undef/git-commit-vandalism
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
4074d3c7e1
git-commit-vandalism/contrib/subtree/git-subtree.sh
Philippe Blain 1762382ab1 subtree: fix split after annotated tag was squashed merged 
The previous commit fixed a failure in 'git subtree merge --squash' when
the previous squash-merge merged an annotated tag of the subtree
repository which is missing locally.

The same failure happens in 'git subtree split', either directly or when
called by 'git subtree push', under the same circumstances: 'cmd_split'
invokes 'find_existing_splits', which loops through previous commits and
invokes 'git rev-parse' (via 'process_subtree_split_trailer') on the
value of any 'git subtree-split' trailer it finds. This fails if this
value is the hash of an annotated tag which is missing locally.

Add a new optional argument 'repository' to 'cmd_split' and
'find_existing_splits', and invoke 'cmd_split' with that argument from
'cmd_push'. This allows 'process_subtree_split_trailer' to try to fetch
the missing tag from the 'repository' if it's not available locally,
mirroring the new behaviour of 'git subtree pull' and 'git subtree
merge'.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-10-21 13:51:06 -07:00

1093 lines
24 KiB
Bash
Executable File
Raw Blame History

#!/bin/sh
#
# git-subtree.sh: split/join git repositories in subdirectories of this one
#
# Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>
#
if test -z "$GIT_EXEC_PATH" || ! test -f "$GIT_EXEC_PATH/git-sh-setup" || {
test "${PATH#"${GIT_EXEC_PATH}:"}" = "$PATH" &&
test ! "$GIT_EXEC_PATH" -ef "${PATH%%:*}" 2>/dev/null
}
then
basename=${0##*[/\\]}
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 \`$basename\` file is either in your"
echo >&2 " PATH or in your git exec path (\`$(git --exec-path)\`)."
echo >&2 " - You should run git-subtree as \`git ${basename#git-}\`,"
echo >&2 " not as \`$basename\`." >&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> <refspec>
--
h,help show the help
q quiet
d show debug messages
P,prefix= the name of the subdir to split out
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' 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
"
indent=0
# Usage: say [MSG...]
say () {
if test -z "$arg_quiet"
then
printf '%s\n' "$*"
fi
}
# Usage: debug [MSG...]
debug () {
if test -n "$arg_debug"
then
printf "%$(($indent * 2))s%s\n" '' "$*" >&2
fi
}
# Usage: progress [MSG...]
progress () {
if test -z "$arg_quiet"
then
if test -z "$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 "fatal: assertion failed: $*"
fi
}
# Usage: die_incompatible_opt OPTION COMMAND
die_incompatible_opt () {
assert test "$#" = 2
opt="$1"
arg_command="$2"
die "fatal: the '$opt' flag does not make sense with 'git subtree $arg_command'."
}
main () {
if test $# -eq 0
then
set -- -h
fi
set_args="$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
eval "$set_args"
. git-sh-setup
require_work_tree
# 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
;;
split|push)
allow_split=1
allow_addmerge=$arg_split_rejoin
;;
*)
die "fatal: unknown command '$arg_command'"
;;
esac
# Reset the arguments array for "real" flag parsing.
eval "$set_args"
# Begin "real" flag parsing.
arg_quiet=
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="$1"
shift
case "$opt" in
-q)
arg_quiet=1
;;
-d)
arg_debug=1
;;
--annotate)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_annotate="$1"
shift
;;
--no-annotate)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_annotate=
;;
-b)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_branch="$1"
shift
;;
-P)
arg_prefix="${1%/}"
shift
;;
-m)
test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
arg_addmerge_message="$1"
shift
;;
--no-prefix)
arg_prefix=
;;
--onto)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_onto="$1"
shift
;;
--no-onto)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_onto=
;;
--rejoin)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
;;
--no-rejoin)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
;;
--ignore-joins)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_ignore_joins=1
;;
--no-ignore-joins)
test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
arg_split_ignore_joins=
;;
--squash)
test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
arg_addmerge_squash=1
;;
--no-squash)
test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
arg_addmerge_squash=
;;
--)
break
;;
*)
die "fatal: unexpected option: $opt"
;;
esac
done
shift
if test -z "$arg_prefix"
then
die "fatal: you must provide the --prefix option."
fi
case "$arg_command" in
add)
test -e "$arg_prefix" &&
die "fatal: prefix '$arg_prefix' already exists."
