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https://github.com/git/git
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![René Scharfe](/assets/img/avatar_default.png)
"git subtree" only handles the negated variant of the options annotate, prefix, onto, rejoin, ignore-joins and squash explicitly. help is handled by "git rev-parse --parseopt" implicitly, but not its negated form. Disable negation for it and the for the rest of the options to get a helpful error message when trying them. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1093 lines
24 KiB
Bash
Executable file
1093 lines
24 KiB
Bash
Executable file
#!/bin/sh
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#
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# git-subtree.sh: split/join git repositories in subdirectories of this one
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#
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# Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>
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#
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if test -z "$GIT_EXEC_PATH" || ! test -f "$GIT_EXEC_PATH/git-sh-setup" || {
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test "${PATH#"${GIT_EXEC_PATH}:"}" = "$PATH" &&
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test ! "$GIT_EXEC_PATH" -ef "${PATH%%:*}" 2>/dev/null
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}
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then
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basename=${0##*[/\\]}
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echo >&2 'It looks like either your git installation or your'
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echo >&2 'git-subtree installation is broken.'
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echo >&2
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echo >&2 "Tips:"
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echo >&2 " - If \`git --exec-path\` does not print the correct path to"
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echo >&2 " your git install directory, then set the GIT_EXEC_PATH"
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echo >&2 " environment variable to the correct directory."
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echo >&2 " - Make sure that your \`$basename\` file is either in your"
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echo >&2 " PATH or in your git exec path (\`$(git --exec-path)\`)."
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echo >&2 " - You should run git-subtree as \`git ${basename#git-}\`,"
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echo >&2 " not as \`$basename\`." >&2
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exit 126
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fi
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OPTS_SPEC="\
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git subtree add --prefix=<prefix> <commit>
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git subtree add --prefix=<prefix> <repository> <ref>
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git subtree merge --prefix=<prefix> <commit>
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git subtree split --prefix=<prefix> [<commit>]
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git subtree pull --prefix=<prefix> <repository> <ref>
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git subtree push --prefix=<prefix> <repository> <refspec>
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--
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h,help! show the help
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q,quiet! quiet
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d,debug! show debug messages
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P,prefix= the name of the subdir to split out
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options for 'split' (also: 'push')
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annotate= add a prefix to commit message of new commits
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b,branch!= create a new branch from the split subtree
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ignore-joins ignore prior --rejoin commits
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onto= try connecting new tree to an existing one
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rejoin merge the new branch back into HEAD
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options for 'add' and 'merge' (also: 'pull', 'split --rejoin', and 'push --rejoin')
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squash merge subtree changes as a single commit
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m,message!= use the given message as the commit message for the merge commit
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"
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indent=0
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# Usage: say [MSG...]
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say () {
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if test -z "$arg_quiet"
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then
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printf '%s\n' "$*"
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fi
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}
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# Usage: debug [MSG...]
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debug () {
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if test -n "$arg_debug"
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then
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printf "%$(($indent * 2))s%s\n" '' "$*" >&2
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fi
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}
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# Usage: progress [MSG...]
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progress () {
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if test -z "$arg_quiet"
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then
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if test -z "$arg_debug"
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then
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# Debug mode is off.
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#
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# Print one progress line that we keep updating (use
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# "\r" to return to the beginning of the line, rather
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# than "\n" to start a new line). This only really
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# works when stderr is a terminal.
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printf "%s\r" "$*" >&2
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else
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# Debug mode is on. The `debug` function is regularly
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# printing to stderr.
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#
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# Don't do the one-line-with-"\r" thing, because on a
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# terminal the debug output would overwrite and hide the
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# progress output. Add a "progress:" prefix to make the
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# progress output and the debug output easy to
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# distinguish. This ensures maximum readability whether
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# stderr is a terminal or a file.
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printf "progress: %s\n" "$*" >&2
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fi
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fi
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}
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# Usage: assert CMD...
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assert () {
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if ! "$@"
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then
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die "fatal: assertion failed: $*"
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fi
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}
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# Usage: die_incompatible_opt OPTION COMMAND
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die_incompatible_opt () {
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assert test "$#" = 2
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opt="$1"
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arg_command="$2"
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die "fatal: the '$opt' flag does not make sense with 'git subtree $arg_command'."
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}
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main () {
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if test $# -eq 0
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then
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set -- -h
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fi
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set_args="$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
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eval "$set_args"
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. git-sh-setup
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require_work_tree
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# First figure out the command and whether we use --rejoin, so
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# that we can provide more helpful validation when we do the
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# "real" flag parsing.
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arg_split_rejoin=
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allow_split=
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allow_addmerge=
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while test $# -gt 0
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do
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opt="$1"
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shift
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case "$opt" in
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--annotate|-b|-P|-m|--onto)
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shift
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;;
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--rejoin)
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arg_split_rejoin=1
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;;
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--no-rejoin)
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arg_split_rejoin=
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;;
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--)
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break
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;;
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esac
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done
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arg_command=$1
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case "$arg_command" in
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add|merge|pull)
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allow_addmerge=1
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;;
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split|push)
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allow_split=1
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allow_addmerge=$arg_split_rejoin
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;;
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*)
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die "fatal: unknown command '$arg_command'"
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;;
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esac
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# Reset the arguments array for "real" flag parsing.
