mirror of
https://github.com/chocolate-doom/chocpkg.git
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159 lines
4.5 KiB
Markdown
159 lines
4.5 KiB
Markdown
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Package files are shell scripts which set variables and call well-defined
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functions to describe how to build the package.
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## Modules
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`chocpkg` is divided into modules which provide specific functionality.
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Modules are installed by calling certain dedicated functions.
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Usually, your package should install a check module, a fetch module
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and a build module.
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### Check modules
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Check modules are modules which determine whether the package is
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installed on the system (may have been installed by `chocpkg` itself
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or the system package manager).
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If a check module is not installed, the default is to always
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assume the package is not installed:
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#### check_pkgconfig
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`check_pkgconfig` invokes `pkg-config` to determine if the package
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is installed. The name of the `pkg-config` .pc file must be provided
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as an argument to `check_pkgconfig`; for example:
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```shell
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check_pkgconfig SDL2
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```
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#### check_tool
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`check_tool` checks if a particular tool is installed in `$PATH`
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to determine if the package is installed. The name of the tool must
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be provided as an argument to `check_tool`; for example:
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```shell
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check_tool gnome-terminal
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```
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### Fetch modules
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Fetch modules specify how to retrieve the package from the Internet:
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#### fetch_download
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`fetch_download` downloads the package from a URL specified as an argument.
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The file to be downloaded is assumed to be a well-formed tar.gz file with
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all its contents in a directory that matches the package name; if this is
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not the case, the variable `$IS_TAR_BOMB` should be set to `true`.
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Example use:
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```shell
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fetch_download http://example.com/example-pkg.tar.gz
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IS_TAR_BOMB=true
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```
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#### fetch_git
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`fetch_git` downloads the package from a Git repository at the URL
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given as an argument. The branch `master` will be checked out by
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default; this can be overriden by providing the branch name as a second
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argument to `fetch_git`.
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Example use:
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```shell
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fetch_git http://example.com/example.git my-neato-branch
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```
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### Build modules
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Build modules specify how to build the package after it is fetched:
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#### build_autotools
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`build_autotools` builds the package assuming that it is laid out as a
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standard autotools package (ie. `./configure; make; make install`).
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Extra arguments passed to the function will be passed through to
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`configure`.
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Example use:
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```shell
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build_autotools --disable-broken-feature
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```
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### Variants
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Variants allow building of different versions of the same package. An
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example is "latest stable release" vs. "latest version from source
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repository". The default variant is called `stable`. A variant can be
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specified on the command line with a suffix, for example, to build the
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variant `latest` of package `neato-lib`:
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```shell
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chocpkg install neato-lib/latest
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```
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In package files the `variant` function is used for conditional code
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that is only executed for a particular variant. Usually this is used
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to select a fetch module. For example:
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```shell
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variant stable fetch_download http://example.com/neato-lib-0.0.1.tar.gz
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variant latest fetch_git git://example.com/neato-lib.git
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variant frob-branch fetch_git git://example.com/neato-lib.git frob-branch
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```
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By convention, the `stable` variant is "the most recent stable release
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of the package" while the `latest` variant is "the latest version in
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the source control repository".
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### Other modules and functions
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#### dependencies
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Arguments provided to the `dependencies` function are the names of other
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packages to install before trying to build this one.
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Example use:
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```shell
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dependencies other-package neato-lib
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```
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#### package_group
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`package_group` specifies that this is not really a package that
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should be built; rather, it just specifies a number of other packages
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to build.
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Example use:
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```shell
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# File contains no other lines
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package_group neato-lib dumbo-lib
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```
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## Advanced builds
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Complicated packages can require custom build steps. The following functions
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can therefore be overridden in the package file in exceptional circumstances.
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These are essentially the functions implemented by the modules described
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above.
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* `do_fetch`: the function which is invoked to fetch the package from the
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Internet. The fetched package is placed into `$PACKAGE_BUILD_DIR` for
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build.
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* `prebuild_setup`: define a function with this name to execute special
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setup commands in the root of a package just before it is built.
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* `do_build`: the function which is invoked to build the package.
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* `do_install`: the function which is invoked to install the package after
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it has been built. This function should install built files from
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`$PACKAGE_BUILD_DIR` into `$PACKAGE_INSTALL_DIR`.
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