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basic options parsing and whatnot.
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commit
0ca71b3737
4 changed files with 126 additions and 0 deletions
1
.gitignore
vendored
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.gitignore
vendored
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*~
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git-subtree
Symbolic link
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git-subtree
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git-subtree.sh
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123
git-subtree.sh
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git-subtree.sh
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#!/bin/bash
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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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OPTS_SPEC="\
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git subtree split <revisions> -- <subdir>
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git subtree merge
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git subtree does foo and bar!
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--
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h,help show the help
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q quiet
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v verbose
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"
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eval $(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)
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. git-sh-setup
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require_work_tree
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quiet=
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command=
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debug()
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{
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if [ -z "$quiet" ]; then
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echo "$@" >&2
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fi
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}
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#echo "Options: $*"
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while [ $# -gt 0 ]; do
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opt="$1"
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shift
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case "$opt" in
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-q) quiet=1 ;;
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--) break ;;
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esac
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done
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command="$1"
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shift
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case "$command" in
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split|merge) ;;
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*) die "Unknown command '$command'" ;;
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esac
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revs=$(git rev-parse --default HEAD --revs-only "$@") || exit $?
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dirs="$(git rev-parse --sq --no-revs --no-flags "$@")" || exit $?
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#echo "dirs is {$dirs}"
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eval $(echo set -- $dirs)
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if [ "$#" -ne 1 ]; then
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die "Must provide exactly one subtree dir (got $#)"
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fi
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dir="$1"
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debug "command: {$command}"
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debug "quiet: {$quiet}"
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debug "revs: {$revs}"
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debug "dir: {$dir}"
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cache_setup()
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{
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cachedir="$GIT_DIR/subtree-cache/$dir"
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rm -rf "$cachedir" || die "Can't delete old cachedir: $cachedir"
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mkdir -p "$cachedir" || die "Can't create new cachedir: $cachedir"
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debug "Using cachedir: $cachedir" >&2
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echo "$cachedir"
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}
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cache_get()
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{
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for oldrev in $*; do
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if [ -r "$cachedir/$oldrev" ]; then
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read newrev <"$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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cache_set()
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{
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oldrev="$1"
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newrev="$2"
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if [ -e "$cachedir/$oldrev" ]; then
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die "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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cmd_split()
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{
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debug "Splitting $dir..."
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cache_setup || exit $?
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git rev-list --reverse --parents $revs -- "$dir" |
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while read rev parents; do
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newparents=$(cache_get $parents)
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echo "rev: $rev / $newparents"
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git ls-tree $rev -- "$dir" |
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while read mode type tree name; do
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p=""
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for parent in $newparents; do
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p="$p -p $parent"
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done
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newrev=$(echo synthetic | git commit-tree $tree $p) \
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|| die "Can't create new commit for $rev / $tree"
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cache_set $rev $newrev
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done
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done
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exit 0
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}
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cmd_merge()
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{
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die "merge command not implemented yet"
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}
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"cmd_$command"
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shellopts.sh
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1
shellopts.sh
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export PATH=$PWD:$PATH
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