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https://github.com/git/git.git
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Add git-submodule command
This command can be used to initialize, update and inspect submodules. It uses a .gitmodules file, readable by git-config, in the top level directory of the 'superproject' to specify a mapping between submodule paths and repository url. Example .gitmodules layout: [module "git"] url = git://git.kernel.org/pub/scm/git/git.git With this entry in .gitmodules (and a commit reference in the index entry for the path "git"), the command 'git submodule init' will clone the repository at kernel.org into the directory "git". Known issues ============ There is currently no way to override the url found in the .gitmodules file, except by manually creating the subproject repository. The place to fix this in the script has a rather long comment about a possible plan. Funny paths will be quoted in the output from git-ls-files, but git-submodule does not attempt to unquote (or even detect the presence of) such paths. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Lars Hjemli
Junio C Hamano
parent
99b5a79e13
commit
70c7ac22de
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@ -126,6 +126,7 @@ git-ssh-push
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git-ssh-upload
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git-status
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git-stripspace
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git-submodule
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git-svn
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git-svnimport
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git-symbolic-ref
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@ -180,6 +180,7 @@ sub format_one {
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git-ssh-upload synchingrepositories
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git-status mainporcelain
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git-stripspace purehelpers
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git-submodule mainporcelain
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git-svn foreignscminterface
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git-svnimport foreignscminterface
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git-symbolic-ref plumbingmanipulators
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@ -0,0 +1,65 @@
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git-submodule(1)
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================
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NAME
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----
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git-submodule - Initialize, update or inspect submodules
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SYNOPSIS
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--------
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'git-submodule' [--quiet] [--cached] [status|init|update] [--] [<path>...]
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COMMANDS
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--------
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status::
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Show the status of the submodules. This will print the SHA-1 of the
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currently checked out commit for each submodule, along with the
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submodule path and the output of gitlink:git-describe[1] for the
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SHA-1. Each SHA-1 will be prefixed with `-` if the submodule is not
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initialized and `+` if the currently checked out submodule commit
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does not match the SHA-1 found in the index of the containing
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repository. This command is the default command for git-submodule.
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init::
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Initialize the submodules, i.e. clone the git repositories specified
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in the .gitmodules file and checkout the submodule commits specified
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in the index of the containing repository. This will make the
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submodules HEAD be detached.
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update::
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Update the initialized submodules, i.e. checkout the submodule commits
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specified in the index of the containing repository. This will make
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the submodules HEAD be detached.
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OPTIONS
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-------
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-q, --quiet::
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Only print error messages.
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--cached::
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Display the SHA-1 stored in the index, not the SHA-1 of the currently
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checked out submodule commit. This option is only valid for the
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status command.
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<path>::
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Path to submodule(s). When specified this will restrict the command
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to only operate on the submodules found at the specified paths.
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FILES
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-----
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When cloning submodules, a .gitmodules file in the top-level directory
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of the containing repository is used to find the url of each submodule.
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This file should be formatted in the same way as $GIR_DIR/config. The key
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to each submodule url is "module.$path.url".
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AUTHOR
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------
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Written by Lars Hjemli <hjemli@gmail.com>
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GIT
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---
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Part of the gitlink:git[7] suite
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2
Makefile
2
Makefile
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@ -209,7 +209,7 @@ SCRIPT_SH = \
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git-applymbox.sh git-applypatch.sh git-am.sh \
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git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \
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git-merge-resolve.sh git-merge-ours.sh \
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git-lost-found.sh git-quiltimport.sh
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git-lost-found.sh git-quiltimport.sh git-submodule.sh
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SCRIPT_PERL = \
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git-add--interactive.perl \
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@ -0,0 +1,194 @@
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#!/bin/sh
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#
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# git-submodules.sh: init, update or list git submodules
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#
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# Copyright (c) 2007 Lars Hjemli
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USAGE='[--quiet] [--cached] [status|init|update] [--] [<path>...]'
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. git-sh-setup
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require_work_tree
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init=
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update=
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status=
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quiet=
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cached=
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#
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# print stuff on stdout unless -q was specified
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#
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say()
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{
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if test -z "$quiet"
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then
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echo "$@"
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fi
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}
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#
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# Run clone + checkout on missing submodules
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#
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# $@ = requested paths (default to all)
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#
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modules_init()
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{
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git ls-files --stage -- "$@" | grep -e '^160000 ' |
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while read mode sha1 stage path
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do
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# Skip submodule paths that already contain a .git directory.
