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-rwxr-xr-xcontrib/subtree/git-subtree.sh642
1 files changed, 382 insertions, 260 deletions
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 868e18b9a1..b06782bc79 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -4,208 +4,261 @@
#
# Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>
#
-if test $# -eq 0
+
+if test -z "$GIT_EXEC_PATH" || test "${PATH#"${GIT_EXEC_PATH}:"}" = "$PATH" || ! test -f "$GIT_EXEC_PATH/git-sh-setup"
then
- set -- -h
+ echo >&2 'It looks like either your git installation or your'
+ echo >&2 'git-subtree installation is broken.'
+ echo >&2
+ echo >&2 "Tips:"
+ echo >&2 " - If \`git --exec-path\` does not print the correct path to"
+ echo >&2 " your git install directory, then set the GIT_EXEC_PATH"
+ echo >&2 " environment variable to the correct directory."
+ echo >&2 " - Make sure that your \`${0##*/}\` file is either in your"
+ echo >&2 " PATH or in your git exec path (\`$(git --exec-path)\`)."
+ echo >&2 " - You should run git-subtree as \`git ${0##*/git-}\`,"
+ echo >&2 " not as \`${0##*/}\`." >&2
+ exit 126
fi
+
OPTS_SPEC="\
git subtree add --prefix=<prefix> <commit>
git subtree add --prefix=<prefix> <repository> <ref>
git subtree merge --prefix=<prefix> <commit>
+git subtree split --prefix=<prefix> [<commit>]
git subtree pull --prefix=<prefix> <repository> <ref>
-git subtree push --prefix=<prefix> <repository> <ref>
-git subtree split --prefix=<prefix> <commit>
+git subtree push --prefix=<prefix> <repository> <refspec>
--
h,help show the help
q quiet
d show debug messages
P,prefix= the name of the subdir to split out
-m,message= use the given message as the commit message for the merge commit
- options for 'split'
+ options for 'split' (also: 'push')
annotate= add a prefix to commit message of new commits
b,branch= create a new branch from the split subtree
ignore-joins ignore prior --rejoin commits
onto= try connecting new tree to an existing one
rejoin merge the new branch back into HEAD
- options for 'add', 'merge', and 'pull'
+ options for 'add' and 'merge' (also: 'pull', 'split --rejoin', and 'push --rejoin')
squash merge subtree changes as a single commit
+m,message= use the given message as the commit message for the merge commit
"
-eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
-PATH=$PATH:$(git --exec-path)
-. git-sh-setup
-
-require_work_tree
-
-quiet=
-branch=
-debug=
-command=
-onto=
-rejoin=
-ignore_joins=
-annotate=
-squash=
-message=
-prefix=
+indent=0
+# Usage: debug [MSG...]
debug () {
- if test -n "$debug"
- then
- printf "%s\n" "$*" >&2
- fi
-}
-
-say () {
- if test -z "$quiet"
+ if test -n "$arg_debug"
then
- printf "%s\n" "$*" >&2
+ printf "%$(($indent * 2))s%s\n" '' "$*" >&2
fi
}
+# Usage: progress [MSG...]
progress () {
- if test -z "$quiet"
+ if test -z "$GIT_QUIET"
then
- printf "%s\r" "$*" >&2
+ if test -z "$arg_debug"
+ then
+ # Debug mode is off.
+ #
+ # Print one progress line that we keep updating (use
+ # "\r" to return to the beginning of the line, rather
+ # than "\n" to start a new line). This only really
+ # works when stderr is a terminal.
+ printf "%s\r" "$*" >&2
+ else
+ # Debug mode is on. The `debug` function is regularly
+ # printing to stderr.
+ #
+ # Don't do the one-line-with-"\r" thing, because on a
+ # terminal the debug output would overwrite and hide the
+ # progress output. Add a "progress:" prefix to make the
+ # progress output and the debug output easy to
+ # distinguish. This ensures maximum readability whether
+ # stderr is a terminal or a file.
