Hi,
On Fri, Jan 03, 2014 at 10:06:11AM -0800, W. Trevor King wrote:
> From: "W. Trevor King" <wk...@tremily.us>
>
> The previous code only checked out the requested branch in cmd_add.
> This commit moves the branch-checkout logic into module_clone, where
> it can be shared by cmd_add and cmd_update. I also update the initial
> checkout command to use 'rebase' to preserve branches setup during
> module_clone.
>
> Signed-off-by: W. Trevor King <wk...@tremily.us>
> ---
>
> On Fri, Jan 03, 2014 at 09:49:01AM +0100, Francesco Pretto wrote:
> > - there's a developer "update" user. He will clone the submodule
> > repository with an *attached* HEAD. Subsequent "merge" or "rebase"
> > update operations will keep the HEAD attached.
>
> 'merge' and 'rebase' updates don't change the HEAD attachment.
> Branches stay branches and detached HEADs stay detached. If you've
> moved away from the 'checkout' update mechanism, the only thing you
> still need is a way to get an initial checkout on a branch. This
> should do it (I can add tests if folks like the general approach).
>
> git-submodule.sh | 30 +++++++++++++++++-------------
> 1 file changed, 17 insertions(+), 13 deletions(-)
>
> diff --git a/git-submodule.sh b/git-submodule.sh
> index 2979197..e2e5a6c 100755
> --- a/git-submodule.sh
> +++ b/git-submodule.sh
> @@ -253,6 +253,7 @@ module_clone()
> url=$3
> reference="$4"
> depth="$5"
> + branch="$6"
> quiet=
> if test -n "$GIT_QUIET"
> then
> @@ -306,7 +307,14 @@ module_clone()
> echo "gitdir: $rel/$a" >"$sm_path/.git"
>
> rel=$(echo $a | sed -e 's|[^/][^/]*|..|g')
> - (clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config
> core.worktree "$rel/$b")
Why should this line be removed? Is it not needed for correct
worktree <-> repo linking of submodules?
> + (
> + clear_local_git_env
> + cd "$sm_path" &&
> + GIT_WORK_TREE=. git config core.worktree "$rel/$b" &&
> + if test -n "$branch"; then
> + git checkout -f -q -B "$branch" "origin/$branch" &&
> echo "checked out $branch"
> + fi
> + ) || die "$(eval_gettext "Unable to setup cloned submodule
> '\$sm_path'")"
> }
>
> isnumber()
> @@ -469,16 +477,7 @@ 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
> - (
> - clear_local_git_env
> - cd "$sm_path" &&
> - # ash fails to wordsplit ${branch:+-b "$branch"...}
> - case "$branch" in
> - '') git checkout -f -q ;;
> - ?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
> - esac
> - ) || die "$(eval_gettext "Unable to checkout submodule
> '\$sm_path'")"
> + module_clone "$sm_path" "$sm_name" "$realrepo" "$reference"
> "$depth" "$branch" || exit
> fi
> git config submodule."$sm_name".url "$realrepo"
>
> @@ -815,7 +814,7 @@ Maybe you want to use 'update --init'?")"
>
> if ! test -d "$sm_path"/.git -o -f "$sm_path"/.git
> then
> - module_clone "$sm_path" "$name" "$url" "$reference"
> "$depth" || exit
> + module_clone "$sm_path" "$name" "$url" "$reference"
> "$depth" "$branch" || exit
> cloned_modules="$cloned_modules;$name"
> subsha1=
> else
> @@ -861,7 +860,12 @@ Maybe you want to use 'update --init'?")"
> case ";$cloned_modules;" in
> *";$name;"*)
> # then there is no local change to integrate
> - update_module= ;;
> + if test -n "$branch"; then
> + update_module="!git reset --hard -q"
Does that not put the user in danger of loosing changes?
I am wondering if we should maybe take a little different approach:
If submodule.<name>.branch is configured:
git submodule update
will checkout the configured branch instead of the sha1? Maybe something like
this (untested):
diff --git a/git-submodule.sh b/git-submodule.sh
index 2677f2e..eca519a 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -903,7 +903,13 @@ Maybe you want to use 'update --init'?")"
;;
esac
- if (clear_local_git_env; cd "$sm_path" && $command
"$sha1")
+ revision="$sha1"
+ if test -n "$branch"
+ then
+ revision="$branch"
+ fi
+
+ if (clear_local_git_env; cd "$sm_path" && $command
"$revision")
then
say "$say_msg"
elif test -n "$must_die_on_failure"
Then we do not need to write a command configuration into the local repository
configuration. If I understand the OP intention correctly, that should solve the
use-case.
Cheers Heiko
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