2 # TopGit - A different patch queue manager
3 # (c) Petr Baudis <pasky@suse.cz> 2008
12 echo "${TG_RECURSIVE}tg: $*"
21 # cat_file "topic:file"
22 # Like `git cat-file blob $1`, but topics '(i)' and '(w)' means index and worktree
28 arg
=$
(echo "$arg" |
tail --bytes=+5)
33 # ':file' means cat from index
34 arg
=$
(echo "$arg" |
tail --bytes=+5)
35 git cat-file blob
":$arg"
38 git cat-file blob
"$arg"
45 hook_call
="\"\$($tg --hooks-path)\"/$1 \"\$@\""
46 if [ -f "$git_dir/hooks/$1" ] &&
47 fgrep
-q "$hook_call" "$git_dir/hooks/$1"; then
48 # Another job well done!
52 if [ -x "$git_dir/hooks/$1" ]; then
53 hook_call
="$hook_call"' || exit $?'
55 hook_call
="exec $hook_call"
57 # Don't call hook if tg is not installed
58 hook_call
="if which \"$tg\" > /dev/null; then $hook_call; fi"
59 # Insert call into the hook
63 [ ! -s "$git_dir/hooks/$1" ] ||
cat "$git_dir/hooks/$1"
64 } >"$git_dir/hooks/$1+"
65 chmod a
+x
"$git_dir/hooks/$1+"
66 mv "$git_dir/hooks/$1+" "$git_dir/hooks/$1"
69 # setup_ours (no arguments)
72 if [ ! -s "$git_dir/info/attributes" ] ||
! grep -q topmsg
"$git_dir/info/attributes"; then
74 echo ".topmsg merge=ours"
75 echo ".topdeps merge=ours"
76 } >>"$git_dir/info/attributes"
78 if ! git config merge.ours.driver
>/dev
/null
; then
79 git config merge.ours.name
'"always keep ours" merge driver'
80 git config merge.ours.driver
'touch %A'
84 # measure_branch NAME [BASE]
87 _bname
="$1"; _base
="$2"
88 [ -n "$_base" ] || _base
="refs/top-bases/$_bname"
89 # The caller should've verified $name is valid
90 _commits
="$(git rev-list "$_bname" ^"$_base" -- | wc -l)"
91 _nmcommits
="$(git rev-list --no-merges "$_bname" ^"$_base" -- | wc -l)"
92 if [ $_commits -gt 1 ]; then
97 echo "$_commits/$_nmcommits $_suffix"
100 # branch_contains B1 B2
101 # Whether B1 is a superset of B2.
104 [ -z "$(git rev-list --max-count=1 ^"$1" "$2" --)" ]
108 # Whether REF is a valid ref name
111 git rev-parse
--verify "$@" >/dev
/null
2>&1
115 # Whether BRANCH has a remote equivalent (accepts top-bases/ too)
118 [ -n "$base_remote" ] && ref_exists
"remotes/$base_remote/$1"
125 # use the merge base in case the base is ahead.
126 mb
="$(git merge-base "refs
/top-bases
/$_name" "$_name")";
128 test "$(git rev-parse "$mb^
{tree
}")" = "$(git rev-parse "$_name^
{tree
}")";
132 # Whether REF is a SHA1 (compared to a symbolic name).
135 [ "$(git rev-parse "$1")" = "$1" ]
138 # recurse_deps CMD NAME [BRANCHPATH...]
139 # Recursively eval CMD on all dependencies of NAME.
140 # CMD can refer to $_name for queried branch name,
141 # $_dep for dependency name,
142 # $_depchain for space-seperated branch backtrace,
143 # and the $_dep_is_tgish boolean.
144 # It can modify $_ret to affect the return value
145 # of the whole function.
146 # If recurse_deps() hits missing dependencies, it will append
147 # them to space-separated $missing_deps list and skip them.
148 # remote dependencies are processed if no_remotes is unset.
152 _name
="$1"; # no shift
155 _depsfile
="$(mktemp -t tg-depsfile.XXXXXX)"
156 # If no_remotes is unset check also our base against remote base.
157 # Checking our head against remote head has to be done in the helper.
158 if test -z "$no_remotes" && has_remote
"top-bases/$_name"; then
159 echo "refs/remotes/$base_remote/top-bases/$_name" >>"$_depsfile"
162 # if the branch was annihilated, there exists no .topdeps file
163 if ! branch_annihilated
"$_name"; then
164 #TODO: handle nonexisting .topdeps?
165 git cat-file blob
"$_name:.topdeps" >>"$_depsfile";
170 if ! ref_exists
"$_dep" ; then
172 missing_deps
="$missing_deps $_dep"
177 ref_exists
"refs/top-bases/$_dep" ||
180 # Shoo shoo, keep our environment alone!
181 [ -z "$_dep_is_tgish" ] ||
182 (recurse_deps
"$_cmd" "$_dep" "$@") ||
187 missing_deps
="${missing_deps# }"
192 # branch_needs_update
193 # This is a helper function for determining whether given branch
194 # is up-to-date wrt. its dependencies. It expects input as if it
195 # is called as a recurse_deps() helper.
196 # In case the branch does need update, it will echo it together
197 # with the branch backtrace on the output (see needs_update()
198 # description for details) and set $_ret to non-zero.
