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git/git-submodule.sh

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#!/bin/sh
#
# git-submodules.sh: add, init, update or list git submodules
#
# Copyright (c) 2007 Lars Hjemli
USAGE="[--quiet] [--cached] \
[add <repo> [-b branch] <path>]|[status|init|update [-i|--init] [-N|--no-fetch]|summary [-n|--summary-limit <n>] [<commit>]] \
[--] [<path>...]|[foreach <command>]|[sync [--] [<path>...]]"
OPTIONS_SPEC=
. git-sh-setup
. git-parse-remote
require_work_tree
command=
branch=
quiet=
cached=
nofetch=
#
# print stuff on stdout unless -q was specified
#
say()
{
if test -z "$quiet"
then
echo "$@"
fi
}
# Resolve relative url by appending to parent's url
resolve_relative_url ()
{
remote=$(get_default_remote)
remoteurl=$(git config "remote.$remote.url") ||
die "remote ($remote) does not have a url defined in .git/config"
url="$1"
remoteurl=${remoteurl%/}
while test -n "$url"
do
case "$url" in
../*)
url="${url#../}"
remoteurl="${remoteurl%/*}"
;;
./*)
url="${url#./}"
;;
*)
break;;
esac
done
echo "$remoteurl/${url%/}"
}
#
# Get submodule info for registered submodules
# $@ = path to limit submodule list
#
module_list()
{
git ls-files --error-unmatch --stage -- "$@" | grep '^160000 '
}
#
# Map submodule path to submodule name
#
# $1 = path
#
module_name()
{
# Do we have "submodule.<something>.path = $1" defined in .gitmodules file?
re=$(printf '%s\n' "$1" | sed -e 's/[].[^$\\*]/\\&/g')
name=$( git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
sed -n -e 's|^submodule\.\(.*\)\.path '"$re"'$|\1|p' )
test -z "$name" &&
die "No submodule mapping found in .gitmodules for path '$path'"
echo "$name"
}
#
# Clone a submodule
#
# Prior to calling, cmd_update checks that a possibly existing
# path is not a git repository.
# Likewise, cmd_add checks that path does not exist at all,
# since it is the location of a new submodule.
#
module_clone()
{
path=$1
url=$2
# If there already is a directory at the submodule path,
# expect it to be empty (since that is the default checkout
# action) and try to remove it.
# Note: if $path is a symlink to a directory the test will
# succeed but the rmdir will fail. We might want to fix this.
if test -d "$path"
then
rmdir "$path" 2>/dev/null ||
die "Directory '$path' exist, but is neither empty nor a git repository"
fi
test -e "$path" &&
die "A file already exist at path '$path'"
git-clone -n "$url" "$path" ||
die "Clone of '$url' into submodule path '$path' failed"
}
#
# Add a new submodule to the working tree, .gitmodules and the index
#
# $@ = repo path
#
# optional branch is stored in global branch variable
#
cmd_add()
{
# parse $args after "submodule ... add".
while test $# -ne 0
do
case "$1" in
-b | --branch)
case "$2" in '') usage ;; esac
branch=$2
shift
;;
-q|--quiet)
quiet=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
repo=$1
path=$2
if test -z "$repo" -o -z "$path"; then
usage
fi
# assure repo is absolute or relative to parent
case "$repo" in
./*|../*)
# dereference source url relative to parent's url
realrepo=$(resolve_relative_url "$repo") || exit
;;
*:*|/*)
# absolute url
realrepo=$repo
;;
*)
die "repo URL: '$repo' must be absolute or begin with ./|../"
;;
esac
# normalize path:
# multiple //; leading ./; /./; /../; trailing /
path=$(printf '%s/\n' "$path" |
sed -e '
s|//*|/|g
s|^\(\./\)*||
s|/\./|/|g
:start
s|\([^/]*\)/\.\./||
tstart
s|/*$||
')
git ls-files --error-unmatch "$path" > /dev/null 2>&1 &&
die "'$path' already exists in the index"
# perhaps the path exists and is already a git repo, else clone it
if test -e "$path"
then
if test -d "$path"/.git -o -f "$path"/.git
then
echo "Adding existing repo at '$path' to the index"
else
die "'$path' already exists and is not a valid git repo"
fi
case "$repo" in
./*|../*)
url=$(resolve_relative_url "$repo") || exit
;;
*)
url="$repo"
;;
esac
git config submodule."$path".url "$url"
else
module_clone "$path" "$realrepo" || exit
(unset GIT_DIR; cd "$path" && git checkout -f -q ${branch:+-b "$branch" "origin/$branch"}) ||
die "Unable to checkout submodule '$path'"
fi
git add "$path" ||
die "Failed to add submodule '$path'"
git config -f .gitmodules submodule."$path".path "$path" &&
git config -f .gitmodules submodule."$path".url "$repo" &&
git add .gitmodules ||
die "Failed to register submodule '$path'"
}
#
# Execute an arbitrary command sequence in each checked out
# submodule
#
# $@ = command to execute
#
cmd_foreach()
{
module_list |
while read mode sha1 stage path
do
if test -e "$path"/.git
then
say "Entering '$path'"
(cd "$path" && eval "$@") ||
die "Stopping at '$path'; script returned non-zero status."