+ printf "progress: %s\n" "$*" >&2
+ fi
fi
}
+# Usage: assert CMD...
assert () {
if ! "$@"
then
- die "assertion failed: " "$@"
+ die "assertion failed: $*"
fi
}
-ensure_single_rev () {
- if test $# -ne 1
+main () {
+ if test $# -eq 0
then
- die "You must provide exactly one revision. Got: '$@'"
+ set -- -h
fi
-}
-
-while test $# -gt 0
-do
- opt="$1"
- shift
+ set_args="$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
+ eval "$set_args"
+ . git-sh-setup
+ require_work_tree
- case "$opt" in
- -q)
- quiet=1
- ;;
- -d)
- debug=1
- ;;
- --annotate)
- annotate="$1"
- shift
- ;;
- --no-annotate)
- annotate=
- ;;
- -b)
- branch="$1"
- shift
- ;;
- -P)
- prefix="${1%/}"
+ # First figure out the command and whether we use --rejoin, so
+ # that we can provide more helpful validation when we do the
+ # "real" flag parsing.
+ arg_split_rejoin=
+ allow_split=
+ allow_addmerge=
+ while test $# -gt 0
+ do
+ opt="$1"
shift
+ case "$opt" in
+ --annotate|-b|-P|-m|--onto)
+ shift
+ ;;
+ --rejoin)
+ arg_split_rejoin=1
+ ;;
+ --no-rejoin)
+ arg_split_rejoin=
+ ;;
+ --)
+ break
+ ;;
+ esac
+ done
+ arg_command=$1
+ case "$arg_command" in
+ add|merge|pull)
+ allow_addmerge=1
;;
- -m)
- message="$1"
- shift
+ split|push)
+ allow_split=1
+ allow_addmerge=$arg_split_rejoin
;;
- --no-prefix)
- prefix=
+ *)
+ die "Unknown command '$arg_command'"
;;
- --onto)
- onto="$1"
+ esac
+ # Reset the arguments array for "real" flag parsing.
+ eval "$set_args"
+
+ # Begin "real" flag parsing.
+ arg_debug=
+ arg_prefix=
+ arg_split_branch=
+ arg_split_onto=
+ arg_split_ignore_joins=
+ arg_split_annotate=
+ arg_addmerge_squash=
+ arg_addmerge_message=
+ while test $# -gt 0
+ do
+ opt="$1"
shift
- ;;
- --no-onto)
- onto=
- ;;
- --rejoin)
- rejoin=1
- ;;
- --no-rejoin)
- rejoin=
- ;;
- --ignore-joins)
- ignore_joins=1
- ;;
- --no-ignore-joins)
- ignore_joins=
- ;;
- --squash)
- squash=1
- ;;
- --no-squash)
- squash=
- ;;
- --)
- break
+
+ case "$opt" in
+ -q)
+ GIT_QUIET=1
+ ;;
+ -d)
+ arg_debug=1
+ ;;
+ --annotate)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_annotate="$1"
+ shift
+ ;;
+ --no-annotate)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_annotate=
+ ;;
+ -b)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_branch="$1"
+ shift
+ ;;
+ -P)
+ arg_prefix="${1%/}"
+ shift
+ ;;
+ -m)
+ test -n "$allow_addmerge" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_addmerge_message="$1"
+ shift
+ ;;
+ --no-prefix)
+ arg_prefix=
+ ;;
+ --onto)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_onto="$1"
+ shift
+ ;;
+ --no-onto)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_onto=
+ ;;
+ --rejoin)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ ;;
+ --no-rejoin)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ ;;
+ --ignore-joins)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_ignore_joins=1
+ ;;
+ --no-ignore-joins)
+ test -n "$allow_split" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_split_ignore_joins=
+ ;;
+ --squash)
+ test -n "$allow_addmerge" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_addmerge_squash=1
+ ;;
+ --no-squash)
+ test -n "$allow_addmerge" || die "The '$opt' flag does not make sense with 'git subtree $arg_command'."
+ arg_addmerge_squash=
+ ;;
+ --)
+ break
+ ;;
+ *)
+ die "Unexpected option: $opt"
+ ;;
+ esac
+ done
+ shift
+
+ if test -z "$arg_prefix"
+ then
+ die "You must provide the --prefix option."
+ fi
+
+ case "$arg_command" in
+ add)
+ test -e "$arg_prefix" &&
+ die "prefix '$arg_prefix' already exists."
;;
*)
- die "Unexpected option: $opt"
+ test -e "$arg_prefix" ||
+ die "'$arg_prefix' does not exist; use 'git subtree add'"
;;
esac
-done
-
-command="$1"
-shift
-
-case "$command" in
-add|merge|pull)
- default=
- ;;
-split|push)
- default="--default HEAD"
- ;;
-*)
- die "Unknown command '$command'"
- ;;
-esac
-
-if test -z "$prefix"
-then
- die "You must provide the --prefix option."