199 branch_needs_update
()
202 if [ -n "$_dep_is_tgish" ]; then
203 if has_remote
"$_dep"; then
204 branch_contains
"$_dep" "refs/remotes/$base_remote/$_dep" || _dep_base_update
=%
206 # This can possibly override the remote check result;
207 # we want to sync with our base first
208 branch_contains
"$_dep" "refs/top-bases/$_dep" || _dep_base_update
=:
211 if [ -n "$_dep_base_update" ]; then
212 # _dep needs to be synced with its base/remote
213 echo "$_dep_base_update $_dep $_depchain"
215 elif [ -n "$_name" ] && ! branch_contains
"refs/top-bases/$_name" "$_dep"; then
216 # Some new commits in _dep
217 echo "$_dep $_depchain"
223 # This function is recursive; it outputs reverse path from NAME
224 # to the branch (e.g. B_DIRTY B1 B2 NAME), one path per line,
225 # inner paths first. Innermost name can be ':' if the head is
226 # not in sync with the base or '%' if the head is not in sync
227 # with the remote (in this order of priority).
228 # It will also return non-zero status if NAME needs update.
229 # If needs_update() hits missing dependencies, it will append
230 # them to space-separated $missing_deps list and skip them.
233 recurse_deps branch_needs_update
"$@"
239 [ -z "$(git diff-tree "refs
/top-bases
/$1" "$1" -- | fgrep -v " .top
")" ]
245 git for-each-ref refs
/top-bases |
246 while read rev type ref
; do
247 name
="${ref#refs/top-bases/}"
248 if branch_annihilated
"$name"; then
252 git cat-file blob
"$name:.topdeps" |
while read dep
; do
254 ref_exists
"refs/top-bases/$dep" ||
256 if ! "$dep_is_tgish" ||
! branch_annihilated
$dep; then
263 # switch_to_base NAME [SEED]
266 _base
="refs/top-bases/$1"; _seed
="$2"
267 # We have to do all the hard work ourselves :/
268 # This is like git checkout -b "$_base" "$_seed"
269 # (or just git checkout "$_base"),
270 # but does not create a detached HEAD.
271 git read-tree
-u -m HEAD
"${_seed:-$_base}"
272 [ -z "$_seed" ] || git update-ref
"$_base" "$_seed"
273 git symbolic-ref HEAD
"$_base"
276 # Show the help messages.
279 if [ -z "$1" ] ; then
280 # This is currently invoked in all kinds of circumstances,
281 # including when the user made a usage error. Should we end up
282 # providing more than a short help message, then we should
284 # Petr's comment: http://marc.info/?l=git&m=122718711327376&w=2
286 ## Build available commands list for help output
290 for cmd
in "@cmddir@"/tg-
*; do
291 ! [ -r "$cmd" ] && continue
292 # strip directory part and "tg-" prefix
293 cmd
="$(basename "$cmd")"
299 echo "TopGit v$TG_VERSION - A different patch queue manager"
300 echo "Usage: tg [-r REMOTE] ($cmds|help) ..."
301 elif [ -r "@cmddir@"/tg-
$1 ] ; then
303 @cmddir@
/tg-
$1 -h 2>&1 ||
:
305 if [ -r "@sharedir@/tg-$1.txt" ] ; then
306 cat "@sharedir@/tg-$1.txt"
309 echo "`basename $0`: no help for $1" 1>&2
324 # Spawn pager process and redirect the rest of our output to it
329 # TG_PAGER = GIT_PAGER | PAGER | less
330 # NOTE: GIT_PAGER='' is significant
331 TG_PAGER
=${GIT_PAGER-${PAGER-less}}
333 [ -z "$TG_PAGER" -o "$TG_PAGER" = "cat" ] && return 0
337 export LESS
="${LESS:-FRSX}" # as in pager.c:pager_preexec()
339 _pager_fifo_dir
="$(mktemp -t -d tg-pager-fifo.XXXXXX)"
340 _pager_fifo
="$_pager_fifo_dir/0"
341 mkfifo -m 600 "$_pager_fifo"
343 "$TG_PAGER" < "$_pager_fifo" &
344 exec > "$_pager_fifo" # dup2(pager_fifo.in, 1)
346 # this is needed so e.g. `git diff` will still colorize it's output if
347 # requested in ~/.gitconfig with color.diff=auto
348 export GIT_PAGER_IN_USE
=1
350 # atexit(close(1); wait pager)
351 trap "exec >&-; rm \"$_pager_fifo\"; rmdir \"$_pager_fifo_dir\"; wait" EXIT
357 die
"No command directory: '@cmddir@'"
362 git_dir
="$(git rev-parse --git-dir)"
363 root_dir
="$(git rev-parse --show-cdup)"; root_dir
="${root_dir:-.}"
364 # Make sure root_dir doesn't end with a trailing slash.
365 root_dir
="${root_dir%/}"
366 base_remote
="$(git config topgit.remote 2>/dev/null)" ||
:
368 # make sure merging the .top* files will always behave sanely
370 setup_hook
"pre-commit"
374 # We were sourced from another script for our utility functions;
375 # this is set by hooks. Skip the rest of the file. A simple return doesn't
376 # work as expected in every shell. See http://bugs.debian.org/516188
377 if [ -z "$tg__include" ]; then
379 if [ "$1" = "-r" ]; then
382 echo "Option -r requires an argument." >&2
386 base_remote
="$1"; shift
387 tg
="$tg -r $base_remote"
391 [ -n "$cmd" ] ||
{ do_help
; exit 1; }
402 [ -r "@cmddir@"/tg-
$cmd ] ||
{
403 echo "Unknown subcommand: $cmd" >&2
407 .
"@cmddir@"/tg-
$cmd;;