exit 1
}
-# cat_file "topic:file"
-# Like `git cat-file blob $1`, but topics '(i)' and '(w)' means index and worktree
+# Make sure we are in the worktree, not under .git; die otherwise
+ensure_git_repo_or_die()
+{
+ local is_inside_repo is_inside_git_dir
+ is_inside_repo=1
+ is_inside_git_dir=$(git rev-parse --is-inside-git-dir 2>/dev/null) ||
+ is_inside_repo=0
+
+ case "$is_inside_repo/$is_inside_git_dir" in
+ 0*) die "Cannot run outside of a Git repository.";;
+ 1/true) die "Cannot run from inside \`.git\` hierarchy, please switch to work-tree.";;
+ esac
+}
+
+# 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):'*)
- cat "${arg#(w):}"
+ path="$1"
+ case "${2-}" in
+ -w)
+ cat "$root_dir/${path#*:}"
;;
- '(i):'*)
+ -i)
# ':file' means cat from index
- git cat-file blob "${arg#(i)}"
+ git cat-file blob ":${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" ${2-})" ]
}
-# list_deps
+# list_deps [-i | -w]
+# -i/-w apply only to HEAD
list_deps()
{
+ local head
+ local head_from
+ local from
+ head_from=${1-}
+ head="$(git symbolic-ref -q HEAD)" ||
+ head="..detached.."
+
git for-each-ref refs/top-bases |
while read rev type ref; do
name="${ref#refs/top-bases/}"
continue;
fi
- git cat-file blob "$name:.topdeps" | while read dep; do
+ from=$head_from
+ [ "refs/heads/$name" = "$head" ] ||
+ from=
+ cat_file "$name:.topdeps" $from | while read dep; do
dep_is_tgish=true
ref_exists "refs/top-bases/$dep" ||
dep_is_tgish=false
# 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/$1.XXXXXX"
}
## Startup
[ -d "@cmddir@" ] ||
die "No command directory: '@cmddir@'"
+ensure_git_repo_or_die
+
## Initial setup
set -e
# make sure merging the .top* files will always behave sanely
setup_ours
setup_hook "pre-commit"
+# create global temporary directories, inside GIT_DIR
+tg_tmp_dir="$(mktemp -d "$git_dir/tg-tmp.XXXXXX")"
+trap "rm -rf \"$tg_tmp_dir\"" EXIT
## Dispatch
~ian / topgit.git / blobdiff