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git/git-submodule.sh
Brandon Casey 4dca1aa650 git-submodule.sh: preserve stdin for the command spawned by foreach 
The user-supplied command spawned by 'submodule foreach' loses its
connection to the original standard input.  Instead, it is connected to the
output of a pipe within the git-submodule script.  The user-supplied
command supplied to 'submodule foreach' is spawned within a while loop
which is being piped into.  Due to the way shells implement piping output
to a while loop, a subshell is created with its standard input attached to
the output of the pipe.  This results in all of the commands executed
within the while loop to have their stdins modified in the same way,
including the user-supplied command.

This can cause a problem if the command requires reading from stdin or if
it changes its behavior based on whether stdin is a tty or not.  For
example, this problem was noticed when trying to execute the following:

   git submodule foreach git shortlog --since=two.weeks.ago

which printed a message about entering the first submodule and produced no
further output and exited with a status of zero.  In this case, shortlog
detected that it was not connected to a tty, and since no revision was
supplied as an argument, it attempted to read the list of revisions from
standard input.  Instead, it slurped up the list of submodules that was
being piped to the enclosing while loop and caused that loop to end early
without processing the remaining submodules.

Work around this behavior by saving the original standard input file
descriptor before the while loop, and restoring it when spawning the
user-supplied command.

This fixes the tests in t7407.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-29 18:25:49 -07:00

