From 30364e91b8b4b863abb57c6ea7c2417f7e0b3969 Mon Sep 17 00:00:00 2001
From: Tony Duckles <tony@nynim.org>
Date: Mon, 4 Apr 2016 19:22:46 -0500
Subject: [PATCH] bin/git-subtree: Remove, now in standard Git distrib

---
 bin/git-subtree | 683 ------------------------------------------------
 1 file changed, 683 deletions(-)
 delete mode 100755 bin/git-subtree

diff --git a/bin/git-subtree b/bin/git-subtree
deleted file mode 100755
index 781eef3..0000000
--- a/bin/git-subtree
+++ /dev/null
@@ -1,683 +0,0 @@
-#!/bin/bash
-#
-# git-subtree.sh: split/join git repositories in subdirectories of this one
-#
-# Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>
-#
-if [ $# -eq 0 ]; then
-    set -- -h
-fi
-OPTS_SPEC="\
-git subtree add   --prefix=<prefix> <commit>
-git subtree merge --prefix=<prefix> <commit>
-git subtree pull  --prefix=<prefix> <repository> <refspec...>
-git subtree push  --prefix=<prefix> <repository> <refspec...>
-git subtree split --prefix=<prefix> <commit...>
---
-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'
-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', 'pull' and 'push'
-squash        merge subtree changes as a single commit
-"
-eval $(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)
-
-PATH=$PATH:$(git --exec-path)
-. git-sh-setup
-
-require_work_tree
-
-quiet=
-branch=
-debug=
-command=
-onto=
-rejoin=
-ignore_joins=
-annotate=
-squash=
-message=
-
-debug()
-{
-	if [ -n "$debug" ]; then
-		echo "$@" >&2
-	fi
-}
-
-say()
-{
-	if [ -z "$quiet" ]; then
-		echo "$@" >&2
-	fi
-}
-
-assert()
-{
-	if "$@"; then
-		:
-	else
-		die "assertion failed: " "$@"
-	fi
-}
-
-
-#echo "Options: $*"
-
-while [ $# -gt 0 ]; do
-	opt="$1"
-	shift
-	case "$opt" in
-		-q) quiet=1 ;;
-		-d) debug=1 ;;
-		--annotate) annotate="$1"; shift ;;
-		--no-annotate) annotate= ;;
-		-b) branch="$1"; shift ;;
-		-P) prefix="$1"; shift ;;
-		-m) message="$1"; shift ;;
-		--no-prefix) prefix= ;;
-		--onto) onto="$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 ;;
-		*) die "Unexpected option: $opt" ;;
-	esac
-done
-
-command="$1"
-shift
-case "$command" in
-	add|merge|pull) default= ;;
-	split|push) default="--default HEAD" ;;
-	*) die "Unknown command '$command'" ;;
-esac
-
-if [ -z "$prefix" ]; then
-	die "You must provide the --prefix option."
-fi
-
-case "$command" in
-	add) [ -e "$prefix" ] && 
-		die "prefix '$prefix' already exists." ;;
-	*)   [ -e "$prefix" ] || 
-		die "'$prefix' does not exist; use 'git subtree add'" ;;
-esac
-
-dir="$(dirname "$prefix/.")"
-
-if [ "$command" != "pull" -a "$command" != "add" -a "$command" != "push" ]; then
-	revs=$(git rev-parse $default --revs-only "$@") || exit $?
-	dirs="$(git rev-parse --no-revs --no-flags "$@")" || exit $?
-	if [ -n "$dirs" ]; then
-		die "Error: Use --prefix instead of bare filenames."
-	fi
-fi
-
-debug "command: {$command}"
-debug "quiet: {$quiet}"
-debug "revs: {$revs}"
-debug "dir: {$dir}"
-debug "opts: {$*}"
-debug
-
-cache_setup()
-{
-	cachedir="$GIT_DIR/subtree-cache/$$"
-	rm -rf "$cachedir" || die "Can't delete old cachedir: $cachedir"
-	mkdir -p "$cachedir" || die "Can't create new cachedir: $cachedir"
-	debug "Using cachedir: $cachedir" >&2
-}
-
-cache_get()
-{
-	for oldrev in $*; do
-		if [ -r "$cachedir/$oldrev" ]; then
-			read newrev <"$cachedir/$oldrev"
-			echo $newrev
-		fi
-	done
-}
-
-cache_set()
-{
-	oldrev="$1"
-	newrev="$2"
-	if [ "$oldrev" != "latest_old" \
-	     -a "$oldrev" != "latest_new" \
-	     -a -e "$cachedir/$oldrev" ]; then
-		die "cache for $oldrev already exists!"
