Using 'defaults read' and storing the output in a variable

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LEARN ABOUT OSX

agvtool

AGVTOOL(1)						    BSD General Commands Manual 						AGVTOOL(1)

NAME

     agvtool -- Apple-generic versioning tool for Xcode projects

SYNOPSIS

     agvtool what-version | vers [-terse]
     agvtool [-noscm | -usecvs | -usesvn] next-version | bump [-all]
     agvtool [-noscm | -usecvs | -usesvn] new-version [-all] versionNumber
     agvtool [-noscm | -usecvs | -usesvn] tag [-force | -F] [-noupdatecheck | -Q] [-baseurlfortag]
     agvtool what-marketing-version | mvers [-terse | -terse1]
     agvtool [-noscm | -usecvs | -usesvn] new-marketing-version version

DESCRIPTION

     agvtool helps speed up common operations for Xcode projects that use the Apple Generic Versioning system.

     You enable versioning support by setting up some build settings in your project.

   Build Settings
     The settings used by the apple-generic versioning system are as follows:

     VERSIONING_SYSTEM	       This must be set to ``apple-generic'' at the project level to enable versioning.

     CURRENT_PROJECT_VERSION   This setting defines the the current version of the project. The value must be a integer or floating point number
			       like 57 or 365.8.

     DYLIB_CURRENT_VERSION     This setting defines the the current version of any framework built by the project. Like CURRENT_PROJECT_VERSION
			       the value must be an integer or floating point number like 57 or 365.8. By default it is set to
			       ``$(CURRENT_PROJECT_VERSION)''.

     VERSION_INFO_PREFIX       Used as a prefix for the name of the version info symbol in the generated versioning source file.  If you prefix
			       your exported symbols you will probably want to set this to the same prefix.

     VERSION_INFO_SUFFIX       Used as a suffix for the name of the version info symbol in the generated versioning source file.  This is rarely
			       used.

     VERSION_INFO_BUILDER      This defines a reference to the user performing a build to be included in the generated stub, and defaults to the
			       value of the USER environment variable.

     VERSION_INFO_EXPORT_DECL  This defines a prefix string for the version info symbol declaration in the generated stub. This can be used, for
			       example, to add an optional 'export' keyword to the version symbol declaration. This should rarely be changed.

     VERSION_INFO_FILE	       Used to specify a name for the source file that will be generated and compiled into your product.  By default this
			       is set to ``$(PRODUCT_NAME)_vers.c''.

     To enable Apple Generic Versioning, then, you must set up at least the VERSIONING_SYSTEM and CURRENT_PROJECT_VERSION project build settings
     for each project you want to be versioned.  The target of a versioned project will have two global variables generated and linked into your
     product.  One is of type double and is simply the CURRENT_PROJECT_VERSION.  The other is a version string which is formatted to be compatible
     with what(1).  These variables are available for use in your code.

     Projects with multiple targets are required to have the same CURRENT_PROJECT_VERSION for each target. The easiest way to achieve this is to
     set CURRENT_PROJECT_VERSION at the project level.

   Usage
     agvtool should be invoked with the working directory set to your project directory (the folder containing your .xcodeproj project file).

     agvtool pays attention to the following defaults for CVS usage: CVSEnabled and CVSToolPath.

     If CVSEnabled is set to YES then agvtool will perform certain CVS operations like committing modified project files and performing tagging
     operations.  You can set this default by issuing the following command:

	   defaults write agvtool CVSEnabled YES

     The sense of this default can be overidden by supplying an explicit -noscm (which turns off CVS and Subversion usage), -usecvs (which turns
     on CVS usage and turns off Subversion usage), or -usesvn (which turns off CVS usage and turns on Subversion usage).

     Set CVSToolPath to point to the location of the cvs tool to use. If this default is not set then agvtool will use /usr/bin/ocvs if it exists.
     Otherwise /usr/bin/cvs will be used. You can set this default by issuing the following command:

	   defaults write agvtool CVSToolPath pathToCVS

     agvtool pays attention to the following defaults for Subversion usage: SVNEnabled and SVNToolPath.

     If SVNEnabled is set to YES then agvtool will perform certain Subversion operations like committing modified project files and performing
     tagging operations.  You can set this default by issuing the following command:

	   defaults write agvtool SVNEnabled YES

     The sense of this default can be overidden by supplying an explicit -noscm (which turns off CVS and Subversion usage), -usecvs (which turns
     on CVS usage and turns off Subversion usage), or -usesvn (which turns off CVS usage and turns on Subversion usage).

     Set SVNToolPath to point to the location of the svn tool to use. If this default is not set then agvtool will use /usr/local/bin/svn if it
     exists. You can set this default by issuing the following command:

	   defaults write agvtool SVNToolPath pathToSVN

   Commands And Options
     what-version | vers [-terse]
	   Prints out the current version number of the project.

	   The -terse option can be used to limit the output to the version number only.

     next-version | bump [-all]
	   Increments the version numbers of all versioned targets to the next highest integral value.	For example, 54 will change to 55 and
	   234.6 will change to 235.

	   The CURRENT_PROJECT_VERSION and the DYLIB_CURRENT_VERSION will be updated.  The -all option will also update the CFBundleVersion
	   Info.plist key.

	   If CVS support is enabled, the modified project file will be committed.

     new-version [-all version]
	   Sets the version numbers of all versioned targets to the given version.

	   The CURRENT_PROJECT_VERSION and the DYLIB_CURRENT_VERSION will be updated.  The -all option will also update the CFBundleVersion
	   Info.plist key.

	   If CVS support is enabled, the modified project file will be committed.

     tag [-force | -F] [-noupdatecheck | -Q] [-baseurlfortag]
	   Create a new tag projectname-currentversion where projectname is the name of the Xcode project file (without the extension) and
	   currentversion is the CURRENT_PROJECT_VERSION with any '.' transformed into '~' (since CVS does not allow dots in tag names).

	   The -force or -F option will add a -F to the tag operation.

	   The -noupdatecheck or -Q option skips the cvs update usually done prior to tagging to ensure that there are no uncommitted changes.

	   The -baseurlfortag option can be used to provide a URL that points to the directory to place the "tag" in when using Subversion. This
	   overrides the SVNBaseTagURL default. This option is ignored if Subversion is not being used.

	   Note: This command will only function if CVS or Subversion support is enabled.

     what-marketing-version | mvers [-terse]
	   Prints the current marketing version of the project. For native targets, a marketing version is listed for each Info.plist file found.
	   For Jambase targets a marketing version is shown if a common value is found.

	   The marketing version is the CFBundleShortVersionString Info.plist key. This is often a totally different version determined by product
	   marketing folks.

	   The -terse option will limit the output to the version number only.

	   The -terse1 option will limit the output to the first version number found, and only display the version number.

     new-marketing-version version
	   Sets the marketing version numbers of all versioned targets to the given version number.

	   The marketing version is the CFBundleShortVersionString Info.plist key. This is often a totally different version determined by product
	   marketing folks.

	   If CVS support is enabled, the modified project file will be committed.

	   Do not use this command on a project with targets that track different marketing versions.

Mac OS X							   April 4, 2006							  Mac OS X

Shell Programming and Scripting