;;
*)
test -e "$arg_prefix" ||
die "fatal: '$arg_prefix' does not exist; use 'git subtree add'"
;;
esac
dir="$(dirname "$arg_prefix/.")"
debug "command: {$arg_command}"
debug "quiet: {$arg_quiet}"
debug "dir: {$dir}"
debug "opts: {$*}"
debug
"cmd_$arg_command" "$@"
}
# Usage: cache_setup
cache_setup () {
assert test $# = 0
cachedir="$GIT_DIR/subtree-cache/$$"
rm -rf "$cachedir" ||
die "fatal: can't delete old cachedir: $cachedir"
mkdir -p "$cachedir" ||
die "fatal: can't create new cachedir: $cachedir"
mkdir -p "$cachedir/notree" ||
die "fatal: can't create new cachedir: $cachedir/notree"
debug "Using cachedir: $cachedir" >&2
}
# Usage: cache_get [REVS...]
cache_get () {
for oldrev in "$@"
do
if test -r "$cachedir/$oldrev"
then
read newrev <"$cachedir/$oldrev"
echo $newrev
fi
done
}
# Usage: cache_miss [REVS...]
cache_miss () {
for oldrev in "$@"
do
if ! test -r "$cachedir/$oldrev"
then
echo $oldrev
fi
done
}
# Usage: check_parents [REVS...]
check_parents () {
missed=$(cache_miss "$@") || 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" ""
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" &&
test "$oldrev" != "latest_new" &&
test -e "$cachedir/$oldrev"
then
die "fatal: cache for $oldrev already exists!"
fi
echo "$newrev" >"$cachedir/$oldrev"
}
# Usage: rev_exists REV
rev_exists () {
assert test $# = 1
if git rev-parse "$1" >/dev/null 2>&1
then
return 0
else
return 1
fi
}
# 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: process_subtree_split_trailer SPLIT_HASH MAIN_HASH [REPOSITORY]
process_subtree_split_trailer () {
assert test $# = 2 -o $# = 3
b="$1"
sq="$2"
repository=""
if test "$#" = 3
then
repository="$3"
fi
fail_msg="fatal: could not rev-parse split hash $b from commit $sq"
if ! sub="$(git rev-parse --verify --quiet "$b^{commit}")"
then
# if 'repository' was given, try to fetch the 'git-subtree-split' hash
# before 'rev-parse'-ing it again, as it might be a tag that we do not have locally
if test -n "${repository}"
then
git fetch "$repository" "$b"
sub="$(git rev-parse --verify --quiet "$b^{commit}")" ||
die "$fail_msg"
else
hint1=$(printf "hint: hash might be a tag, try fetching it from the subtree repository:")
hint2=$(printf "hint: git fetch <subtree-repository> $b")
fail_msg=$(printf "$fail_msg\n$hint1\n$hint2")
die "$fail_msg"
fi
fi
}
# Usage: find_latest_squash DIR [REPOSITORY]
find_latest_squash () {
assert test $# = 1 -o $# = 2
dir="$1"
repository=""
if test "$#" = 2
then
repository="$2"
fi
debug "Looking for latest squash (dir=$dir, repository=$repository)..."
local indent=$(($indent + 1))
sq=
main=
sub=
git log --grep="^git-subtree-dir: $dir/*\$" \
--no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' HEAD |
while read a b junk
do
debug "$a $b $junk"
debug "{{$sq/$main/$sub}}"
case "$a" in
START)
sq="$b"
;;
git-subtree-mainline:)
main="$b"
;;
git-subtree-split:)
process_subtree_split_trailer "$b" "$sq" "$repository"
;;
END)
if test -n "$sub"
then
if test -n "$main"
then
# a rejoin commit?
# Pretend its sub was a squash.
sq=$(git rev-parse --verify "$sq^2") ||
die
fi
debug "Squash found: $sq $sub"
echo "$sq" "$sub"
break
fi
sq=
main=
sub=
;;
esac
done || exit $?