-fi
-case "$command" in
-add)
- test -e "$prefix" &&
- die "prefix '$prefix' already exists."
- ;;
-*)
- test -e "$prefix" ||
- die "'$prefix' does not exist; use 'git subtree add'"
- ;;
-esac
-
-dir="$(dirname "$prefix/.")"
-
-if test "$command" != "pull" &&
- test "$command" != "add" &&
- test "$command" != "push"
-then
- revs=$(git rev-parse $default --revs-only "$@") || exit $?
- dirs=$(git rev-parse --no-revs --no-flags "$@") || exit $?
- ensure_single_rev $revs
- if test -n "$dirs"
- then
- die "Error: Use --prefix instead of bare filenames."
- fi
-fi
+ dir="$(dirname "$arg_prefix/.")"
-debug "command: {$command}"
-debug "quiet: {$quiet}"
-debug "revs: {$revs}"
-debug "dir: {$dir}"
-debug "opts: {$*}"
-debug
+ debug "command: {$arg_command}"
+ debug "quiet: {$GIT_QUIET}"
+ debug "dir: {$dir}"
+ debug "opts: {$*}"
+ debug
+
+ "cmd_$arg_command" "$@"
+}
+# Usage: cache_setup
cache_setup () {
+ assert test $# = 0
cachedir="$GIT_DIR/subtree-cache/$$"
rm -rf "$cachedir" ||
die "Can't delete old cachedir: $cachedir"
@@ -216,6 +269,7 @@ cache_setup () {
debug "Using cachedir: $cachedir" >&2
}
+# Usage: cache_get [REVS...]
cache_get () {
for oldrev in "$@"
do
@@ -227,6 +281,7 @@ cache_get () {
done
}
+# Usage: cache_miss [REVS...]
cache_miss () {
for oldrev in "$@"
do
@@ -237,24 +292,30 @@ cache_miss () {
done
}
+# Usage: check_parents PARENTS_EXPR
check_parents () {
- missed=$(cache_miss "$1")
- local indent=$(($2 + 1))
+ assert test $# = 1
+ missed=$(cache_miss "$1") || exit $?
+ local indent=$(($indent + 1))
for miss in $missed
do
if ! test -r "$cachedir/notree/$miss"
then
- debug " incorrect order: $miss"
- process_split_commit "$miss" "" "$indent"
+ debug "incorrect order: $miss"
+ process_split_commit "$miss" ""
fi
done
}
+# Usage: set_notree REV
set_notree () {
+ assert test $# = 1
echo "1" > "$cachedir/notree/$1"
}
+# Usage: cache_set OLDREV NEWREV
cache_set () {
+ assert test $# = 2
oldrev="$1"
newrev="$2"
if test "$oldrev" != "latest_old" &&
@@ -266,7 +327,9 @@ cache_set () {
echo "$newrev" >"$cachedir/$oldrev"
}
+# Usage: rev_exists REV
rev_exists () {
+ assert test $# = 1
if git rev-parse "$1" >/dev/null 2>&1
then
return 0
@@ -275,32 +338,25 @@ rev_exists () {
fi
}
-rev_is_descendant_of_branch () {
- newrev="$1"
- branch="$2"
- branch_hash=$(git rev-parse "$branch")
- match=$(git rev-list -1 "$branch_hash" "^$newrev")
-
- if test -z "$match"
- then
- return 0
- else
- return 1
- fi
-}
-
-# if a commit doesn't have a parent, this might not work. But we only want
+# Usage: try_remove_previous REV
+#
+# If a commit doesn't have a parent, this might not work. But we only want
# to remove the parent from the rev-list, and since it doesn't exist, it won't
# be there anyway, so do nothing in that case.
try_remove_previous () {
+ assert test $# = 1
if rev_exists "$1^"
then
echo "^$1^"
fi
}
+# Usage: find_latest_squash DIR
find_latest_squash () {
+ assert test $# = 1
debug "Looking for latest squash ($dir)..."