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eval "$set_args"
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# Begin "real" flag parsing.
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arg_quiet=
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arg_debug=
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arg_prefix=
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arg_split_branch=
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arg_split_onto=
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arg_split_ignore_joins=
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arg_split_annotate=
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arg_addmerge_squash=
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arg_addmerge_message=
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while test $# -gt 0
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do
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opt="$1"
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shift
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case "$opt" in
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-q)
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arg_quiet=1
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;;
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-d)
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arg_debug=1
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;;
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--annotate)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_annotate="$1"
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shift
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;;
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--no-annotate)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_annotate=
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;;
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-b)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_branch="$1"
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shift
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;;
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-P)
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arg_prefix="${1%/}"
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shift
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;;
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-m)
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test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
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arg_addmerge_message="$1"
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shift
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;;
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--no-prefix)
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arg_prefix=
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;;
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--onto)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_onto="$1"
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shift
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;;
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--no-onto)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_onto=
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;;
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--rejoin)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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;;
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--no-rejoin)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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;;
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--ignore-joins)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_ignore_joins=1
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;;
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--no-ignore-joins)
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test -n "$allow_split" || die_incompatible_opt "$opt" "$arg_command"
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arg_split_ignore_joins=
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;;
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--squash)
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test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
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arg_addmerge_squash=1
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;;
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--no-squash)
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test -n "$allow_addmerge" || die_incompatible_opt "$opt" "$arg_command"
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arg_addmerge_squash=
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;;
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--)
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break
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;;
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*)
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die "fatal: unexpected option: $opt"
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;;
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esac
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done
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shift
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if test -z "$arg_prefix"
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then
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die "fatal: you must provide the --prefix option."
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fi
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case "$arg_command" in
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add)
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test -e "$arg_prefix" &&
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die "fatal: prefix '$arg_prefix' already exists."
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;;
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*)
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test -e "$arg_prefix" ||
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die "fatal: '$arg_prefix' does not exist; use 'git subtree add'"
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;;
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esac
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dir="$(dirname "$arg_prefix/.")"
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debug "command: {$arg_command}"
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debug "quiet: {$arg_quiet}"
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debug "dir: {$dir}"
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debug "opts: {$*}"
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debug
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"cmd_$arg_command" "$@"
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}
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# Usage: cache_setup
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cache_setup () {
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assert test $# = 0
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cachedir="$GIT_DIR/subtree-cache/$$"
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rm -rf "$cachedir" ||
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die "fatal: can't delete old cachedir: $cachedir"
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mkdir -p "$cachedir" ||
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die "fatal: can't create new cachedir: $cachedir"
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mkdir -p "$cachedir/notree" ||
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die "fatal: can't create new cachedir: $cachedir/notree"
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debug "Using cachedir: $cachedir" >&2
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}
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# Usage: cache_get [REVS...]
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cache_get () {
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for oldrev in "$@"
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do
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if test -r "$cachedir/$oldrev"
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then
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read newrev <"$cachedir/$oldrev"
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echo $newrev
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fi
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done
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}
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# Usage: cache_miss [REVS...]
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cache_miss () {
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for oldrev in "$@"
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do
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if ! test -r "$cachedir/$oldrev"
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then
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echo $oldrev
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fi
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done
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}
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# Usage: check_parents [REVS...]
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check_parents () {
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missed=$(cache_miss "$@") || exit $?
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local indent=$(($indent + 1))
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for miss in $missed
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do
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if ! test -r "$cachedir/notree/$miss"
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then
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debug "incorrect order: $miss"
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process_split_commit "$miss" ""
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fi
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done
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}
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# Usage: set_notree REV
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set_notree () {
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assert test $# = 1
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echo "1" > "$cachedir/notree/$1"
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}
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# Usage: cache_set OLDREV NEWREV
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cache_set () {
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assert test $# = 2
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oldrev="$1"
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newrev="$2"
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if test "$oldrev" != "latest_old" &&
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test "$oldrev" != "latest_new" &&
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test -e "$cachedir/$oldrev"
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then
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die "fatal: cache for $oldrev already exists!"
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fi
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echo "$newrev" >"$cachedir/$oldrev"
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}
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# Usage: rev_exists REV
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rev_exists () {
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assert test $# = 1
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if git rev-parse "$1" >/dev/null 2>&1
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then
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return 0
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else
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return 1
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fi
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}
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# Usage: try_remove_previous REV
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#
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# If a commit doesn't have a parent, this might not work. But we only want
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# to remove the parent from the rev-list, and since it doesn't exist, it won't
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# be there anyway, so do nothing in that case.