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# This will also trigger if $path is a symlink to a git
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# repository
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test -d "$path"/.git && continue
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# If there already is a directory at the submodule path,
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# expect it to be empty (since that is the default checkout
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# action) and try to remove it.
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# Note: if $path is a symlink to a directory the test will
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# succeed but the rmdir will fail. We might want to fix this.
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if test -d "$path"
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then
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rmdir "$path" 2>/dev/null ||
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die "Directory '$path' exist, but is neither empty nor a git repository"
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fi
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test -e "$path" &&
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die "A file already exist at path '$path'"
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url=$(GIT_CONFIG=.gitmodules git-config module."$path".url)
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test -z "$url" &&
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die "No url found for submodule '$path' in .gitmodules"
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# MAYBE FIXME: this would be the place to check GIT_CONFIG
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# for a preferred url for this submodule, possibly like this:
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#
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# modname=$(GIT_CONFIG=.gitmodules git-config module."$path".name)
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# alturl=$(git-config module."$modname".url)
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#
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# This would let the versioned .gitmodules file use the submodule
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# path as key, while the unversioned GIT_CONFIG would use the
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# logical modulename (if present) as key. But this would need
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# another fallback mechanism if the module wasn't named.
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git-clone -n "$url" "$path" ||
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die "Clone of submodule '$path' failed"
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(unset GIT_DIR && cd "$path" && git-checkout -q "$sha1") ||
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die "Checkout of submodule '$path' failed"
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say "Submodule '$path' initialized"
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done
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}
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#
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# Checkout correct revision of each initialized submodule
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#
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# $@ = requested paths (default to all)
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#
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modules_update()
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{
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git ls-files --stage -- "$@" | grep -e '^160000 ' |
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while read mode sha1 stage path
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do
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if ! test -d "$path"/.git
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then
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# Only mention uninitialized submodules when its
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# path have been specified
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test "$#" != "0" &&
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say "Submodule '$path' not initialized"
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continue;
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fi
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subsha1=$(unset GIT_DIR && cd "$path" &&
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git-rev-parse --verify HEAD) ||
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die "Unable to find current revision of submodule '$path'"
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if test "$subsha1" != "$sha1"
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then
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(unset GIT_DIR && cd "$path" && git-fetch &&
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git-checkout -q "$sha1") ||
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die "Unable to checkout '$sha1' in submodule '$path'"
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say "Submodule '$path': checked out '$sha1'"
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fi
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done
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}
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#
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# List all registered submodules, prefixed with:
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# - submodule not initialized
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# + different revision checked out
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#
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# If --cached was specified the revision in the index will be printed
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# instead of the currently checked out revision.
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#
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# $@ = requested paths (default to all)
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#
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modules_list()
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{
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git ls-files --stage -- "$@" | grep -e '^160000 ' |
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while read mode sha1 stage path
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do
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if ! test -d "$path"/.git
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then
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say "-$sha1 $path"
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continue;
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fi
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revname=$(unset GIT_DIR && cd "$path" && git-describe $sha1)
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if git diff-files --quiet -- "$path"
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then
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say " $sha1 $path ($revname)"
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else
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if test -z "$cached"
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then
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sha1=$(unset GIT_DIR && cd "$path" && git-rev-parse --verify HEAD)
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revname=$(unset GIT_DIR && cd "$path" && git-describe $sha1)
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fi
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say "+$sha1 $path ($revname)"
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fi
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done
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}
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while case "$#" in 0) break ;; esac
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do
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case "$1" in
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init)
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init=1
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;;
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update)
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update=1
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;;
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status)
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status=1
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;;
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-q|--quiet)
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quiet=1
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;;
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--cached)
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cached=1
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;;
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--)
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break
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;;
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-*)
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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case "$init,$update,$status,$cached" in
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1,,,)
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modules_init "$@"
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;;
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,1,,)
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modules_update "$@"
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;;
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,,*,*)
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modules_list "$@"
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;;
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*)
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usage
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;;
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esac
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