[PATCH] git-new-workdir: Don't fail if the target directory is empty
- From
Paul Smith <paul@mad-scientist.net>
- Date
- Nov 15, 2014, 17:49 UTC
- Message-ID
- <1416073760.9305.174.camel@homebase>
>From 545c0d526eaa41f9306b567275a7d53799987482 Mon Sep 17 00:00:00 2001
From: Paul Smith <paul@mad-scientist.net> Date: Fri, 14 Nov 2014 17:11:19 -0500 Subject: [PATCH] git-new-workdir: Don't fail if the target directory is empty
Also provide more error checking and clean up on failure.
Signed-off-by: Paul Smith <paul@mad-scientist.net> ---
Thanks Junio. I've reworked the change so it will automatically succeed if the directory does not exists or exists but is empty, and fail otherwise, which as far as I can tell is the behavior "git clone" uses as well. I removed the -f flag as no longer needed. I also added some cleanup that is performed if the new-workdir operation fails for any reason so you don't get partly-constructed workdirs. I also added more error checking so that we immediately stop if any step fails. Some may suggest "set -e" but that flag can be tricky... I preferred to make the failure explicit.
contrib/workdir/git-new-workdir | 54 +++++++++++++++++++++++++++++------------ 1 file changed, 39 insertions(+), 15 deletions(-)
diff --git a/contrib/workdir/git-new-workdir b/contrib/workdir/git-new-workdir index 75e8b25..c402000 100755 --- a/contrib/workdir/git-new-workdir +++ b/contrib/workdir/git-new-workdir @@ -10,6 +10,10 @@ die () { exit 128 } +failed () { + die "unable to create new workdir \"$new_workdir\"!" +} + if test $# -lt 2 || test $# -gt 3 then usage "$0 <repository> <new_workdir> [<branch>]" @@ -48,35 +52,55 @@ then "a complete repository." fi -# don't recreate a workdir over an existing repository -if test -e "$new_workdir" +# make sure the links use full paths +git_dir=$(cd "$git_dir"; pwd) + +# don't recreate a workdir over an existing directory unless it's empty +if test -d "$new_workdir" then - die "destination directory '$new_workdir' already exists." + if test $(ls -a1 "$new_workdir/." | wc -l) -ne 2 + then + die "destination directory '$new_workdir' is not empty." + fi + was_existing=true +else + mkdir -p "$new_workdir" || failed + was_existing=false fi -# make sure the links use full paths -git_dir=$(cd "$git_dir"; pwd) +cleanup () { + if $was_existing + then + rm -rf "$new_workdir"/* "$new_workdir"/.[!.] "$new_workdir"/.??* + else + rm -rf "$new_workdir" + fi +} +siglist="0 1 2 15" +trap cleanup $siglist -# create the workdir -mkdir -p "$new_workdir/.git" || die "unable to create \"$new_workdir\"!" +# create embedded directories +for x in logs +do + mkdir -p "$new_workdir/.git/$x" || failed +done # create the links to the original repo. explicitly exclude index, HEAD and # logs/HEAD from the list since they are purely related to the current working # directory, and should not be shared. for x in config refs logs/refs objects info hooks packed-refs remotes rr-cache svn do - case $x in - */*) - mkdir -p "$(dirname "$new_workdir/.git/$x")" - ;; - esac - ln -s "$git_dir/$x" "$new_workdir/.git/$x" + ln -s "$git_dir/$x" "$new_workdir/.git/$x" || failed done # now setup the workdir -cd "$new_workdir" +cd "$new_workdir" || failed # copy the HEAD from the original repository as a default branch -cp "$git_dir/HEAD" .git/HEAD +cp "$git_dir/HEAD" .git/HEAD || failed + +# don't delete the new workdir on exit +trap - $siglist + # checkout the branch (either the same as HEAD from the original repository, or # the one that was asked for) git checkout -f $branch
-- 1.8.5.3