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try_remove_previous () {
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assert test $# = 1
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if rev_exists "$1^"
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then
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echo "^$1^"
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fi
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}
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# Usage: process_subtree_split_trailer SPLIT_HASH MAIN_HASH [REPOSITORY]
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process_subtree_split_trailer () {
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assert test $# = 2 -o $# = 3
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b="$1"
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sq="$2"
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repository=""
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if test "$#" = 3
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then
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repository="$3"
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fi
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fail_msg="fatal: could not rev-parse split hash $b from commit $sq"
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if ! sub="$(git rev-parse --verify --quiet "$b^{commit}")"
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then
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# if 'repository' was given, try to fetch the 'git-subtree-split' hash
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# before 'rev-parse'-ing it again, as it might be a tag that we do not have locally
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if test -n "${repository}"
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then
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git fetch "$repository" "$b"
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sub="$(git rev-parse --verify --quiet "$b^{commit}")" ||
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die "$fail_msg"
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else
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hint1=$(printf "hint: hash might be a tag, try fetching it from the subtree repository:")
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hint2=$(printf "hint: git fetch <subtree-repository> $b")
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fail_msg=$(printf "$fail_msg\n$hint1\n$hint2")
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die "$fail_msg"
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fi
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fi
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}
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# Usage: find_latest_squash DIR [REPOSITORY]
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find_latest_squash () {
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assert test $# = 1 -o $# = 2
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dir="$1"
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repository=""
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if test "$#" = 2
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then
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repository="$2"
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fi
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debug "Looking for latest squash (dir=$dir, repository=$repository)..."
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local indent=$(($indent + 1))
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sq=
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main=
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sub=
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git log --grep="^git-subtree-dir: $dir/*\$" \
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--no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' HEAD |
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while read a b junk
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do
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debug "$a $b $junk"
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debug "{{$sq/$main/$sub}}"
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case "$a" in
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START)
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sq="$b"
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;;
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git-subtree-mainline:)
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main="$b"
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;;
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git-subtree-split:)
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process_subtree_split_trailer "$b" "$sq" "$repository"
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;;
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END)
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if test -n "$sub"
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then
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if test -n "$main"
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then
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# a rejoin commit?
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# Pretend its sub was a squash.
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sq=$(git rev-parse --verify "$sq^2") ||
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die
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fi
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debug "Squash found: $sq $sub"
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echo "$sq" "$sub"
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break
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fi
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sq=
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main=
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sub=
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;;
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esac
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done || exit $?
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}
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# Usage: find_existing_splits DIR REV [REPOSITORY]
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find_existing_splits () {
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assert test $# = 2 -o $# = 3
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debug "Looking for prior splits..."
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local indent=$(($indent + 1))
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dir="$1"
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rev="$2"
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repository=""
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if test "$#" = 3
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then
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repository="$3"
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fi
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main=
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sub=
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local grep_format="^git-subtree-dir: $dir/*\$"
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if test -n "$arg_split_ignore_joins"
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then
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grep_format="^Add '$dir/' from commit '"
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fi
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git log --grep="$grep_format" \
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--no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' "$rev" |
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while read a b junk
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do
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case "$a" in
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START)
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sq="$b"
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;;
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git-subtree-mainline:)
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main="$b"
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;;
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git-subtree-split:)
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process_subtree_split_trailer "$b" "$sq" "$repository"
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;;
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END)
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debug "Main is: '$main'"
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if test -z "$main" -a -n "$sub"
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then
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# squash commits refer to a subtree
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debug " Squash: $sq from $sub"
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cache_set "$sq" "$sub"
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fi
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if test -n "$main" -a -n "$sub"
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then
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debug " Prior: $main -> $sub"
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cache_set $main $sub
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cache_set $sub $sub
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try_remove_previous "$main"
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try_remove_previous "$sub"
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fi
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main=
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sub=
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;;
|
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esac
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done || exit $?
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|
}
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|
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|
# Usage: copy_commit REV TREE FLAGS_STR
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|
copy_commit () {
|
|
assert test $# = 3
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|
# We're going to set some environment vars here, so
|
|
# do it in a subshell to get rid of them safely later
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|
debug copy_commit "{$1}" "{$2}" "{$3}"
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git log -1 --no-show-signature --pretty=format:'%an%n%ae%n%aD%n%cn%n%ce%n%cD%n%B' "$1" |
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(
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read GIT_AUTHOR_NAME
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read GIT_AUTHOR_EMAIL
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read GIT_AUTHOR_DATE
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read GIT_COMMITTER_NAME
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read GIT_COMMITTER_EMAIL
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read GIT_COMMITTER_DATE
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export GIT_AUTHOR_NAME \
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GIT_AUTHOR_EMAIL \
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GIT_AUTHOR_DATE \
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GIT_COMMITTER_NAME \
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GIT_COMMITTER_EMAIL \
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GIT_COMMITTER_DATE
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|
(
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printf "%s" "$arg_split_annotate"
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|
cat
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|
) |
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git commit-tree "$2" $3 # reads the rest of stdin
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|
) || die "fatal: can't copy commit $1"
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|
}
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|
|
|
# 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: '$dir' must already exist. Try 'git subtree add'."
|
|
fi
|
|
}
|
|
|
|
main "$@"
|