diff options
Diffstat (limited to 'contrib/subtree/git-subtree.sh')
| -rwxr-xr-x | contrib/subtree/git-subtree.sh | 129 |
1 files changed, 83 insertions, 46 deletions
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh index d3f39a8..147201d 100755 --- a/contrib/subtree/git-subtree.sh +++ b/contrib/subtree/git-subtree.sh @@ -231,12 +231,14 @@ cache_miss () { } check_parents () { - missed=$(cache_miss "$@") + missed=$(cache_miss "$1") + local indent=$(($2 + 1)) for miss in $missed do if ! test -r "$cachedir/notree/$miss" then debug " incorrect order: $miss" + process_split_commit "$miss" "" "$indent" fi done } @@ -340,7 +342,12 @@ find_existing_splits () { revs="$2" main= sub= - git log --grep="^git-subtree-dir: $dir/*\$" \ + local grep_format="^git-subtree-dir: $dir/*\$" + if test -n "$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' $revs | while read a b junk do @@ -534,6 +541,7 @@ copy_or_skip () { nonidentical= p= gotparents= + copycommit= for parent in $newparents do ptree=$(toptree_for_commit $parent) || exit $? @@ -541,7 +549,24 @@ copy_or_skip () { if test "$ptree" = "$tree" then # an identical parent could be used in place of this rev. - identical="$parent" + 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 @@ -564,7 +589,6 @@ copy_or_skip () { fi done - copycommit= if test -n "$identical" && test -n "$nonidentical" then extras=$(git rev-list --count $identical..$nonidentical) @@ -598,6 +622,58 @@ ensure_valid_ref_format () { die "'$1' does not look like a ref" } +process_split_commit () { + local rev="$1" + local parents="$2" + local indent=$3 + + 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: $rev" + exists=$(cache_get "$rev") + if test -n "$exists" + then + debug " prior: $exists" + return + fi + createcount=$(($createcount + 1)) + debug " parents: $parents" + check_parents "$parents" "$indent" + newparents=$(cache_get $parents) + debug " newparents: $newparents" + + tree=$(subtree_for_commit "$rev" "$dir") + debug " tree is: $tree" + + # ugly. is there no better way to tell if this is a subtree + # vs. a mainline commit? Does it matter? + if test -z "$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 "$rev" +} + cmd_add () { if test -e "$dir" then @@ -689,12 +765,7 @@ cmd_split () { done fi - if test -n "$ignore_joins" - then - unrevs= - else - unrevs="$(find_existing_splits "$dir" "$revs")" - fi + unrevs="$(find_existing_splits "$dir" "$revs")" # We can't restrict rev-list to only $dir here, because some of our # parents have the $dir contents the root, and those won't match. @@ -703,45 +774,11 @@ cmd_split () { revmax=$(eval "$grl" | wc -l) revcount=0 createcount=0 + extracount=0 eval "$grl" | while read rev parents do - revcount=$(($revcount + 1)) - progress "$revcount/$revmax ($createcount)" - debug "Processing commit: $rev" - exists=$(cache_get "$rev") - if test -n "$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" - - check_parents $parents - - # ugly. is there no better way to tell if this is a subtree - # vs. a mainline commit? Does it matter? - if test -z "$tree" - then - set_notree "$rev" - if test -n "$newparents" - then - cache_set "$rev" "$rev" - fi - 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 "$rev" + process_split_commit "$rev" "$parents" 0 done || exit $? latest_new=$(cache_get latest_new) |