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Expand PKGBUILD documentation

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Add documentation for $startdir, $srcdir, and $pkgdir variables, as well as
general information about the build() function and about custom variables
in PKGBUILDs. This addresses FS#10634.

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2008-06-14 11:57:10 -05:00
parent fff746052c
commit 2158b8e298
1 changed files with 43 additions and 1 deletions
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44
doc/PKGBUILD.5.txt
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@ -30,12 +30,22 @@ distribution of this package.
Options and Directives
----------------------
The following is a list of standard options and directives available for use
in a PKGBUILD. These are all understood and interpreted by makepkg, and most
will be directly transferred to the built package.
If you need to create any custom variables for use in your build process, it is
recommended to name your custom variables with an '_' (underscore) prefix.
This will prevent any possible name clashes with internal makepkg variables.
For example, to store the base kernel version in a variable, use something
similar to `$_basekernver`.
*pkgname*::
The name of the package. This has be a unix-friendly name as it will be
used in the package filename.
*pkgver*::
The version of the software as released from the author (e.g. \'2.7.1').
The version of the software as released from the author (e.g. '2.7.1').
*pkgrel*::
This is the release number specific to the Arch Linux release. This
@ -205,6 +215,38 @@ Options and Directives
of a package changes (or is alphanumeric).
build() Function
----------------
In addition to the above directives, the build() bash function comprises the
remainder of the PKGBUILD. This is directly sourced and executed by makepkg, so
anything that bash or the system has available is available for use here. Be
sure any exotic commands used are covered by `makedepends`.
All of the above variables such as `pkgname` and `pkgver` are available for use
in the build function. In addition, makepkg defines three variables for your
use during the build and install process. These three variables are as follows:
*startdir*::
This contains the absolute path to the directory where the PKGBUILD was
located, which is usually the output of `$(pwd)` when makepkg is started.
$$startdir$$ was most often used in combination with `/src` or `/pkg`
postfixes, but use of the `srcdir` and `pkgdir` variables is preferred.
*srcdir*::
This points to the directory where makepkg extracts or copies all source
files. Although it currently is an alias for `$startdir/src`, this
assumption should not be assumed true for all future revisions of makepkg.
*pkgdir*::
This points to the directory where makepkg bundles the installed package
(this directory will become the root directory of your built package).
Although it currently is an alias for `$startdir/pkg`, this assumption
should not be assumed true for all future revisions of makepkg.
If you create any variables of your own in the build function, it is
recommended to use the bash `local` keyword to scope the variable to inside
the build function.
Install/Upgrade/Remove Scripting
--------------------------------
Pacman has the ability to store and execute a package-specific script when it