# setup_hook NAME
setup_hook()
{
- hook_call="\"\$(tg --hooks-path)\"/$1 \"\$@\""
+ hook_call="\"\$($tg --hooks-path)\"/$1 \"\$@\""
if [ -f "$git_dir/hooks/$1" ] &&
fgrep -q "$hook_call" "$git_dir/hooks/$1"; then
# Another job well done!
return
fi
- # Prepare incanation
+ # Prepare incantation
if [ -x "$git_dir/hooks/$1" ]; then
hook_call="$hook_call"' || exit $?'
else
# setup_ours (no arguments)
setup_ours()
{
- if [ ! -s "$git_dir/info/gitattributes" ] || ! grep -q topmsg "$git_dir/info/gitattributes"; then
+ if [ ! -s "$git_dir/info/attributes" ] || ! grep -q topmsg "$git_dir/info/attributes"; then
{
- echo -e ".topmsg\tmerge=ours"
- echo -e ".topdeps\tmerge=ours"
- } >>"$git_dir/info/gitattributes"
+ echo ".topmsg merge=ours"
+ echo ".topdeps merge=ours"
+ } >>"$git_dir/info/attributes"
fi
if ! git config merge.ours.driver >/dev/null; then
git config merge.ours.name '"always keep ours" merge driver'
# measure_branch NAME [BASE]
measure_branch()
{
- _name="$1"; _base="$2"
- [ -n "$_base" ] || _base="refs/top-bases/$_name"
+ _bname="$1"; _base="$2"
+ [ -n "$_base" ] || _base="refs/top-bases/$_bname"
# The caller should've verified $name is valid
- _commits="$(git rev-list "$_name" ^"$_base" | wc -l)"
- _nmcommits="$(git rev-list --no-merges "$_name" ^"$_base" | wc -l)"
+ _commits="$(git rev-list "$_bname" ^"$_base" | wc -l)"
+ _nmcommits="$(git rev-list --no-merges "$_bname" ^"$_base" | wc -l)"
if [ $_commits -gt 1 ]; then
_suffix="commits"
else
# Whether B1 is a superset of B2.
branch_contains()
{
- [ -z "$(git rev-list ^"$1" "$2")" ]
+ [ -z "$(git rev-list ^"$1" "$2" --)" ]
}
-# needs_update NAME [BRANCHPATH...]
+# ref_exists REF
+# Whether REF is a valid ref name
+ref_exists()
+{
+ git rev-parse --verify "$@" >/dev/null 2>&1
+}
+
+# has_remote BRANCH
+# Whether BRANCH has a remote equivalent (accepts top-bases/ too)
+has_remote()
+{
+ [ -n "$base_remote" ] && ref_exists "remotes/$base_remote/$1"
+}
+
+# recurse_deps CMD NAME [BRANCHPATH...]
+# Recursively eval CMD on all dependencies of NAME.
+# CMD can refer to $_name for queried branch name,
+# $_dep for dependency name,
+# $_depchain for space-seperated branch backtrace,
+# and the $_dep_is_tgish boolean.
+# It can modify $_ret to affect the return value
+# of the whole function.
+# If recurse_deps() hits missing dependencies, it will append
+# them to space-separated $missing_deps list and skip them.
+recurse_deps()
+{
+ _cmd="$1"; shift
+ _name="$1"; # no shift
+ _depchain="$*"
+
+ _depsfile="$(mktemp -t tg-depsfile.XXXXXX)"
+ # Check also our base against remote base. Checking our head
+ # against remote head has to be done in the helper.
+ if has_remote "top-bases/$_name"; then
+ echo "refs/remotes/$base_remote/top-bases/$_name" >>"$_depsfile"
+ fi
+ git cat-file blob "$_name:.topdeps" >>"$_depsfile"
+
+ _ret=0
+ while read _dep; do
+ if ! ref_exists "$_dep" ; then
+ # All hope is lost
+ missing_deps="$missing_deps $_dep"
+ continue
+ fi
+
+ _dep_is_tgish=1
+ ref_exists "refs/top-bases/$_dep" ||
+ _dep_is_tgish=
+
+ # Shoo shoo, keep our environment alone!
+ [ -z "$_dep_is_tgish" ] ||
+ (recurse_deps "$_cmd" "$_dep" "$@") ||
+ _ret=$?
+
+ eval "$_cmd"
+ done <"$_depsfile"
+ missing_deps="${missing_deps# }"
+ rm "$_depsfile"
+ return $_ret
+}
+
+# branch_needs_update
+# This is a helper function for determining whether given branch
+# is up-to-date wrt. its dependencies. It expects input as if it
+# is called as a recurse_deps() helper.
+# In case the branch does need update, it will echo it together
+# with the branch backtrace on the output (see needs_update()
+# description for details) and set $_ret to non-zero.