+ local indent=$(($indent + 1))
+
dir="$1"
sq=
main=
@@ -319,7 +375,7 @@ find_latest_squash () {
main="$b"
;;
git-subtree-split:)
- sub="$(git rev-parse "$b^0")" ||
+ sub="$(git rev-parse "$b^{commit}")" ||
die "could not rev-parse split hash $b from commit $sq"
;;
END)
@@ -329,7 +385,8 @@ find_latest_squash () {
then
# a rejoin commit?
# Pretend its sub was a squash.
- sq="$sub"
+ sq=$(git rev-parse --verify "$sq^2") ||
+ die
fi
debug "Squash found: $sq $sub"
echo "$sq" "$sub"
@@ -340,22 +397,26 @@ find_latest_squash () {
sub=
;;
esac
- done
+ done || exit $?
}
+# Usage: find_existing_splits DIR REV
find_existing_splits () {
+ assert test $# = 2
debug "Looking for prior splits..."
+ local indent=$(($indent + 1))
+
dir="$1"
- revs="$2"
+ rev="$2"
main=
sub=
local grep_format="^git-subtree-dir: $dir/*\$"
- if test -n "$ignore_joins"
+ if test -n "$arg_split_ignore_joins"
then
grep_format="^Add '$dir/' from commit '"
fi
git log --grep="$grep_format" \
- --no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' $revs |
+ --no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' "$rev" |
while read a b junk
do
case "$a" in
@@ -366,11 +427,11 @@ find_existing_splits () {
main="$b"
;;
git-subtree-split:)
- sub="$(git rev-parse "$b^0")" ||
+ sub="$(git rev-parse "$b^{commit}")" ||
die "could not rev-parse split hash $b from commit $sq"
;;
END)
- debug " Main is: '$main'"
+ debug "Main is: '$main'"
if test -z "$main" -a -n "$sub"
then
# squash commits refer to a subtree
@@ -389,10 +450,12 @@ find_existing_splits () {
sub=
;;
esac
- done
+ done || exit $?
}
+# Usage: copy_commit REV TREE FLAGS_STR
copy_commit () {
+ assert test $# = 3
# We're going to set some environment vars here, so
# do it in a subshell to get rid of them safely later
debug copy_commit "{$1}" "{$2}" "{$3}"
@@ -411,23 +474,32 @@ copy_commit () {
GIT_COMMITTER_EMAIL \
GIT_COMMITTER_DATE
(
- printf "%s" "$annotate"
+ printf "%s" "$arg_split_annotate"
cat
) |
git commit-tree "$2" $3 # reads the rest of stdin
) || die "Can't copy commit $1"
}
+# Usage: add_msg DIR LATEST_OLD LATEST_NEW
add_msg () {
+ assert test $# = 3
dir="$1"
latest_old="$2"
latest_new="$3"
- if test -n "$message"
+ if test -n "$arg_addmerge_message"
then
- commit_message="$message"
+ commit_message="$arg_addmerge_message"
else
commit_message="Add '$dir/' from commit '$latest_new'"
fi
+ if test -n "$arg_split_rejoin"
+ then
+ # If this is from a --rejoin, then rejoin_msg has
+ # already inserted the `git-subtree-xxx:` tags
+ echo "$commit_message"
+ return
+ fi
cat <<-EOF
$commit_message
@@ -437,22 +509,26 @@ add_msg () {
EOF
}
+# Usage: add_squashed_msg REV DIR
add_squashed_msg () {
- if test -n "$message"
+ assert test $# = 2
+ if test -n "$arg_addmerge_message"
then
- echo "$message"
+ echo "$arg_addmerge_message"
else
echo "Merge commit '$1' as '$2'"
fi
}
+# Usage: rejoin_msg DIR LATEST_OLD LATEST_NEW
rejoin_msg () {
+ assert test $# = 3
dir="$1"
latest_old="$2"
latest_new="$3"
- if test -n "$message"
+ if test -n "$arg_addmerge_message"
then
- commit_message="$message"
+ commit_message="$arg_addmerge_message"
else
commit_message="Split '$dir/' into commit '$latest_new'"
fi
@@ -465,7 +541,9 @@ rejoin_msg () {
EOF
}
+# Usage: squash_msg DIR OLD_SUBTREE_COMMIT NEW_SUBTREE_COMMIT
squash_msg () {
+ assert test $# = 3
dir="$1"
oldsub="$2"
newsub="$3"
@@ -487,12 +565,16 @@ squash_msg () {
echo "git-subtree-split: $newsub"
}
+# Usage: toptree_for_commit COMMIT
toptree_for_commit () {
+ assert test $# = 1
commit="$1"
git rev-parse --verify "$commit^{tree}" || exit $?
