified in the UPS database configuration file by CATMAN_TARGET_DIR. Reversible (will run copyCatMan )

uncopyMan

Will remove man files from target directory specified in the UPS database configuration file by MAN_TARGET_DIR. Reversible (will run copyMan )

35.5 Examples of Functions within Actions¶

35.5.1 A setup Action¶

This first example shows a setup action:

ACTION=SETUP
 prodDir()
 setupEnv()
 pathAppend(PATH, ${UPS_PROD_DIR}/bin)
 setupRequired("crow")
 setupOptional("gypsy")

When the product instance gets setup, UPS does five things in addition to setup 's internal processes:

sets the variable $<PRODUCT>_DIR to the product root directory
sets the variable $SETUP_<PRODUCT> to identify the product instance for unsetup
appends the product's bin directory to the path
sets up the product crow (and aborts the setup if a suitable current instance of crow is not available)
sets up the product gypsy , if found ( setup proceeds whether or not a suitable current instance of gypsy is available).

35.5.2 A "declare as current" Action¶

A second example illustrates steps for UPS to complete when the product instance is declared as current to the database:

ACTION=CURRENT
 execute("echo Call final install script for ${UPS_PROD_NAME} ${UPS_PROD_VERSION}")
 sourceRequired(${UPS_UPS_DIR}/current, UPS_ENV)

UPS echoes the given text and sources the current script for the product.

35.6 Local Read-Only Variables Available to Functions¶

35.6.1 List of Current Read-Only Variables¶

When you use these variables, always enclose them in curly brackets ({}) as shown in the list.

Local Read-Only Variable Local Read-Only Variable	Description of Value Description of Value
${PRODUCTS} ${PRODUCTS}	Generally has the same value as the environment variable $PRODUCTS. The difference is that (read-only) ${PRODUCTS} keeps the value set at the time UPS was invoked, whereas (environment) $PRODUCTS may be reset. Generally has the same value as the environment variable $PRODUCTS. The difference is that (read-only) ${PRODUCTS} keeps the value set at the time UPS was invoked, whereas (environment) $PRODUCTS may be reset. You can reset $PRODUCTS (i.e., using the function envSet (PRODUCTS, "<value>" in the table file) in order to use a new value in the temp file; $PRODUCTS won't get overwritten by ${PRODUCTS} as the temp file executes. See the example that follows this table. You can reset $PRODUCTS (i.e., using the function envSet (PRODUCTS, "<value>" in the table file) in order to use a new value in the temp file; $PRODUCTS won't get overwritten by ${PRODUCTS} as the temp file executes. See the example that follows this table. Note that this is not valid for the other read-only variables in this table; if you try to reset them (as environment variables), your values will get overwritten by the read-only values as the temp file executes. Note that this is not valid for the other read-only variables in this table; if you try to reset them (as environment variables), your values will get overwritten by the read-only values as the temp file executes.
${UPS_REQ_QUALIFIERS} ${UPS_REQ_QUALIFIERS}	Requested product qualifiers (including optional ones), as opposed to the declared product qualifiers. Requested product qualifiers (including optional ones), as opposed to the declared product qualifiers. For example, if you run setup fred -q opt1:opt2 and fred is declared with QUALIFIERS="opt1", then ${UPS_PROD_QUALIFIERS} is "opt1", while ${UPS_REQ_QUALIFIERS} is "opt1:opt2". For example, if you run setup fred -q opt1:opt2 and fred is declared with QUALIFIERS="opt1", then ${UPS_PROD_QUALIFIERS} is "opt1", while ${UPS_REQ_QUALIFIERS} is "opt1:opt2".
${UPS_COMPILE} ${UPS_COMPILE}	Location and file name of a file containing compiled functions (see Chapter 38: Use of Compile Scripts in Table Files ). It has the value of the combined keywords: COMPILE_FILE_DIR/COMPILE_FILE Location and file name of a file containing compiled functions (see Chapter 38: Use of Compile Scripts in Table Files ). It has the value of the combined keywords: COMPILE_FILE_DIR/COMPILE_FILE
${UPS_DIR} ${UPS_DIR}	Entire path to the ups directory of a product. (This is not the same as the environment variable $UPS_DIR that points to the root directory of the UPS product!) Entire path to the ups directory of a product. (This is not the same as the environment variable $UPS_DIR that points to the root directory of the UPS product!)
${UPS_EXTENDED} ${UPS_EXTENDED}	This set to 1 if the -e (extended) option was specified in the setup command (see section 25.2.1 -e ) This set to 1 if the -e (extended) option was specified in the setup command (see section 25.2.1 -e )
${UPS_OPTIONS} ${UPS_OPTIONS}	Option string that was passed with the -O (upper case o ) flag (see Chapter 25: Generic Command Option Descriptions ) Option string that was passed with the -O (upper case o ) flag (see Chapter 25: Generic Command Option Descriptions )
${UPS_ORIGIN} ${UPS_ORIGIN}	This specifies the location of the master source files. This specifies the location of the master source files.
${UPS_OS_FLAVOR} ${UPS_OS_FLAVOR}	Operating system flavor as obtained from ups flavor Operating system flavor as obtained from ups flavor
${UPS_OVERRIDE} ${UPS_OVERRIDE}	This contains the UPS command line option -H <flavor> that would override the default; not set by default. Can be used to "lie" to UPS about the flavor of the machine. May be expanded in the future to contain other UPS command line options. This contains the UPS command line option -H <flavor> that would override the default; not set by default. Can be used to "lie" to UPS about the flavor of the machine. May be expanded in the future to contain other UPS command line options.
${UPS_PROD_DIR} ${UPS_PROD_DIR}	Product instance root directory; same value as the environment variable $<PRODUCT>_DIR Product instance root directory; same value as the environment variable $<PRODUCT>_DIR
${UPS_PROD_FLAVOR} ${UPS_PROD_FLAVOR}	Product flavor chosen during instance matching Product flavor chosen during instance matching
${UPS_PROD_NAME} ${UPS_PROD_NAME}	Product name as declared in the UPS database Product name as declared in the UPS database
${UPS_PROD_QUALIFIERS} ${UPS_PROD_QUALIFIERS}	Product qualifiers chosen during instance matching. Product qualifiers chosen during instance matching. These are the qualifiers declared with the selected instance . They are not necessarily the same set of qualifiers specified on the command line via the -q option (the UPS matching algorithm chooses the "best fit" based on the specified qualifiers; not necessarily an exact match). These are the qualifiers declared with the selected instance . They are not necessarily the same set of qualifiers specified on the command line via the -q option (the UPS matching algorithm chooses the "best fit" based on the specified qualifiers; not necessarily an exact match).
${UPS_PROD_VERSION} ${UPS_PROD_VERSION}	Product version as declared in the UPS database Product version as declared in the UPS database
${UPS_SHELL} ${UPS_SHELL}	Value can be csh or sh. Value can be csh or sh.
${UPS_SOURCE} ${UPS_SOURCE}	Value can be "source" for csh or "." for sh Value can be "source" for csh or "." for sh
${UPS_THIS_DB} ${UPS_THIS_DB}	Database in which this product instance is declared. Database in which this product instance is declared.
${UPS_UPS_DIR} ${UPS_UPS_DIR}	Path to the product instance's ups directory Path to the product instance's ups directory
${UPS_VERBOSE} ${UPS_VERBOSE}	This is set to 1 if the -v (verbose) option was specified (see Chapter 25: Generic Command Option Descriptions ). This is set to 1 if the -v (verbose) option was specified (see Chapter 25: Generic Command Option Descriptions ).