fi
done
}
#
# Register submodules in .git/config
#
# $@ = requested paths (default to all)
#
cmd_init()
{
# parse $args after "submodule ... init".
while test $# -ne 0
do
case "$1" in
-q|--quiet)
quiet=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
module_list "$@" |
while read mode sha1 stage path
do
# Skip already registered paths
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
test -z "$url" || continue
url=$(git config -f .gitmodules submodule."$name".url)
test -z "$url" &&
die "No url found for submodule path '$path' in .gitmodules"
# Possibly a url relative to parent
case "$url" in
./*|../*)
url=$(resolve_relative_url "$url") || exit
;;
esac
git config submodule."$name".url "$url" ||
die "Failed to register url for submodule path '$path'"
say "Submodule '$name' ($url) registered for path '$path'"
done
}
#
# Update each submodule path to correct revision, using clone and checkout as needed
#
# $@ = requested paths (default to all)
#
cmd_update()
{
# parse $args after "submodule ... update".
while test $# -ne 0
do
case "$1" in
-q|--quiet)
shift
quiet=1
;;
-i|--init)
shift
cmd_init "$@" || return
;;
-N|--no-fetch)
shift
nofetch=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
done
module_list "$@" |
while read mode sha1 stage path
do
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
if test -z "$url"
then
# Only mention uninitialized submodules when its
# path have been specified
test "$#" != "0" &&
say "Submodule path '$path' not initialized" &&
say "Maybe you want to use 'update --init'?"
continue
fi
if ! test -d "$path"/.git -o -f "$path"/.git
then
module_clone "$path" "$url" || exit
subsha1=
else
subsha1=$(unset GIT_DIR; cd "$path" &&
git rev-parse --verify HEAD) ||
die "Unable to find current revision in submodule path '$path'"
fi
if test "$subsha1" != "$sha1"
then
force=
if test -z "$subsha1"
then
force="-f"
fi
if test -z "$nofetch"
then
(unset GIT_DIR; cd "$path" &&
git-fetch) ||
die "Unable to fetch in submodule path '$path'"
fi
(unset GIT_DIR; cd "$path" &&
git-checkout $force -q "$sha1") ||
die "Unable to checkout '$sha1' in submodule path '$path'"
say "Submodule path '$path': checked out '$sha1'"
fi
done
}
set_name_rev () {
revname=$( (
unset GIT_DIR
cd "$1" && {
git describe "$2" 2>/dev/null ||
git describe --tags "$2" 2>/dev/null ||
git describe --contains "$2" 2>/dev/null ||
git describe --all --always "$2"
}
) )
test -z "$revname" || revname=" ($revname)"
}
#
# Show commit summary for submodules in index or working tree
#
# If '--cached' is given, show summary between index and given commit,
# or between working tree and given commit
#
# $@ = [commit (default 'HEAD'),] requested paths (default all)
#
cmd_summary() {
summary_limit=-1
for_status=
# parse $args after "submodule ... summary".
while test $# -ne 0
do
case "$1" in
--cached)
cached="$1"
;;
--for-status)
for_status="$1"
;;
-n|--summary-limit)
if summary_limit=$(($2 + 0)) 2>/dev/null && test "$summary_limit" = "$2"
then
:
else
usage
fi
shift
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
test $summary_limit = 0 && return
if rev=$(git rev-parse -q --verify "$1^0")
then
head=$rev
shift
else
head=HEAD
fi
cd_to_toplevel
# Get modified modules cared by user
modules=$(git diff-index $cached --raw $head -- "$@" |
egrep '^:([0-7]* )?160000' |
while read mod_src mod_dst sha1_src sha1_dst status name
do
# Always show modules deleted or type-changed (blob<->module)
test $status = D -o $status = T && echo "$name" && continue
# Also show added or modified modules which are checked out
GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
echo "$name"
done
)
test -z "$modules" && return
git diff-index $cached --raw $head -- $modules |
egrep '^:([0-7]* )?160000' |
cut -c2- |
while read mod_src mod_dst sha1_src sha1_dst status name
do
if test -z "$cached" &&
test $sha1_dst = 0000000000000000000000000000000000000000
then
case "$mod_dst" in
160000)
sha1_dst=$(GIT_DIR="$name/.git" git rev-parse HEAD)
;;
100644 | 100755 | 120000)
sha1_dst=$(git hash-object $name)
;;
000000)
;; # removed
*)
# unexpected type
echo >&2 "unexpected mode $mod_dst"
continue ;;
esac
fi
missing_src=
missing_dst=
test $mod_src = 160000 &&
! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_src^0 >/dev/null &&
missing_src=t
test $mod_dst = 160000 &&
