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submodule: rewrite module_clone shell function in C

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This reimplements the helper function `module_clone` in shell
in C as `clone`. This functionality is needed for converting
`git submodule update` later on, which we want to add threading
to.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
2015-09-08 11:57:45 -07:00
committed by Junio C Hamano
parent 0ea306ef17
commit ee8838d157
2 changed files with 134 additions and 76 deletions
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78
git-submodule.sh
View File

@ -178,80 +178,6 @@ get_submodule_config () {
printf '%s' "${value:-$default}"
}
#
# Clone a submodule
#
# $1 = submodule path
# $2 = submodule name
# $3 = URL to clone
# $4 = reference repository to reuse (empty for independent)
# $5 = depth argument for shallow clones (empty for deep)
#
# 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()
{
sm_path=$1
name=$2
url=$3
reference="$4"
depth="$5"
quiet=
if test -n "$GIT_QUIET"
then
quiet=-q
fi
gitdir=
gitdir_base=
base_name=$(dirname "$name")
gitdir=$(git rev-parse --git-dir)
gitdir_base="$gitdir/modules/$base_name"
gitdir="$gitdir/modules/$name"
if test -d "$gitdir"
then
mkdir -p "$sm_path"
rm -f "$gitdir/index"
else
mkdir -p "$gitdir_base"
(
clear_local_git_env
git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
--separate-git-dir "$gitdir" "$url" "$sm_path"
) ||
die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
fi
# We already are at the root of the work tree but cd_to_toplevel will
# resolve any symlinks that might be present in $PWD
a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
# Remove all common leading directories after a sanity check
if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
fi
while test "${a%%/*}" = "${b%%/*}"
do
a=${a#*/}
b=${b#*/}
done
# Now chop off the trailing '/'s that were added in the beginning
a=${a%/}
b=${b%/}
# Turn each leading "*/" component into "../"
rel=$(printf '%s\n' "$b" | sed -e 's|[^/][^/]*|..|g')
printf '%s\n' "gitdir: $rel/$a" >"$sm_path/.git"
rel=$(printf '%s\n' "$a" | sed -e 's|[^/][^/]*|..|g')
(clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
}
isnumber()
{
n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
@ -412,7 +338,7 @@ Use -f if you really want to add it." >&2
echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
fi
fi
module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" || exit
git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" "$reference" "$depth" || exit
(
clear_local_git_env
cd "$sm_path" &&
@ -774,7 +700,7 @@ Maybe you want to use 'update --init'?")"
if ! test -d "$sm_path"/.git && ! test -f "$sm_path"/.git
then
module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$prefix" --path "$sm_path" --name "$name" --url "$url" "$reference" "$depth" || exit
cloned_modules="$cloned_modules;$name"
subsha1=
else