$PRODUCTS vs. ${PRODUCTS}: Resetting $PRODUCTS¶

This example is intended to illustrate the interaction between the read-only variable ${PRODUCTS} and the environment variable $PRODUCTS. There are a couple of potentially confusing points.

Let ${PRODUCTS} be set to /fnal/ups/db . Say in your table file you set $PRODUCTS to /path/to/mydb in the SETUP action, like this:

ACTION=SETUP
    envSet(PRODUCTS, "/path/to/mydb:${PRODUCTS}")

Now ${PRODUCTS} and $PRODUCTS are different. The following execute functions show the difference in the values. The function:

execute("echo $PRODUCTS", NO_UPS_ENV)

would produce:

/path/to/mydb:/fnal/ups/db

whereas the same function using ${PRODUCTS}, e.g.,

execute("echo ${PRODUCTS}", NO_UPS_ENV)

would produce only:

/fnal/ups/db

$PRODUCTS vs. ${PRODUCTS}: Effects on setup and ups depend¶

ACTION=SETUP
    envSet(PRODUCTS, "/path/to/mydb:${PRODUCTS}")
    setupRequired(fred v1_0)

execute ("setup fred v1_0", NO_UPS_ENV)

This function uses the environment variable $PRODUCTS.

35.6.2 Read-Only Variables under Consideration for the Future¶

Last revised on May 2014

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Chapter Contents¶

Chapter 35: Functions used in Actions¶

35.1 Overview of Functions¶

35.2 Reversible Functions¶

35.3 Function Descriptions¶

35.3.1 addAlias¶

Description¶

Syntax¶

Example 1¶

Example 2¶

35.3.2 doDefaults¶

Description¶

Syntax¶

Example¶

35.3.3 Else¶

Description¶

Syntax¶

Example¶

35.3.4 EndIf¶

Description¶

Syntax¶

Example¶

35.3.5 EndUnless¶

Description¶

Syntax¶

Example¶

35.3.6 envAppend¶

Description¶

Syntax¶

Example¶

35.3.7 envPrepend¶

Description¶

Syntax¶

Example¶

35.3.8 envRemove¶

Description¶

Syntax¶

Example¶

35.3.9 envSet¶

Description¶

Syntax¶

Example¶

35.3.10 envSetIfNotSet¶

Description¶

Syntax¶

Example¶

35.3.11 envUnset¶

Description¶

Syntax¶

Example¶

35.3.12 exeAccess¶

Description¶

Syntax¶

Example¶

35.3.13 exeActionOptional¶

Description¶

Syntax¶

Example¶

35.3.14 exeActionRequired¶

Description¶

Syntax¶

Example¶

35.3.15 execute¶

Description¶

Syntax¶

Example¶

35.3.16 fileTest¶

Description¶

Syntax¶

Example¶

35.3.17 If¶

Description¶

Syntax¶

Example¶

35.3.18 pathAppend¶