-	fi
-	echo "$newrev" >"$cachedir/$oldrev"
-}
-
-rev_exists()
-{
-	if git rev-parse "$1" >/dev/null 2>&1; then
-		return 0
-	else
-		return 1
-	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 [ -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
-# 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()
-{
-	if rev_exists "$1^"; then
-		echo "^$1^"
-	fi
-}
-
-find_latest_squash()
-{
-	debug "Looking for latest squash ($dir)..."
-	dir="$1"
-	sq=
-	main=
-	sub=
-	git log --grep="^git-subtree-dir: $dir/*\$" \
-		--pretty=format:'START %H%n%s%n%n%b%nEND%n' HEAD |
-	while read a b junk; do
-		debug "$a $b $junk"
-		debug "{{$sq/$main/$sub}}"
-		case "$a" in
-			START) sq="$b" ;;
-			git-subtree-mainline:) main="$b" ;;
-			git-subtree-split:) sub="$b" ;;
-			END)
-				if [ -n "$sub" ]; then
-					if [ -n "$main" ]; then
-						# a rejoin commit?
-						# Pretend its sub was a squash.
-						sq="$sub"
-					fi
-					debug "Squash found: $sq $sub"
-					echo "$sq" "$sub"
-					break
-				fi
-				sq=
-				main=
-				sub=
-				;;
-		esac
-	done
-}
-
-find_existing_splits()
-{
-	debug "Looking for prior splits..."
-	dir="$1"
-	revs="$2"
-	main=
-	sub=
-	git log --grep="^git-subtree-dir: $dir/*\$" \
-		--pretty=format:'START %H%n%s%n%n%b%nEND%n' $revs |
-	while read a b junk; do
-		case "$a" in
-			START) sq="$b" ;;
-			git-subtree-mainline:) main="$b" ;;
-			git-subtree-split:) sub="$b" ;;
-			END)
-				debug "  Main is: '$main'"
-				if [ -z "$main" -a -n "$sub" ]; then
-					# squash commits refer to a subtree
-					debug "  Squash: $sq from $sub"
-					cache_set "$sq" "$sub"
-				fi
-				if [ -n "$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
-}
-
-copy_commit()
-{
-	# 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 --pretty=format:'%an%n%ae%n%ad%n%cn%n%ce%n%cd%n%s%n%n%b' "$1" |
-	(
-		read GIT_AUTHOR_NAME
-		read GIT_AUTHOR_EMAIL
-		read GIT_AUTHOR_DATE
-		read GIT_COMMITTER_NAME
-		read GIT_COMMITTER_EMAIL
-		read GIT_COMMITTER_DATE
-		export  GIT_AUTHOR_NAME \
-			GIT_AUTHOR_EMAIL \
-			GIT_AUTHOR_DATE \
-			GIT_COMMITTER_NAME \
-			GIT_COMMITTER_EMAIL \
-			GIT_COMMITTER_DATE
-		(echo -n "$annotate"; cat ) |
-		git commit-tree "$2" $3  # reads the rest of stdin
-	) || die "Can't copy commit $1"
-}
-
-add_msg()
-{
-	dir="$1"
-	latest_old="$2"
-	latest_new="$3"
-	if [ -n "$message" ]; then
-		commit_message="$message"
-	else
-		commit_message="Add '$dir/' from commit '$latest_new'"
-	fi
-	cat <<-EOF
-		$commit_message
-		
-		git-subtree-dir: $dir
-		git-subtree-mainline: $latest_old
-		git-subtree-split: $latest_new
-	EOF
-}
-
-add_squashed_msg()
-{
-	if [ -n "$message" ]; then
-		echo "$message"
-	else
-		echo "Merge commit '$1' as '$2'"
-	fi
-}
-
-rejoin_msg()
-{
-	dir="$1"
-	latest_old="$2"
-	latest_new="$3"
-	if [ -n "$message" ]; then
-		commit_message="$message"
-	else
-		commit_message="Split '$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
-}
-
-squash_msg()
-{
-	dir="$1"
-	oldsub="$2"
-	newsub="$3"
-	newsub_short=$(git rev-parse --short "$newsub")
-	
-	if [ -n "$oldsub" ]; then
-		oldsub_short=$(git rev-parse --short "$oldsub")
-		echo "Squashed '$dir/' changes from $oldsub_short..$newsub_short"
-		echo
-		git log --pretty=tformat:'%h %s' "$oldsub..$newsub"
-		git log --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"
-}
-
-toptree_for_commit()
-{
-	commit="$1"
-	git log -1 --pretty=format:'%T' "$commit" -- || exit $?