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#!/bin/sh
#
# git-submodules.sh: add, init, update or list git submodules
#
# Copyright (c) 2007 Lars Hjemli
dashless=$(basename "$0" | sed -e 's/-/ /')
USAGE="[--quiet] add [-b branch] [-f|--force] [--reference <repository>] [--] <repository> [<path>]
or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
or: $dashless [--quiet] init [--] [<path>...]
or: $dashless [--quiet] update [--init] [-N|--no-fetch] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
or: $dashless [--quiet] foreach [--recursive] <command>
or: $dashless [--quiet] sync [--] [<path>...]"
OPTIONS_SPEC=
. git-sh-setup
. git-parse-remote
require_work_tree
command=
branch=
force=
reference=
cached=
recursive=
init=
files=
nofetch=
update=
prefix=
# Resolve relative url by appending to parent's url
resolve_relative_url ()
{
remote=$(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
# $@ = path to limit submodule list
#
module_list()
{
git ls-files --error-unmatch --stage -- "$@" | sane_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
reference="$3"
# 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' exists, but is neither empty nor a git repository"
fi
test -e "$path" &&
die "A file already exist at path '$path'"
if test -n "$reference"
then
git-clone "$reference" -n "$url" "$path"
else
git-clone -n "$url" "$path"
fi ||
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
;;
-f | --force)
force=$1
;;
-q|--quiet)
GIT_QUIET=1
;;
--reference)
case "$2" in '') usage ;; esac
reference="--reference=$2"
shift
;;
--reference=*)
reference="$1"
shift
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
repo=$1
path=$2
if test -z "$path"; then
path=$(echo "$repo" |
sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
fi
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 "'$path' already exists in the index"
if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
then
echo >&2 "The following path is ignored by one of your .gitignore files:" &&
echo >&2 $path &&
echo >&2 "Use -f if you really want to add it."
exit 1
fi
# perhaps the path exists and is already a git repo, else clone it
if test -e "$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" "$reference" || exit
(
clear_local_git_env
cd "$path" &&
# ash fails to wordsplit ${branch:+-b "$branch"...}
case "$branch" in
'') git checkout -f -q ;;
?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
esac
) || die "Unable to checkout submodule '$path'"
fi
git add $force "$path" ||
die "Failed to add submodule '$path'"
git config -f .gitmodules submodule."$path".path "$path" &&
git config -f .gitmodules submodule."$path".url "$repo" &&
git add --force .gitmodules ||
die "Failed to register submodule '$path'"
}
#
# Execute an arbitrary command sequence in each checked out
# submodule
#
# $@ = command to execute
#
cmd_foreach()
{
# parse $args after "submodule ... foreach".
while test $# -ne 0
do
case "$1" in
-q|--quiet)
GIT_QUIET=1
;;
--recursive)
recursive=1
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
toplevel=$(pwd)
# dup stdin so that it can be restored when running the external
# command in the subshell (and a recursive call to this function)
exec 3<&0
module_list |
while read mode sha1 stage path
do
if test -e "$path"/.git
then
say "Entering '$prefix$path'"
name=$(module_name "$path")
(
prefix="$prefix$path/"
clear_local_git_env
cd "$path" &&
eval "$@" &&
if test -n "$recursive"
then
cmd_foreach "--recursive" "$@"
fi
) <&3 3<&- ||
die "Stopping at '$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 "$1" in
-q|--quiet)
GIT_QUIET=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
module_list "$@" |
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 '$path'"
upd="$(git config -f .gitmodules submodule."$name".update)"
test -z "$upd" ||
git config submodule."$name".update "$upd" ||
die "Failed to register update mode 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".
orig_flags=
while test $# -ne 0
do
case "$1" in
-q|--quiet)
GIT_QUIET=1
;;
-i|--init)
init=1
;;
-N|--no-fetch)
nofetch=1
;;
-r|--rebase)
update="rebase"
;;
--reference)
case "$2" in '') usage ;; esac
reference="--reference=$2"
orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
shift
;;
--reference=*)
reference="$1"
;;
-m|--merge)
update="merge"
;;
--recursive)
recursive=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
shift
done
if test -n "$init"
then
cmd_init "--" "$@" || return
fi
module_list "$@" |
while read mode sha1 stage path
do
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
update_module=$(git config submodule."$name".update)
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" "$url" "$reference"|| exit
subsha1=
else
subsha1=$(clear_local_git_env; cd "$path" &&
git rev-parse --verify HEAD) ||
die "Unable to find current revision in submodule path '$path'"
fi
if ! test -z "$update"
then
update_module=$update
fi
if test "$subsha1" != "$sha1"
then
force=
if test -z "$subsha1"
then
force="-f"
fi
if test -z "$nofetch"
then
(clear_local_git_env; cd "$path" &&
git-fetch) ||
die "Unable to fetch in submodule path '$path'"
fi
case "$update_module" in
rebase)
command="git rebase"
action="rebase"
msg="rebased onto"
;;
merge)
command="git merge"
action="merge"
msg="merged in"
;;
*)
command="git checkout $force -q"
action="checkout"
msg="checked out"
;;
esac
(clear_local_git_env; cd "$path" && $command "$sha1") ||
die "Unable to $action '$sha1' in submodule path '$path'"
say "Submodule path '$path': $msg '$sha1'"
fi
if test -n "$recursive"
then
(clear_local_git_env; cd "$path" && eval cmd_update "$orig_flags") ||
die "Failed to recurse into submodule path '$path'"
fi
done
}
set_name_rev () {
revname=$( (
clear_local_git_env
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=
diff_cmd=diff-index
# parse $args after "submodule ... summary".
while test $# -ne 0
do
case "$1" in
--cached)
cached="$1"
;;
--files)
files="$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 --default HEAD ${1+"$1"})
then
head=$rev
test $# = 0 || shift
elif test -z "$1" -o "$1" = "HEAD"
then
# before the first commit: compare with an empty tree
head=$(git hash-object -w -t tree --stdin </dev/null)
test -z "$1" || shift
else
head="HEAD"
fi
if [ -n "$files" ]
then
test -n "$cached" &&
die "--cached cannot be used with --files"
diff_cmd=diff-files
head=
fi
cd_to_toplevel
# Get modified modules cared by user
modules=$(git $diff_cmd $cached --ignore-submodules=dirty --raw $head -- "$@" |
sane_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_cmd $cached --ignore-submodules=dirty --raw $head -- $modules |
sane_egrep '^:([0-7]* )?160000' |
cut -c2- |
while read mod_src mod_dst sha1_src sha1_dst status name
do
if test -z "$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 rev-list --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
if [ -n "$files" ]; then
echo "# Submodules changed but not updated:"
else
echo "# Submodule changes to be committed:"
fi
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".
orig_flags=
while test $# -ne 0
do
case "$1" in
-q|--quiet)
GIT_QUIET=1
;;
--cached)
cached=1
;;
--recursive)
recursive=1
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
orig_flags="$orig_flags $(git rev-parse --sq-quote "$1")"
shift
done
module_list "$@" |
while read mode sha1 stage path
do
name=$(module_name "$path") || exit
url=$(git config submodule."$name".url)
displaypath="$prefix$path"
if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
then
say "-$sha1 $displaypath"
continue;
fi
set_name_rev "$path" "$sha1"
if git diff-files --ignore-submodules=dirty --quiet -- "$path"
then
say " $sha1 $displaypath$revname"
else
if test -z "$cached"
then
sha1=$(clear_local_git_env; cd "$path" && git rev-parse --verify HEAD)
set_name_rev "$path" "$sha1"
fi
say "+$sha1 $displaypath$revname"
fi
if test -n "$recursive"
then
(
prefix="$displaypath/"
clear_local_git_env
cd "$path" &&
eval cmd_status "$orig_args"
) ||
die "Failed to recurse into submodule path '$path'"
fi
done
}
#
# Sync remote urls for submodules
# This makes the value for remote.$remote.url match the value
# specified in .gitmodules.
#
cmd_sync()
{
while test $# -ne 0
do
case "$1" in
-q|--quiet)
GIT_QUIET=1
shift
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
done
cd_to_toplevel
module_list "$@" |
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
(
say "Synchronizing submodule url for '$name'"
git config submodule."$name".url "$url"
clear_local_git_env
cd "$path"
remote=$(get_default_remote)
git config remote."$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)
GIT_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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