+branch_needs_update()
+{
+ _dep_base_update=
+ if [ -n "$_dep_is_tgish" ]; then
+ if has_remote "$_dep"; then
+ branch_contains "$_dep" "refs/remotes/$base_remote/$_dep" || _dep_base_update=%
+ fi
+ # This can possibly override the remote check result;
+ # we want to sync with our base first
+ branch_contains "$_dep" "refs/top-bases/$_dep" || _dep_base_update=:
+ fi
+
+ if [ -n "$_dep_base_update" ]; then
+ # _dep needs to be synced with its base/remote
+ echo "$_dep_base_update $_dep $_depchain"
+ _ret=1
+ elif [ -n "$_name" ] && ! branch_contains "refs/top-bases/$_name" "$_dep"; then
+ # Some new commits in _dep
+ echo "$_dep $_depchain"
+ _ret=1
+ fi
+}
+
+# needs_update NAME
# This function is recursive; it outputs reverse path from NAME
# to the branch (e.g. B_DIRTY B1 B2 NAME), one path per line,
# inner paths first. Innermost name can be ':' if the head is
-# not in sync with the base.
+# not in sync with the base or '%' if the head is not in sync
+# with the remote (in this order of priority).
# It will also return non-zero status if NAME needs update.
# If needs_update() hits missing dependencies, it will append
# them to space-separated $missing_deps list and skip them.
needs_update()
{
- git cat-file blob "$1:.topdeps" 2>/dev/null | {
- _ret=0
- while read _dep; do
- if !git rev-parse --verify "$_dep" >/dev/null 2>&1; then
- # All hope is lost
- missing_deps="$missing_deps $_dep"
- continue
- fi
-
- _dep_is_tgish=1
- git rev-parse --verify "refs/top-bases/$_dep" >/dev/null 2>&1 ||
- _dep_is_tgish=
-
- # Shoo shoo, keep our environment alone!
- [ -z "$_dep_is_tgish" ] ||
- (needs_update "$_dep" "$@") ||
- _ret=$?
-
- _dep_base_uptodate=1
- if [ -n "$_dep_is_tgish" ]; then
- branch_contains "$_dep" "refs/top-bases/$_dep" || _dep_base_uptodate=
- fi
-
- if [ -z "$_dep_base_uptodate" ]; then
- # _dep needs to be synced with its base
- echo ": $_dep $*"
- _ret=1
- elif ! branch_contains "refs/top-bases/$1" "$_dep"; then
- # Some new commits in _dep
- echo "$_dep $*"
- _ret=1
- fi
- done
- exit $_ret
- }
+ recurse_deps branch_needs_update "$@"
}
# branch_empty NAME
git symbolic-ref HEAD "$_base"
}
+# Show the help messages.
+do_help()
+{
+ if [ -z "$1" ] ; then
+ ## Build available commands list for help output
+
+ cmds=
+ sep=
+ for cmd in "@cmddir@"/tg-*; do
+ ! [ -r "$cmd" ] && continue
+ # strip directory part and "tg-" prefix
+ cmd="$(basename "$cmd")"
+ cmd="${cmd#tg-}"
+ cmds="$cmds$sep$cmd"
+ sep="|"
+ done
+
+ echo "TopGit v0.5 - A different patch queue manager"
+ echo "Usage: tg [-r REMOTE] ($cmds|help) ..."
+ elif [ -r "@cmddir@"/tg-$1 ] ; then
+ @cmddir@/tg-$1 -h || :
+ echo
+ if [ -r "@sharedir@/tg-$1.txt" ] ; then
+ cat "@sharedir@/tg-$1.txt"
+ fi
+ else
+ echo "`basename $0`: no help for $1" 1>&2
+ fi
+}
+
## Initial setup
set -e
git_dir="$(git rev-parse --git-dir)"
root_dir="$(git rev-parse --show-cdup)"; root_dir="${root_dir:-.}"
+# Make sure root_dir doesn't end with a trailing slash.
+root_dir="${root_dir%/}"
+base_remote="$(git config topgit.remote 2>/dev/null)" || :
+tg="tg"
# make sure merging the .top* files will always behave sanely
setup_ours
setup_hook "pre-commit"
+[ -d "@cmddir@" ] ||
+ die "No command directory: '@cmddir@'"
## Dispatch
# this is set by hooks.
[ -z "$tg__include" ] || return 0
+if [ "$1" = "-r" ]; then
+ shift; base_remote="$1"; shift
+ tg="$tg -r $base_remote"
+fi
+
cmd="$1"
[ -n "$cmd" ] || die "He took a duck in the face at two hundred and fifty knots"
shift
case "$cmd" in
-help)
- echo "TopGit v0.1 - A different patch queue manager"
- echo "Usage: tg (create|delete|info|patch|summary|update|help) ..."
+help|--help|-h)
+ do_help "$1"
exit 1;;
-create|delete|info|patch|summary|update)
- . "@cmddir@"/tg-$cmd;;
--hooks-path)
# Internal command
echo "@hooksdir@";;
*)
- echo "Unknown subcommand: $cmd" >&2
- exit 1;;
+ [ -r "@cmddir@"/tg-$cmd ] || {
+ echo "Unknown subcommand: $cmd" >&2
+ exit 1
+ }
+ . "@cmddir@"/tg-$cmd;;
esac
~ian / topgit.git / blobdiff