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Remove `seen` map from `getLastCommitForPaths` (#6807) 

Ensures correctly traversing the commit graph for all path and avoids
erroneously skipping some. Also preallocate some arrays to correct size
to prevent unnecessary reallocations.

Fixes #6708.

Signed-off-by: Filip Navara <filip.navara@gmail.com>
This commit is contained in:
Filip Navara 2019-04-30 15:27:41 +02:00 committed by Lauris BH
parent 9b9ec7847c
commit 55daee8d22
1 changed files with 2 additions and 8 deletions
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10
modules/git/commit_info.go
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@ -124,7 +124,6 @@ func getFileHashes(c *object.Commit, treePath string, paths []string) (map[strin
func getLastCommitForPaths(c *object.Commit, treePath string, paths []string) (map[string]*object.Commit, error) {
// We do a tree traversal with nodes sorted by commit time
seen := make(map[plumbing.Hash]bool)
heap := binaryheap.NewWith(func(a, b interface{}) int {
if a.(*commitAndPaths).commit.Committer.When.Before(b.(*commitAndPaths).commit.Committer.When) {
return 1
@ -202,15 +201,10 @@ func getLastCommitForPaths(c *object.Commit, treePath string, paths []string) (m
// Add the parent nodes along with remaining paths to the heap for further
// processing.
for j, parent := range parents {
if seen[parent.ID()] {
continue
}
seen[parent.ID()] = true
// Combine remainingPath with paths available on the parent branch
// and make union of them
var remainingPathsForParent []string
var newRemainingPaths []string
remainingPathsForParent := make([]string, 0, len(remainingPaths))
newRemainingPaths := make([]string, 0, len(remainingPaths))
for _, path := range remainingPaths {
if parentHashes[j][path] == current.hashes[path] {
remainingPathsForParent = append(remainingPathsForParent, path)