}
+# Usage: subtree_for_commit COMMIT DIR
subtree_for_commit () {
+ assert test $# = 2
commit="$1"
dir="$2"
git ls-tree "$commit" -- "$dir" |
@@ -503,17 +585,19 @@ subtree_for_commit () {
test "$type" = "commit" && continue # ignore submodules
echo $tree
break
- done
+ done || exit $?
}
+# Usage: tree_changed TREE [PARENTS...]
tree_changed () {
+ assert test $# -gt 0
tree=$1
shift
if test $# -ne 1
then
return 0 # weird parents, consider it changed
else
- ptree=$(toptree_for_commit $1)
+ ptree=$(toptree_for_commit $1) || exit $?
if test "$ptree" != "$tree"
then
return 0 # changed
@@ -523,7 +607,9 @@ tree_changed () {
fi
}
+# Usage: new_squash_commit OLD_SQUASHED_COMMIT OLD_NONSQUASHED_COMMIT NEW_NONSQUASHED_COMMIT
new_squash_commit () {
+ assert test $# = 3
old="$1"
oldsub="$2"
newsub="$3"
@@ -538,7 +624,9 @@ new_squash_commit () {
fi
}
+# Usage: copy_or_skip REV TREE NEWPARENTS
copy_or_skip () {
+ assert test $# = 3
rev="$1"
tree="$2"
newparents="$3"
@@ -613,7 +701,9 @@ copy_or_skip () {
fi
}
+# Usage: ensure_clean
ensure_clean () {
+ assert test $# = 0
if ! git diff-index HEAD --exit-code --quiet 2>&1
then
die "Working tree has modifications. Cannot add."
@@ -624,15 +714,18 @@ ensure_clean () {
fi
}
+# Usage: ensure_valid_ref_format REF
ensure_valid_ref_format () {
+ assert test $# = 1
git check-ref-format "refs/heads/$1" ||
die "'$1' does not look like a ref"
}
+# Usage: process_split_commit REV PARENTS
process_split_commit () {
+ assert test $# = 2
local rev="$1"
local parents="$2"
- local indent=$3
if test $indent -eq 0
then
@@ -647,20 +740,21 @@ process_split_commit () {
progress "$revcount/$revmax ($createcount) [$extracount]"
debug "Processing commit: $rev"
- exists=$(cache_get "$rev")
+ local indent=$(($indent + 1))
+ exists=$(cache_get "$rev") || exit $?
if test -n "$exists"
then
- debug " prior: $exists"
+ debug "prior: $exists"
return
fi
createcount=$(($createcount + 1))
- debug " parents: $parents"
- check_parents "$parents" "$indent"
- newparents=$(cache_get $parents)
- debug " newparents: $newparents"
+ debug "parents: $parents"
+ check_parents "$parents"
+ newparents=$(cache_get $parents) || exit $?
+ debug "newparents: $newparents"
- tree=$(subtree_for_commit "$rev" "$dir")
- debug " tree is: $tree"
+ tree=$(subtree_for_commit "$rev" "$dir") || exit $?
+ debug "tree is: $tree"
# ugly. is there no better way to tell if this is a subtree
# vs. a mainline commit? Does it matter?
@@ -675,17 +769,15 @@ process_split_commit () {
fi
newrev=$(copy_or_skip "$rev" "$tree" "$newparents") || exit $?
- debug " newrev is: $newrev"
+ debug "newrev is: $newrev"
cache_set "$rev" "$newrev"
cache_set latest_new "$newrev"
cache_set latest_old "$rev"
}
+# Usage: cmd_add REV
+# Or: cmd_add REPOSITORY REF
cmd_add () {
- if test -e "$dir"
- then
- die "'$dir' already exists. Cannot add."
- fi
ensure_clean
@@ -707,27 +799,35 @@ cmd_add () {
cmd_add_repository "$@"
else
- say "error: parameters were '$@'"
+ say >&2 "error: parameters were '$*'"
die "Provide either a commit or a repository and commit."
fi
}
+# Usage: cmd_add_repository REPOSITORY REFSPEC
cmd_add_repository () {
+ assert test $# = 2
echo "git fetch" "$@"
repository=$1
refspec=$2
git fetch "$@" || exit $?
