365 lines
7.0 KiB
Bash
Executable File
365 lines
7.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# git-submodules.sh: add, 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] [add <repo> [-b branch]|status|init|update] [--] [<path>...]'
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OPTIONS_SPEC=
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. git-sh-setup
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require_work_tree
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add=
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branch=
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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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# NEEDSWORK: identical function exists in get_repo_base in clone.sh
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get_repo_base() {
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(
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cd "`/bin/pwd`" &&
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cd "$1" || cd "$1.git" &&
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{
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cd .git
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pwd
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}
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) 2>/dev/null
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}
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# Resolve relative url by appending to parent's url
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resolve_relative_url ()
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{
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branch="$(git symbolic-ref HEAD 2>/dev/null)"
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remote="$(git config branch.${branch#refs/heads/}.remote)"
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remote="${remote:-origin}"
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remoteurl="$(git config remote.$remote.url)" ||
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die "remote ($remote) does not have a url in .git/config"
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url="$1"
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while test -n "$url"
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do
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case "$url" in
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../*)
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url="${url#../}"
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remoteurl="${remoteurl%/*}"
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;;
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./*)
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url="${url#./}"
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;;
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*)
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break;;
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esac
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done
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echo "$remoteurl/$url"
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}
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#
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# Map submodule path to submodule name
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#
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# $1 = path
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#
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module_name()
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{
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# Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
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re=$(printf '%s' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
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name=$( GIT_CONFIG=.gitmodules \
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git config --get-regexp '^submodule\..*\.path$' |
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sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
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test -z "$name" &&
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die "No submodule mapping found in .gitmodules for path '$path'"
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echo "$name"
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}
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#
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# Clone a submodule
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#
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# Prior to calling, modules_update checks that a possibly existing
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# path is not a git repository.
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# Likewise, module_add checks that path does not exist at all,
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# since it is the location of a new submodule.
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#
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module_clone()
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{
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path=$1
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url=$2
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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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git-clone -n "$url" "$path" ||
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die "Clone of '$url' into submodule path '$path' failed"
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}
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#
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# Add a new submodule to the working tree, .gitmodules and the index
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#
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# $@ = repo [path]
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#
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# optional branch is stored in global branch variable
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#
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module_add()
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{
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repo=$1
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path=$2
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if test -z "$repo"; then
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usage
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fi
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case "$repo" in
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./*|../*)
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# dereference source url relative to parent's url
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realrepo="$(resolve_relative_url $repo)" ;;
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*)
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# Turn the source into an absolute path if
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# it is local
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if base=$(get_repo_base "$repo"); then
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repo="$base"
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fi
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realrepo=$repo
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;;
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esac
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# Guess path from repo if not specified or strip trailing slashes
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if test -z "$path"; then
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path=$(echo "$repo" | sed -e 's|/*$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
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else
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path=$(echo "$path" | sed -e 's|/*$||')
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fi
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test -e "$path" &&
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die "'$path' already exists"
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git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
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die "'$path' already exists in the index"
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module_clone "$path" "$realrepo" || exit
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(unset GIT_DIR && cd "$path" && git checkout -q ${branch:+-b "$branch" "origin/$branch"}) ||
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die "Unable to checkout submodule '$path'"
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git add "$path" ||
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die "Failed to add submodule '$path'"
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GIT_CONFIG=.gitmodules git config submodule."$path".path "$path" &&
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GIT_CONFIG=.gitmodules git config submodule."$path".url "$repo" &&
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git add .gitmodules ||
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die "Failed to register submodule '$path'"
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}
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#
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# Register submodules in .git/config
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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 already registered paths
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name=$(module_name "$path") || exit
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url=$(git config submodule."$name".url)
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test -z "$url" || continue
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url=$(GIT_CONFIG=.gitmodules git config submodule."$name".url)
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test -z "$url" &&
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die "No url found for submodule path '$path' in .gitmodules"
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# Possibly a url relative to parent
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case "$url" in
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./*|../*)
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url="$(resolve_relative_url "$url")"
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;;
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esac
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git config submodule."$name".url "$url" ||
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die "Failed to register url for submodule path '$path'"
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say "Submodule '$name' ($url) registered for path '$path'"
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done
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}
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#
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# Update each submodule path to correct revision, using clone and checkout as needed
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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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name=$(module_name "$path") || exit
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url=$(git config submodule."$name".url)
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if test -z "$url"
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then
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# Only mention uninitialized submodules when its
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# path have been specified
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test "$#" != "0" &&
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say "Submodule path '$path' not initialized"
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continue
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fi
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if ! test -d "$path"/.git
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then
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module_clone "$path" "$url" || exit
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subsha1=
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else
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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 in submodule path '$path'"
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fi
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if test "$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 '$path'"
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say "Submodule path '$path': checked out '$sha1'"
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fi
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done
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}
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set_name_rev () {
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revname=$( (
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unset GIT_DIR &&
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cd "$1" && {
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git describe "$2" 2>/dev/null ||
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git describe --tags "$2" 2>/dev/null ||
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git describe --contains --tags "$2"
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}
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) )
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test -z "$revname" || revname=" ($revname)"
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}
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#
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# List all 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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name=$(module_name "$path") || exit
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url=$(git config submodule."$name".url)
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if test -z "url" || ! test -d "$path"/.git
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then
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say "-$sha1 $path"
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continue;
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fi
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set_name_rev "$path" "$sha1"
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if git diff-files --quiet -- "$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 "$path" && git rev-parse --verify HEAD)
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set_name_rev "$path" "$sha1"
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fi
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say "+$sha1 $path$revname"
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fi
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done
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}
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while test $# != 0
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do
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case "$1" in
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add)
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add=1
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;;
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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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-b|--branch)
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case "$2" in
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'')
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usage
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;;
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esac
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branch="$2"; shift
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;;
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--cached)
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cached=1
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;;
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--)
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break
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;;
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-*)
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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case "$add,$branch" in
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1,*)
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;;
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,)
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;;
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,*)
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usage
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;;
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esac
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case "$add,$init,$update,$status,$cached" in
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1,,,,)
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module_add "$@"
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;;
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,1,,,)
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modules_init "$@"
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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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