-}
-
-subtree_for_commit()
-{
-	commit="$1"
-	dir="$2"
-	git ls-tree "$commit" -- "$dir" |
-	while read mode type tree name; do
-		assert [ "$name" = "$dir" ]
-		assert [ "$type" = "tree" ]
-		echo $tree
-		break
-	done
-}
-
-tree_changed()
-{
-	tree=$1
-	shift
-	if [ $# -ne 1 ]; then
-		return 0   # weird parents, consider it changed
-	else
-		ptree=$(toptree_for_commit $1)
-		if [ "$ptree" != "$tree" ]; then
-			return 0   # changed
-		else
-			return 1   # not changed
-		fi
-	fi
-}
-
-new_squash_commit()
-{
-	old="$1"
-	oldsub="$2"
-	newsub="$3"
-	tree=$(toptree_for_commit $newsub) || exit $?
-	if [ -n "$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
-}
-
-copy_or_skip()
-{
-	rev="$1"
-	tree="$2"
-	newparents="$3"
-	assert [ -n "$tree" ]
-
-	identical=
-	nonidentical=
-	p=
-	gotparents=
-	for parent in $newparents; do
-		ptree=$(toptree_for_commit $parent) || exit $?
-		[ -z "$ptree" ] && continue
-		if [ "$ptree" = "$tree" ]; then
-			# an identical parent could be used in place of this rev.
-			identical="$parent"
-		else
-			nonidentical="$parent"
-		fi
-		
-		# sometimes both old parents map to the same newparent;
-		# eliminate duplicates
-		is_new=1
-		for gp in $gotparents; do
-			if [ "$gp" = "$parent" ]; then
-				is_new=
-				break
-			fi
-		done
-		if [ -n "$is_new" ]; then
-			gotparents="$gotparents $parent"
-			p="$p -p $parent"
-		fi
-	done
-	
-	if [ -n "$identical" ]; then
-		echo $identical
-	else
-		copy_commit $rev $tree "$p" || exit $?
-	fi
-}
-
-ensure_clean()
-{
-	if ! git diff-index HEAD --exit-code --quiet 2>&1; then
-		die "Working tree has modifications.  Cannot add."
-	fi
-	if ! git diff-index --cached HEAD --exit-code --quiet 2>&1; then
-		die "Index has modifications.  Cannot add."
-	fi
-}
-
-cmd_add()
-{
-	if [ -e "$dir" ]; then
-		die "'$dir' already exists.  Cannot add."
-	fi
-
-	ensure_clean
-	
-	if [ $# -eq 1 ]; then
-		"cmd_add_commit" "$@"
-	elif [ $# -eq 2 ]; then
-		"cmd_add_repository" "$@"
-	else
-	    say "error: parameters were '$@'"
-	    die "Provide either a refspec or a repository and refspec."
-	fi
-}
-
-cmd_add_repository()
-{
-	echo "git fetch" "$@"
-	repository=$1
-	refspec=$2
-	git fetch "$@" || exit $?
-	revs=FETCH_HEAD
-	set -- $revs
-	cmd_add_commit "$@"
-}
-
-cmd_add_commit()
-{
-	revs=$(git rev-parse $default --revs-only "$@") || exit $?
-	set -- $revs
-	rev="$1"
-	
-	debug "Adding $dir as '$rev'..."
-	git read-tree --prefix="$dir" $rev || exit $?
-	git checkout -- "$dir" || exit $?
-	tree=$(git write-tree) || exit $?
-	
-	headrev=$(git rev-parse HEAD) || exit $?
-	if [ -n "$headrev" -a "$headrev" != "$rev" ]; then
-		headp="-p $headrev"
-	else
-		headp=
-	fi
-	
-	if [ -n "$squash" ]; then
-		rev=$(new_squash_commit "" "" "$rev") || exit $?