- revs=FETCH_HEAD
- set -- $revs
- cmd_add_commit "$@"
+ cmd_add_commit FETCH_HEAD
}
+# Usage: cmd_add_commit REV
cmd_add_commit () {
- rev=$(git rev-parse $default --revs-only "$@") || exit $?
- ensure_single_rev $rev
+ # The rev has already been validated by cmd_add(), we just
+ # need to normalize it.
+ assert test $# = 1
+ rev=$(git rev-parse --verify "$1^{commit}") || exit $?
debug "Adding $dir as '$rev'..."
- git read-tree --prefix="$dir" $rev || exit $?
+ if test -z "$arg_split_rejoin"
+ then
+ # Only bother doing this if this is a genuine 'add',
+ # not a synthetic 'add' from '--rejoin'.
+ git read-tree --prefix="$dir" $rev || exit $?
+ fi
git checkout -- "$dir" || exit $?
tree=$(git write-tree) || exit $?
@@ -739,44 +839,61 @@ cmd_add_commit () {
headp=
fi
- if test -n "$squash"
+ if test -n "$arg_addmerge_squash"
then
rev=$(new_squash_commit "" "" "$rev") || exit $?
commit=$(add_squashed_msg "$rev" "$dir" |
git commit-tree "$tree" $headp -p "$rev") || exit $?
else
- revp=$(peel_committish "$rev") &&
+ revp=$(peel_committish "$rev") || exit $?
commit=$(add_msg "$dir" $headrev "$rev" |
git commit-tree "$tree" $headp -p "$revp") || exit $?
fi
git reset "$commit" || exit $?
- say "Added dir '$dir'"
+ say >&2 "Added dir '$dir'"
}
+# Usage: cmd_split [REV]
cmd_split () {
+ if test $# -eq 0
+ then
+ rev=$(git rev-parse HEAD)
+ elif test $# -eq 1
+ then
+ rev=$(git rev-parse -q --verify "$1^{commit}") ||
+ die "'$1' does not refer to a commit"
+ else
+ die "You must provide exactly one revision. Got: '$*'"
+ fi
+
+ if test -n "$arg_split_rejoin"
+ then
+ ensure_clean
+ fi
+
debug "Splitting $dir..."
cache_setup || exit $?
- if test -n "$onto"
+ if test -n "$arg_split_onto"
then
- debug "Reading history for --onto=$onto..."
- git rev-list $onto |
+ debug "Reading history for --onto=$arg_split_onto..."
+ git rev-list $arg_split_onto |
while read rev
do
# the 'onto' history is already just the subdir, so
# any parent we find there can be used verbatim
- debug " cache: $rev"
+ debug "cache: $rev"
cache_set "$rev" "$rev"
- done
+ done || exit $?
fi
- unrevs="$(find_existing_splits "$dir" "$revs")"
+ unrevs="$(find_existing_splits "$dir" "$rev")" || exit $?
# We can't restrict rev-list to only $dir here, because some of our
# parents have the $dir contents the root, and those won't match.
# (and rev-list --follow doesn't seem to solve this)
- grl='git rev-list --topo-order --reverse --parents $revs $unrevs'
+ grl='git rev-list --topo-order --reverse --parents $rev $unrevs'
revmax=$(eval "$grl" | wc -l)
revcount=0
createcount=0
@@ -784,52 +901,58 @@ cmd_split () {
eval "$grl" |
while read rev parents
do
- process_split_commit "$rev" "$parents" 0
+ process_split_commit "$rev" "$parents"
done || exit $?
- latest_new=$(cache_get latest_new)
+ latest_new=$(cache_get latest_new) || exit $?
if test -z "$latest_new"
then
die "No new revisions were found"
fi
- if test -n "$rejoin"
+ if test -n "$arg_split_rejoin"
then
debug "Merging split branch into HEAD..."
- latest_old=$(cache_get latest_old)
- git merge -s ours \
- --allow-unrelated-histories \
- -m "$(rejoin_msg "$dir" "$latest_old" "$latest_new")" \
- "$latest_new" >&2 || exit $?
+ latest_old=$(cache_get latest_old) || exit $?
+ arg_addmerge_message="$(rejoin_msg "$dir" "$latest_old" "$latest_new")" || exit $?
+ if test -z "$(find_latest_squash "$dir")"
+ then
+ cmd_add "$latest_new" >&2 || exit $?
+ else
+ cmd_merge "$latest_new" >&2 || exit $?
