Add post-merge hook, related documentation, and tests.

diff --git a/git-clone.sh b/git-clone.sh
index 48dafa21cf9efef957739408c78ba4ab47494f13..5e582fe247892fa7dffc44556c939863c36edc35 100755 (executable)
--- a/git-clone.sh
+++ b/git-clone.sh
@@ -34,7 +34,11 @@ fi
 
 http_fetch () {
        # $1 = Remote, $2 = Local
-       curl -nsfL $curl_extra_args "$1" >"$2"
+       curl -nsfL $curl_extra_args "$1" >"$2" ||
+               case $? in
+               126|127) exit ;;
+               *)       return $? ;;
+               esac
 }
 
 clone_dumb_http () {
@@ -87,7 +91,7 @@ Perhaps git-update-server-info needs to be run there?"
 
 quiet=
 local=no
-use_local=no
+use_local_hardlink=yes
 local_shared=no
 unset template
 no_checkout=
@@ -99,6 +103,7 @@ origin_override=
 use_separate_remote=t
 depth=
 no_progress=
+local_explicitly_asked_for=
 test -t 1 || no_progress=--no-progress
 while
        case "$#,$1" in
@@ -108,9 +113,14 @@ while
          no_checkout=yes ;;
        *,--na|*,--nak|*,--nake|*,--naked|\
        *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
-       *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
+       *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local)
+         local_explicitly_asked_for=yes
+         use_local_hardlink=yes ;;
+       *,--no-h|*,--no-ha|*,--no-har|*,--no-hard|*,--no-hardl|\
+       *,--no-hardli|*,--no-hardlin|*,--no-hardlink|*,--no-hardlinks)
+         use_local_hardlink=no ;;
         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
-          local_shared=yes; use_local=yes ;;
+          local_shared=yes; ;;
        1,--template) usage ;;
        *,--template)
                shift; template="--template=$1" ;;
@@ -187,15 +197,36 @@ dir="$2"
 # Try using "humanish" part of source repo if user didn't specify one
 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 [ -e "$dir" ] && die "destination directory '$dir' already exists."
-mkdir -p "$dir" &&
-D=$(cd "$dir" && pwd) &&
-trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
-case "$bare" in
-yes)
-       GIT_DIR="$D" ;;
-*)
-       GIT_DIR="$D/.git" ;;
-esac && export GIT_DIR && git init $quiet ${template+"$template"} || usage
+[ yes = "$bare" ] && unset GIT_WORK_TREE
+[ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
+die "working tree '$GIT_WORK_TREE' already exists."
+D=
+W=
+cleanup() {
+       err=$?
+       test -z "$D" && rm -rf "$dir"
+       test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
+       cd ..
+       test -n "$D" && rm -rf "$D"
+       test -n "$W" && rm -rf "$W"
+       exit $err
+}
+trap cleanup 0
+mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
+test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
+W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
+if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
+       GIT_DIR="$D"
+else
+       GIT_DIR="$D/.git"
+fi &&
+export GIT_DIR &&
+GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
+
+if test -n "$bare"
+then
+       GIT_CONFIG="$GIT_DIR/config" git config core.bare true
+fi
 
 if test -n "$reference"
 then
@@ -233,34 +264,37 @@ fi
 rm -f "$GIT_DIR/CLONE_HEAD"
 
 # We do local magic only when the user tells us to.
-case "$local,$use_local" in
-yes,yes)
+case "$local" in
+yes)
        ( cd "$repo/objects" ) ||
-               die "-l flag seen but repository '$repo' is not local."
-
-       case "$local_shared" in
-       no)
-           # See if we can hardlink and drop "l" if not.
-           sample_file=$(cd "$repo" && \
-                         find objects -type f -print | sed -e 1q)
-
-           # objects directory should not be empty since we are cloning!
-           test -f "$repo/$sample_file" || exit
+               die "cannot chdir to local '$repo/objects'."
 
-           l=
-           if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
-           then
-                   l=l
-           fi &&
-           rm -f "$GIT_DIR/objects/sample" &&
-           cd "$repo" &&
-           find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
-           ;;
-       yes)
-           mkdir -p "$GIT_DIR/objects/info"
-           echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
-           ;;
-       esac
+       if test "$local_shared" = yes
+       then
+               mkdir -p "$GIT_DIR/objects/info"
+               echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
+       else
+               l= &&
+               if test "$use_local_hardlink" = yes
+               then
+                       # See if we can hardlink and drop "l" if not.
+                       sample_file=$(cd "$repo" && \
+                                     find objects -type f -print | sed -e 1q)
+                       # objects directory should not be empty because
+                       # we are cloning!
+                       test -f "$repo/$sample_file" || exit
+                       if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
+                       then
+                               rm -f "$GIT_DIR/objects/sample"
+                               l=l
+                       elif test -n "$local_explicitly_asked_for"
+                       then
+                               echo >&2 "Warning: -l asked but cannot hardlink to $repo"
+                       fi
+               fi &&
+               cd "$repo" &&
+               find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
+       fi
        git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
        ;;
 *)
@@ -349,7 +383,11 @@ then
        done < "$GIT_DIR/CLONE_HEAD"
 fi
 
-cd "$D" || exit
+if test -n "$W"; then
+       cd "$W" || exit
+else
+       cd "$D" || exit
+fi
 
 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 then