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PKG-LUA-SCRIPT(5)        DragonFly File Formats Manual       PKG-LUA-SCRIPT(5)


NAME

     lua scripts - lua scripts that are run by pkg(8)


DESCRIPTION

     pkg(8) run scripts at given phases of the process it is running.

     The phases are the following:

     pre-install:
             run before installing the files on the system.

     post-install:
             run after installing the files on the system.

     pre-deinstall:
             run before removing the files on the system.

     post-deinstall:
             run after removing the files on the system.

     A package can contain multiple scripts per phase, they will all be run
     inside their own lua VM.

     In the particular case of an upgrade the scripts are run in the following
     order:
     1.   new pre-install
     2.   old pre-deinstall
     3.   replace binaries
     4.   new post-install

     Lua scripts are always run after shell scripts (of the same phase).


API

     All the regular lua API are available to the exception of the following
     changes:

     io.open()
             has been modified to only open files relatively to the rootdir if
             specified by the -r argument passed to pkg(8).

     os.remove()
             has been modified to only remove files relatively to the rootdir
             if specified by the -r argument passed to pkg(8).

     os.rename()
             has been modified to only rename files relatively to the rootdir
             if specified by the -r argument passed to pkg(8).

     os.execute()
             has been disabled.

     The following variables are available defined to any lua scripts:

     pkg_name
             name of the package.

     pkg_prefix
             PREFIX defined within the package at build time.

     pkg_rootdir
             represents the root directory where the package will be installed
             as specified by the -r arguments passed to pkg(8).

     pkg_upgrade
             Boolean to inform the scripts that it is running or not in the
             context of an upgrade

     The following functions have been added:

     out pkg.prefixed_path(in)
             prepend pkg_prefix to in if needed and returns it as out.

     pkg.print_msg(msg)
             send messages to the user that will be shown at the end of the
             pkg(8) process.

     pkg.filecmp(file1, file2)
             Compare 2 files, return 0 if the files are identical, 1 if the
             files are different and >1 if an error occured

     pkg.copy(source, destination)
             Copy a file preserving its attributes. return -1 if an error
             occured

     st pkg.stat(file)
             return an object table st with the following fields: type, size,
             uid, gid

     pkg.symlink(source, destination)
             Create a symbolic link destination pointing at source

     pkg.exec(arguments)
             Will execute the command arguments expected in the following
             form: `{command, arg1, arg2, arg3, ...}'

     res pkg.readdir(path)
             Will return an ipair with the list of elements contained in the
             directory the specicial directory `.' and `..' are be filtered
             out.


SEE ALSO

     pkg_create(3), pkg_printf(3), pkg_repos(3), pkg-keywords(5),
     pkg-repository(5), pkg-script(5), pkg-triggers(5), pkg.conf(5), pkg(8),
     pkg-add(8), pkg-alias(8), pkg-annotate(8), pkg-audit(8),
     pkg-autoremove(8), pkg-check(8), pkg-clean(8), pkg-config(8),
     pkg-create(8), pkg-delete(8), pkg-fetch(8), pkg-info(8), pkg-install(8),
     pkg-lock(8), pkg-query(8), pkg-register(8), pkg-repo(8), pkg-rquery(8),
     pkg-search(8), pkg-set(8), pkg-shell(8), pkg-shlib(8), pkg-ssh(8),
     pkg-stats(8), pkg-triggers(8), pkg-update(8), pkg-updating(8),
     pkg-upgrade(8), pkg-version(8), pkg-which(8)

DragonFly 6.5-DEVELOPMENT        July 27, 2022       DragonFly 6.5-DEVELOPMENT

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