+ fi
fi
- if test -n "$branch"
+ if test -n "$arg_split_branch"
then
- if rev_exists "refs/heads/$branch"
+ if rev_exists "refs/heads/$arg_split_branch"
then
- if ! rev_is_descendant_of_branch "$latest_new" "$branch"
+ if ! git merge-base --is-ancestor "$arg_split_branch" "$latest_new"
then
- die "Branch '$branch' is not an ancestor of commit '$latest_new'."
+ die "Branch '$arg_split_branch' is not an ancestor of commit '$latest_new'."
fi
action='Updated'
else
action='Created'
fi
git update-ref -m 'subtree split' \
- "refs/heads/$branch" "$latest_new" || exit $?
- say "$action branch '$branch'"
+ "refs/heads/$arg_split_branch" "$latest_new" || exit $?
+ say >&2 "$action branch '$arg_split_branch'"
fi
echo "$latest_new"
exit 0
}
+# Usage: cmd_merge REV
cmd_merge () {
- rev=$(git rev-parse $default --revs-only "$@") || exit $?
- ensure_single_rev $rev
+ test $# -eq 1 ||
+ die "You must provide exactly one revision. Got: '$*'"
+ rev=$(git rev-parse -q --verify "$1^{commit}") ||
+ die "'$1' does not refer to a commit"
ensure_clean
- if test -n "$squash"
+ if test -n "$arg_addmerge_squash"
then
- first_split="$(find_latest_squash "$dir")"
+ first_split="$(find_latest_squash "$dir")" || exit $?
if test -z "$first_split"
then
die "Can't squash-merge: '$dir' was never added."
@@ -839,7 +962,7 @@ cmd_merge () {
sub=$2
if test "$sub" = "$rev"
then
- say "Subtree is already at commit $rev."
+ say >&2 "Subtree is already at commit $rev."
exit 0
fi
new=$(new_squash_commit "$old" "$sub" "$rev") || exit $?
@@ -847,26 +970,16 @@ cmd_merge () {
rev="$new"
fi
- version=$(git version)
- if test "$version" \< "git version 1.7"
+ if test -n "$arg_addmerge_message"
then
- if test -n "$message"
- then
- git merge -s subtree --message="$message" "$rev"
- else
- git merge -s subtree "$rev"
- fi
+ git merge -Xsubtree="$arg_prefix" \
+ --message="$arg_addmerge_message" "$rev"
else
- if test -n "$message"
- then
- git merge -Xsubtree="$prefix" \
- --message="$message" "$rev"
- else
- git merge -Xsubtree="$prefix" $rev
- fi
+ git merge -Xsubtree="$arg_prefix" $rev
fi
}
+# Usage: cmd_pull REPOSITORY REMOTEREF
cmd_pull () {
if test $# -ne 2
then
@@ -875,27 +988,36 @@ cmd_pull () {
ensure_clean
ensure_valid_ref_format "$2"
git fetch "$@" || exit $?
- revs=FETCH_HEAD
- set -- $revs
- cmd_merge "$@"
+ cmd_merge FETCH_HEAD
}
+# Usage: cmd_push REPOSITORY [+][LOCALREV:]REMOTEREF
cmd_push () {
if test $# -ne 2
then
- die "You must provide <repository> <ref>"
+ die "You must provide <repository> <refspec>"
fi
- ensure_valid_ref_format "$2"
if test -e "$dir"
then
repository=$1
- refspec=$2
+ refspec=${2#+}
+ remoteref=${refspec#*:}
+ if test "$remoteref" = "$refspec"
+ then
+ localrevname_presplit=HEAD
+ else
+ localrevname_presplit=${refspec%%:*}
+ fi
+ ensure_valid_ref_format "$remoteref"
+ localrev_presplit=$(git rev-parse -q --verify "$localrevname_presplit^{commit}") ||
+ die "'$localrevname_presplit' does not refer to a commit"
+
echo "git push using: " "$repository" "$refspec"
- localrev=$(git subtree split --prefix="$prefix") || die
- git push "$repository" "$localrev":"refs/heads/$refspec"
+ localrev=$(cmd_split "$localrev_presplit") || die
+ git push "$repository" "$localrev":"refs/heads/$remoteref"
else
die "'$dir' must already exist. Try 'git subtree add'."
fi
}
-"cmd_$command" "$@"
+main "$@"
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 00:49:20 +0000