! GIT_DIR="$name/.git" git-rev-parse -q --verify $sha1_dst^0 >/dev/null &&
missing_dst=t
total_commits=
case "$missing_src,$missing_dst" in
t,)
errmsg=" Warn: $name doesn't contain commit $sha1_src"
;;
,t)
errmsg=" Warn: $name doesn't contain commit $sha1_dst"
;;
t,t)
errmsg=" Warn: $name doesn't contain commits $sha1_src and $sha1_dst"
;;
*)
errmsg=
total_commits=$(
if test $mod_src = 160000 -a $mod_dst = 160000
then
range="$sha1_src...$sha1_dst"
elif test $mod_src = 160000
then
range=$sha1_src
else
range=$sha1_dst
fi
GIT_DIR="$name/.git" \
git log --pretty=oneline --first-parent $range | wc -l
)
total_commits=" ($(($total_commits + 0)))"
;;
esac
sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
if test $status = T
then
if test $mod_dst = 160000
then
echo "* $name $sha1_abbr_src(blob)->$sha1_abbr_dst(submodule)$total_commits:"
else
echo "* $name $sha1_abbr_src(submodule)->$sha1_abbr_dst(blob)$total_commits:"
fi
else
echo "* $name $sha1_abbr_src...$sha1_abbr_dst$total_commits:"
fi
if test -n "$errmsg"
then
# Don't give error msg for modification whose dst is not submodule
# i.e. deleted or changed to blob
test $mod_dst = 160000 && echo "$errmsg"
else
if test $mod_src = 160000 -a $mod_dst = 160000
then
limit=
test $summary_limit -gt 0 && limit="-$summary_limit"
GIT_DIR="$name/.git" \
git log $limit --pretty='format: %m %s' \
--first-parent $sha1_src...$sha1_dst
elif test $mod_dst = 160000
then
GIT_DIR="$name/.git" \
git log --pretty='format: > %s' -1 $sha1_dst
else
GIT_DIR="$name/.git" \
git log --pretty='format: < %s' -1 $sha1_src
fi
echo
fi
echo
done |
if test -n "$for_status"; then
echo "# Modified submodules:"
echo "#"
sed -e 's|^|# |' -e 's|^# $|#|'
else
cat
fi
}
#
# List all submodules, prefixed with:
# - submodule not initialized
# + different revision checked out
#
# If --cached was specified the revision in the index will be printed
# instead of the currently checked out revision.
#
# $@ = requested paths (default to all)
#
cmd_status()
{
# parse $args after "submodule ... status".
while test $# -ne 0
do
case "$1" in
-q|--quiet)
quiet=1
;;
--cached)
cached=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
module_list "$@" |
while read mode sha1 stage path
do
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
then
say "-$sha1 $path"
continue;
fi
set_name_rev "$path" "$sha1"
if git diff-files --quiet -- "$path"
then
say " $sha1 $path$revname"
else
if test -z "$cached"
then
sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
set_name_rev "$path" "$sha1"
fi
say "+$sha1 $path$revname"
fi
done
}
#
# Sync remote urls for submodules
# This makes the value for remote.$remote.url match the value
# specified in .gitmodules.
#
cmd_sync()
{
while test $# -ne 0
do
case "$1" in
-q|--quiet)
quiet=1
shift
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
done
cd_to_toplevel
module_list "$@" |
while read mode sha1 stage path
do
name=$(module_name "$path")
url=$(git config -f .gitmodules --get submodule."$name".url)
# Possibly a url relative to parent
case "$url" in
./*|../*)
url=$(resolve_relative_url "$url") || exit
;;
esac
if test -e "$path"/.git
then
(
unset GIT_DIR
cd "$path"
remote=$(get_default_remote)
say "Synchronizing submodule url for '$name'"
git config remote."$remote".url "$url"
)
fi
done
}
# This loop parses the command line arguments to find the
# subcommand name to dispatch. Parsing of the subcommand specific
# options are primarily done by the subcommand implementations.
# Subcommand specific options such as --branch and --cached are
# parsed here as well, for backward compatibility.
while test $# != 0 && test -z "$command"
do
case "$1" in
add | foreach | init | update | status | summary | sync)
command=$1
;;
-q|--quiet)
quiet=1
;;
-b|--branch)
case "$2" in
'')
usage
;;
esac
branch="$2"; shift
;;
--cached)
cached="$1"
;;
--)
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
# No command word defaults to "status"
test -n "$command" || command=status
# "-b branch" is accepted only by "add"
if test -n "$branch" && test "$command" != add
then
usage
fi
# "--cached" is accepted only by "status" and "summary"
if test -n "$cached" && test "$command" != status -a "$command" != summary
then
usage
fi
"cmd_$command" "$@"
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