exit 1
}
-# cat_file "topic:file"
-# Like `git cat-file blob $1`, but topics '(i)' and '(w)' means index and worktree
+# cat_file TOPIC:PATH [FROM]
+# cat the file PATH from branch TOPIC when FROM is empty.
+# FROM can be -i or -w, than the file will be from the index or worktree,
+# respectively. The caller should than ensure that HEAD is TOPIC, to make sense.
cat_file()
{
- arg="$1"
- case "$arg" in
- '(w):'*)
- arg=$(echo "$arg" | tail --bytes=+5)
- cat "$arg"
- return
+ path="$1"
+ case "${2-}" in
+ -w)
+ cat "$root_dir/${path#*:}"
;;
- '(i):'*)
+ -i)
# ':file' means cat from index
- arg=$(echo "$arg" | tail --bytes=+5)
- git cat-file blob ":$arg"
+ git cat-file blob ":${path#*:}"
+ ;;
+ '')
+ git cat-file blob "$path"
;;
*)
- git cat-file blob "$arg"
+ die "Wrong argument to cat_file: '$2'"
+ ;;
esac
}
+# get tree for the committed topic
+get_tree_()
+{
+ echo "$1"
+}
+
+# get tree for the base
+get_tree_b()
+{
+ echo "refs/top-bases/$1"
+}
+
+# get tree for the index
+get_tree_i()
+{
+ git write-tree
+}
+
+# get tree for the worktree
+get_tree_w()
+{
+ i_tree=$(git write-tree)
+ (
+ # the file for --index-output needs to sit next to the
+ # current index file
+ : ${GIT_INDEX_FILE:="$git_dir/index"}
+ TMP_INDEX="$(mktemp "${GIT_INDEX_FILE}-tg.XXXXXX")"
+ git read-tree -m $i_tree --index-output="$TMP_INDEX" &&
+ GIT_INDEX_FILE="$TMP_INDEX" &&
+ export GIT_INDEX_FILE &&
+ git diff --name-only -z HEAD |
+ git update-index -z --add --remove --stdin &&
+ git write-tree &&
+ rm -f "$TMP_INDEX"
+ )
+}
+
+# pretty_tree NAME [-b | -i | -w]
+# Output tree ID of a cleaned-up tree without tg's artifacts.
+# NAME will be ignored for -i and -w, but needs to be present
+pretty_tree()
+{
+ name=$1
+ source=${2#?}
+ git ls-tree --full-tree "$(get_tree_$source "$name")" |
+ awk -F ' ' '$2 !~ /^.top/' |
+ git mktree
+}
+
# setup_hook NAME
setup_hook()
{
_name="$1"; # no shift
_depchain="$*"
- _depsfile="$(mktemp -t tg-depsfile.XXXXXX)"
+ _depsfile="$(get_temp tg-depsfile)"
# If no_remotes is unset check also our base against remote base.
# Checking our head against remote head has to be done in the helper.
if test -z "$no_remotes" && has_remote "top-bases/$_name"; then
eval "$_cmd"
done <"$_depsfile"
missing_deps="${missing_deps# }"
- rm "$_depsfile"
return $_ret
}
recurse_deps branch_needs_update "$@"
}
-# branch_empty NAME
+# branch_empty NAME [-i | -w]
branch_empty()
{
- [ -z "$(git diff-tree "refs/top-bases/$1" "$1" -- | fgrep -v " .top")" ]
+ [ "$(pretty_tree "$1" -b)" = "$(pretty_tree "$1" ${2-})" ]
}
# list_deps
# now spawn pager
export LESS="${LESS:-FRSX}" # as in pager.c:pager_preexec()
- _pager_fifo_dir="$(mktemp -t -d tg-pager-fifo.XXXXXX)"
- _pager_fifo="$_pager_fifo_dir/0"
- mkfifo -m 600 "$_pager_fifo"
+ # setup_pager should be called only once per command
+ pager_fifo="$tg_tmp_dir/pager"
+ mkfifo -m 600 "$pager_fifo"
- "$TG_PAGER" < "$_pager_fifo" &
- exec > "$_pager_fifo" # dup2(pager_fifo.in, 1)
+ "$TG_PAGER" < "$pager_fifo" &
+ exec > "$pager_fifo" # dup2(pager_fifo.in, 1)
# this is needed so e.g. `git diff` will still colorize it's output if
# requested in ~/.gitconfig with color.diff=auto
export GIT_PAGER_IN_USE=1
# atexit(close(1); wait pager)
- trap "exec >&-; rm \"$_pager_fifo\"; rmdir \"$_pager_fifo_dir\"; wait" EXIT
+ # deliberately overwrites the global EXIT trap
+ trap "exec >&-; rm -rf \"$tg_tmp_dir\"; wait" EXIT
+}
+
+# get_temp NAME [-d]
+# creates a new temporary file (or directory with -d) in the global
+# temporary directory $tg_tmp_dir with pattern prefix NAME
+get_temp()
+{
+ mktemp ${2-} "$tg_tmp_dir/$1.XXXXXX"
}
## Startup
# make sure merging the .top* files will always behave sanely
setup_ours
setup_hook "pre-commit"
+# create global temporary directories, inside GIT_DIR
+tg_tmp_dir="$(mktemp -d "$git_dir/tg-tmp.XXXXXX")"
+trap "rm -rf \"$tg_tmp_dir\"" EXIT
## Dispatch