}
# Usage: find_existing_splits DIR REV [REPOSITORY]
find_existing_splits () {
assert test $# = 2 -o $# = 3
debug "Looking for prior splits..."
local indent=$(($indent + 1))
dir="$1"
rev="$2"
repository=""
if test "$#" = 3
then
repository="$3"
fi
main=
sub=
local grep_format="^git-subtree-dir: $dir/*\$"
if test -n "$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' "$rev" |
while read a b junk
do
case "$a" in
START)
sq="$b"
;;
git-subtree-mainline:)
main="$b"
;;
git-subtree-split:)
process_subtree_split_trailer "$b" "$sq" "$repository"
;;
END)
debug "Main is: '$main'"
if test -z "$main" -a -n "$sub"
then
# squash commits refer to a subtree
debug " Squash: $sq from $sub"
cache_set "$sq" "$sub"
fi
if test -n "$main" -a -n "$sub"
then
debug " Prior: $main -> $sub"
cache_set $main $sub
cache_set $sub $sub
try_remove_previous "$main"
try_remove_previous "$sub"
fi
main=
sub=
;;
esac
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}"
git log -1 --no-show-signature --pretty=format:'%an%n%ae%n%aD%n%cn%n%ce%n%cD%n%B' "$1" |
(
read GIT_AUTHOR_NAME
read GIT_AUTHOR_EMAIL
read GIT_AUTHOR_DATE
read GIT_COMMITTER_NAME
read GIT_COMMITTER_EMAIL
read GIT_COMMITTER_DATE
export GIT_AUTHOR_NAME \
GIT_AUTHOR_EMAIL \
GIT_AUTHOR_DATE \
GIT_COMMITTER_NAME \
GIT_COMMITTER_EMAIL \
GIT_COMMITTER_DATE
(
printf "%s" "$arg_split_annotate"
cat
) |
git commit-tree "$2" $3 # reads the rest of stdin
) || die "fatal: 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="$3"
if test -n "$arg_addmerge_message"
then
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
git-subtree-dir: $dir
git-subtree-mainline: $latest_old
git-subtree-split: $latest_new
EOF
}
# Usage: add_squashed_msg REV DIR
add_squashed_msg () {
assert test $# = 2
if test -n "$arg_addmerge_message"
then
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="$3"
if test -n "$arg_addmerge_message"
then
commit_message="$arg_addmerge_message"
else
commit_message="Split '$dir/' into commit '$latest_new'"
fi
cat <<-EOF
$commit_message
git-subtree-dir: $dir
git-subtree-mainline: $latest_old
git-subtree-split: $latest_new
EOF
}
# Usage: squash_msg DIR OLD_SUBTREE_COMMIT NEW_SUBTREE_COMMIT
squash_msg () {
assert test $# = 3
dir="$1"
oldsub="$2"
newsub="$3"
newsub_short=$(git rev-parse --short "$newsub")
if test -n "$oldsub"
then
oldsub_short=$(git rev-parse --short "$oldsub")
echo "Squashed '$dir/' changes from $oldsub_short..$newsub_short"
echo
git log --no-show-signature --pretty=tformat:'%h %s' "$oldsub..$newsub"
git log --no-show-signature --pretty=tformat:'REVERT: %h %s' "$newsub..$oldsub"
else
echo "Squashed '$dir/' content from commit $newsub_short"
fi
echo
echo "git-subtree-dir: $dir"
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" -- "$dir" |
while read mode type tree name
do
assert test "$name" = "$dir"
assert test "$type" = "tree" -o "$type" = "commit"
test "$type" = "commit" && continue # ignore submodules
echo $tree
break
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) || exit $?
if test "$ptree" != "$tree"
then
return 0 # changed
else
return 1 # not changed
fi
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="$3"
tree=$(toptree_for_commit $newsub) || exit $?
if test -n "$old"
then
squash_msg "$dir" "$oldsub" "$newsub" |
git commit-tree "$tree" -p "$old" || exit $?
else
squash_msg "$dir" "" "$newsub" |
git commit-tree "$tree" || exit $?
fi
}
# Usage: copy_or_skip REV TREE NEWPARENTS
copy_or_skip () {
assert test $# = 3
rev="$1"
tree="$2"
newparents="$3"
assert test -n "$tree"
identical=
nonidentical=
p=
gotparents=
copycommit=
for parent in $newparents
do
ptree=$(toptree_for_commit $parent) || exit $?
