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subtree: parse revs in individual cmd_ functions
The main argument parser goes ahead and tries to parse revs to make things simpler for the sub-command implementations. But, it includes enough special cases for different sub-commands. And it's difficult having having to think about "is this info coming from an argument, or a global variable?". So the main argument parser's effort to make things "simpler" ends up just making it more confusing and complicated. Begone with the 'revs' global variable; parse 'rev=$(...)' as needed in individual 'cmd_*' functions. Begone with the 'default' global variable. Its would-be value is knowable just from which function we're in. Begone with the 'ensure_single_rev' function. Its functionality can be achieved by passing '--verify' to 'git rev-parse'. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -76,13 +76,6 @@ assert () {
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fi
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}
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ensure_single_rev () {
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if test $# -ne 1
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then
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die "You must provide exactly one revision. Got: '$*'"
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fi
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}
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main () {
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if test $# -eq 0
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then
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@ -164,11 +157,8 @@ main () {
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shift
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case "$arg_command" in
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add|merge|pull)
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default=
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;;
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split|push)
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default="--default HEAD"
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add|merge|pull|split|push)
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:
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;;
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*)
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die "Unknown command '$arg_command'"
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@ -193,22 +183,8 @@ main () {
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dir="$(dirname "$arg_prefix/.")"
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if test "$arg_command" != "pull" &&
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test "$arg_command" != "add" &&
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test "$arg_command" != "push"
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then
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revs=$(git rev-parse $default --revs-only "$@") || exit $?
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dirs=$(git rev-parse --no-revs --no-flags "$@") || exit $?
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ensure_single_rev $revs
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if test -n "$dirs"
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then
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die "Error: Use --prefix instead of bare filenames."
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fi
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fi
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debug "command: {$arg_command}"
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debug "quiet: {$GIT_QUIET}"
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debug "revs: {$revs}"
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debug "dir: {$dir}"
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debug "opts: {$*}"
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debug
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@ -714,14 +690,13 @@ cmd_add_repository () {
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repository=$1
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refspec=$2
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git fetch "$@" || exit $?
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revs=FETCH_HEAD
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set -- $revs
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cmd_add_commit "$@"
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cmd_add_commit FETCH_HEAD
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}
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cmd_add_commit () {
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rev=$(git rev-parse $default --revs-only "$@") || exit $?
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ensure_single_rev $rev
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# The rev has already been validated by cmd_add(), we just
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# need to normalize it.
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rev=$(git rev-parse --verify "$1^{commit}") || exit $?
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debug "Adding $dir as '$rev'..."
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git read-tree --prefix="$dir" $rev || exit $?
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@ -752,6 +727,17 @@ cmd_add_commit () {
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}
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cmd_split () {
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if test $# -eq 0
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then
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rev=$(git rev-parse HEAD)
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elif test $# -eq 1
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then
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rev=$(git rev-parse -q --verify "$1^{commit}") ||
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die "'$1' does not refer to a commit"
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else
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die "You must provide exactly one revision. Got: '$*'"
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fi
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debug "Splitting $dir..."
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cache_setup || exit $?
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@ -768,12 +754,12 @@ cmd_split () {
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done || exit $?
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fi
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unrevs="$(find_existing_splits "$dir" "$revs")" || exit $?
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unrevs="$(find_existing_splits "$dir" "$rev")" || exit $?
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# We can't restrict rev-list to only $dir here, because some of our
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# parents have the $dir contents the root, and those won't match.
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# (and rev-list --follow doesn't seem to solve this)
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grl='git rev-list --topo-order --reverse --parents $revs $unrevs'
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grl='git rev-list --topo-order --reverse --parents $rev $unrevs'
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revmax=$(eval "$grl" | wc -l)
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revcount=0
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createcount=0
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@ -820,8 +806,10 @@ cmd_split () {
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}
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cmd_merge () {
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rev=$(git rev-parse $default --revs-only "$@") || exit $?
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ensure_single_rev $rev
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test $# -eq 1 ||
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die "You must provide exactly one revision. Got: '$*'"
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rev=$(git rev-parse -q --verify "$1^{commit}") ||
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die "'$1' does not refer to a commit"
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ensure_clean
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if test -n "$arg_addmerge_squash"
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@ -861,9 +849,7 @@ cmd_pull () {
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ensure_clean
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ensure_valid_ref_format "$2"
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git fetch "$@" || exit $?
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revs=FETCH_HEAD
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set -- $revs
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cmd_merge "$@"
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cmd_merge FETCH_HEAD
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}
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cmd_push () {
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