-		commit=$(add_squashed_msg "$rev" "$dir" |
-			 git commit-tree $tree $headp -p "$rev") || exit $?
-	else
-		commit=$(add_msg "$dir" "$headrev" "$rev" |
-			 git commit-tree $tree $headp -p "$rev") || exit $?
-	fi
-	git reset "$commit" || exit $?
-	
-	say "Added dir '$dir'"
-}
-
-cmd_split()
-{
-	debug "Splitting $dir..."
-	cache_setup || exit $?
-	
-	if [ -n "$onto" ]; then
-		debug "Reading history for --onto=$onto..."
-		git rev-list $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 $rev
-		done
-	fi
-	
-	if [ -n "$ignore_joins" ]; then
-		unrevs=
-	else
-		unrevs="$(find_existing_splits "$dir" "$revs")"
-	fi
-	
-	# 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 --reverse --parents $revs $unrevs'
-	revmax=$(eval "$grl" | wc -l)
-	revcount=0
-	createcount=0
-	eval "$grl" |
-	while read rev parents; do
-		revcount=$(($revcount + 1))
-		say -n "$revcount/$revmax ($createcount)
"
-		debug "Processing commit: $rev"
-		exists=$(cache_get $rev)
-		if [ -n "$exists" ]; then
-			debug "  prior: $exists"
-			continue
-		fi
-		createcount=$(($createcount + 1))
-		debug "  parents: $parents"
-		newparents=$(cache_get $parents)
-		debug "  newparents: $newparents"
-		
-		tree=$(subtree_for_commit $rev "$dir")
-		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 [ -z $tree ]; then
-			if [ -n "$newparents" ]; then
-				cache_set $rev $rev
-			fi
-			continue
-		fi
-
-		newrev=$(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
-	done || exit $?
-	latest_new=$(cache_get latest_new)
-	if [ -z "$latest_new" ]; then
-		die "No new revisions were found"
-	fi
-	
-	if [ -n "$rejoin" ]; then
-		debug "Merging split branch into HEAD..."
-		latest_old=$(cache_get latest_old)
-		git merge -s ours \
-			-m "$(rejoin_msg $dir $latest_old $latest_new)" \
-			$latest_new >&2 || exit $?
-	fi
-	if [ -n "$branch" ]; then
-		if rev_exists "refs/heads/$branch"; then
-			if ! rev_is_descendant_of_branch $latest_new $branch; then
-				die "Branch '$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'"
-	fi
-	echo $latest_new
-	exit 0
-}
-
-cmd_merge()
-{
-	revs=$(git rev-parse $default --revs-only "$@") || exit $?
-	ensure_clean
-	
-	set -- $revs
-	if [ $# -ne 1 ]; then
-		die "You must provide exactly one revision.  Got: '$revs'"
-	fi
-	rev="$1"
-	
-	if [ -n "$squash" ]; then
-		first_split="$(find_latest_squash "$dir")"
-		if [ -z "$first_split" ]; then
-			die "Can't squash-merge: '$dir' was never added."
-		fi
-		set $first_split
-		old=$1
-		sub=$2
-		if [ "$sub" = "$rev" ]; then
-			say "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
-
-	version=$(git version)
-	if [ "$version" \< "git version 1.7" ]; then
-		if [ -n "$message" ]; then
-			git merge -s subtree --message="$message" $rev
-		else
-			git merge -s subtree $rev
-		fi
-	else
-		if [ -n "$message" ]; then
-			git merge -Xsubtree="$prefix" --message="$message" $rev
-		else
-			git merge -Xsubtree="$prefix" $rev
-		fi
-	fi
-}
-
-cmd_pull()
-{
-	ensure_clean
-	git fetch "$@" || exit $?
-	revs=FETCH_HEAD
-	set -- $revs
-	cmd_merge "$@"
-}
-
-cmd_push()
-{
-	if [ $# -ne 2 ]; then
-	    die "You must provide <repository> <refspec>"
-	fi
-	if [ -e "$dir" ]; then
-	    repository=$1
-	    refspec=$2
-	    echo "git push using: " $repository $refspec
-	    git push $repository $(git subtree split --prefix=$prefix):refs/heads/$refspec
-	else
-	    die "'$dir' must already exist. Try 'git subtree add'."
-	fi
-}
-
-"cmd_$command" "$@"
-- 
2.47.1