test -z "$ptree" && continue
if test "$ptree" = "$tree"
then
# an identical parent could be used in place of this rev.
if test -n "$identical"
then
# if a previous identical parent was found, check whether
# one is already an ancestor of the other
mergebase=$(git merge-base $identical $parent)
if test "$identical" = "$mergebase"
then
# current identical commit is an ancestor of parent
identical="$parent"
elif test "$parent" != "$mergebase"
then
# no common history; commit must be copied
copycommit=1
fi
else
# first identical parent detected
identical="$parent"
fi
else
nonidentical="$parent"
fi
# sometimes both old parents map to the same newparent;
# eliminate duplicates
is_new=1
for gp in $gotparents
do
if test "$gp" = "$parent"
then
is_new=
break
fi
done
if test -n "$is_new"
then
gotparents="$gotparents $parent"
p="$p -p $parent"
fi
done
if test -n "$identical" && test -n "$nonidentical"
then
extras=$(git rev-list --count $identical..$nonidentical)
if test "$extras" -ne 0
then
# we need to preserve history along the other branch
copycommit=1
fi
fi
if test -n "$identical" && test -z "$copycommit"
then
echo $identical
else
copy_commit "$rev" "$tree" "$p" || exit $?
fi
}
# Usage: ensure_clean
ensure_clean () {
assert test $# = 0
if ! git diff-index HEAD --exit-code --quiet 2>&1
then
die "fatal: working tree has modifications. Cannot add."
fi
if ! git diff-index --cached HEAD --exit-code --quiet 2>&1
then
die "fatal: index has modifications. Cannot add."
fi
}
# Usage: ensure_valid_ref_format REF
ensure_valid_ref_format () {
assert test $# = 1
git check-ref-format "refs/heads/$1" ||
die "fatal: '$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"
if test $indent -eq 0
then
revcount=$(($revcount + 1))
else
# processing commit without normal parent information;
# fetch from repo
parents=$(git rev-parse "$rev^@")
extracount=$(($extracount + 1))
fi
progress "$revcount/$revmax ($createcount) [$extracount]"
debug "Processing commit: $rev"
local indent=$(($indent + 1))
exists=$(cache_get "$rev") || exit $?
if test -n "$exists"
then
debug "prior: $exists"
return
fi
createcount=$(($createcount + 1))
debug "parents: $parents"
check_parents $parents
newparents=$(cache_get $parents) || exit $?
debug "newparents: $newparents"
tree=$(subtree_for_commit "$rev" "$dir") || exit $?
debug "tree is: $tree"
# ugly. is there no better way to tell if this is a subtree
# vs. a mainline commit? Does it matter?
if test -z "$tree"
then
set_notree "$rev"
if test -n "$newparents"
then
cache_set "$rev" "$rev"
fi
return
fi
newrev=$(copy_or_skip "$rev" "$tree" "$newparents") || exit $?
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 () {
ensure_clean
if test $# -eq 1
then
git rev-parse -q --verify "$1^{commit}" >/dev/null ||
die "fatal: '$1' does not refer to a commit"
cmd_add_commit "$@"
elif test $# -eq 2
then
# Technically we could accept a refspec here but we're
# just going to turn around and add FETCH_HEAD under the
# specified directory. Allowing a refspec might be
# misleading because we won't do anything with any other
# branches fetched via the refspec.
ensure_valid_ref_format "$2"
cmd_add_repository "$@"
else
say >&2 "fatal: 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 $?
cmd_add_commit FETCH_HEAD
}
# Usage: cmd_add_commit REV
cmd_add_commit () {
# 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'..."
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 $?
headrev=$(git rev-parse --verify HEAD) || exit $?
if test -n "$headrev" && test "$headrev" != "$rev"
then
headp="-p $headrev"
else
headp=
fi
if test -n "$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") || exit $?
commit=$(add_msg "$dir" $headrev "$rev" |
git commit-tree "$tree" $headp -p "$revp") || exit $?
fi
git reset "$commit" || exit $?
say >&2 "Added dir '$dir'"
}
# Usage: cmd_split [REV] [REPOSITORY]
cmd_split () {
if test $# -eq 0
then
rev=$(git rev-parse HEAD)
elif test $# -eq 1 -o $# -eq 2
then
rev=$(git rev-parse -q --verify "$1^{commit}") ||
die "fatal: '$1' does not refer to a commit"
else
die "fatal: you must provide exactly one revision, and optionnally a repository. Got: '$*'"
fi
repository=""
if test "$#" = 2
then
repository="$2"
fi
if test -n "$arg_split_rejoin"
then
ensure_clean
fi
debug "Splitting $dir..."
cache_setup || exit $?
if test -n "$arg_split_onto"
then
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: $rev"
cache_set "$rev" "$rev"
done || exit $?
fi
unrevs="$(find_existing_splits "$dir" "$rev" "$repository")" || 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 $rev $unrevs'
revmax=$(eval "$grl" | wc -l)
revcount=0
createcount=0
extracount=0
eval "$grl" |
while read rev parents
do
process_split_commit "$rev" "$parents"
done || exit $?
latest_new=$(cache_get latest_new) || exit $?
if test -z "$latest_new"
then
die "fatal: no new revisions were found"
fi
if test -n "$arg_split_rejoin"
then
debug "Merging split branch into HEAD..."
latest_old=$(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 $?
fi
fi
if test -n "$arg_split_branch"
then
if rev_exists "refs/heads/$arg_split_branch"
then
if ! git merge-base --is-ancestor "$arg_split_branch" "$latest_new"
then
die "fatal: branch '$arg_split_branch' is not an ancestor of commit '$latest_new'."
fi
action='Updated'
else
action='Created'
fi
git update-ref -m 'subtree split' \
"refs/heads/$arg_split_branch" "$latest_new" || exit $?
say >&2 "$action branch '$arg_split_branch'"
fi
echo "$latest_new"
exit 0
}
# Usage: cmd_merge REV [REPOSITORY]
cmd_merge () {
test $# -eq 1 -o $# -eq 2 ||
die "fatal: you must provide exactly one revision, and optionally a repository. Got: '$*'"
rev=$(git rev-parse -q --verify "$1^{commit}") ||
die "fatal: '$1' does not refer to a commit"
repository=""
if test "$#" = 2
then
repository="$2"
fi
ensure_clean
if test -n "$arg_addmerge_squash"
then
first_split="$(find_latest_squash "$dir" "$repository")" || exit $?
if test -z "$first_split"
then
die "fatal: can't squash-merge: '$dir' was never added."
fi
set $first_split
old=$1
sub=$2
if test "$sub" = "$rev"
then
say >&2 "Subtree is already at commit $rev."
exit 0
fi
new=$(new_squash_commit "$old" "$sub" "$rev") || exit $?
debug "New squash commit: $new"
rev="$new"
fi
if test -n "$arg_addmerge_message"
then
git merge --no-ff -Xsubtree="$arg_prefix" \
--message="$arg_addmerge_message" "$rev"
else
git merge --no-ff -Xsubtree="$arg_prefix" $rev
fi
}
# Usage: cmd_pull REPOSITORY REMOTEREF
cmd_pull () {
if test $# -ne 2
then
die "fatal: you must provide <repository> <ref>"
fi
repository="$1"
ref="$2"
ensure_clean
ensure_valid_ref_format "$ref"
git fetch "$repository" "$ref" || exit $?
cmd_merge FETCH_HEAD "$repository"
}
# Usage: cmd_push REPOSITORY [+][LOCALREV:]REMOTEREF
cmd_push () {
if test $# -ne 2
then
die "fatal: you must provide <repository> <refspec>"
fi
if test -e "$dir"
then
repository=$1
refspec=${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 "$localrevname_presplit^{commit}") ||
die "fatal: '$localrevname_presplit' does not refer to a commit"
echo "git push using: " "$repository" "$refspec"
localrev=$(cmd_split "$localrev_presplit" "$repository") || die
git push "$repository" "$localrev":"refs/heads/$remoteref"
else
die "fatal: '$dir' must already exist. Try 'git subtree add'."
fi
}
main "$@"
Reference in New Issue View Git Blame Copy Permalink