Fix commit search in all branches (#11849)

* Fix commit search in all branches

* comments

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/git/repo_commit.go

@@ -220,32 +220,49 @@ func (repo *Repository) commitsByRange(id SHA1, page, pageSize int) (*list.List,
 }
 
 func (repo *Repository) searchCommits(id SHA1, opts SearchCommitsOptions) (*list.List, error) {
+	// create new git log command with limit of 100 commis
 	cmd := NewCommand("log", id.String(), "-100", prettyLogFormat)
+	// ignore case
 	args := []string{"-i"}
+
+	// add authors if present in search query
 	if len(opts.Authors) > 0 {
 		for _, v := range opts.Authors {
 			args = append(args, "--author="+v)
 		}
 	}
+
+	// add commiters if present in search query
 	if len(opts.Committers) > 0 {
 		for _, v := range opts.Committers {
 			args = append(args, "--committer="+v)
 		}
 	}
+
+	// add time constraints if present in search query
 	if len(opts.After) > 0 {
 		args = append(args, "--after="+opts.After)
 	}
 	if len(opts.Before) > 0 {
 		args = append(args, "--before="+opts.Before)
 	}
+
+	// pretend that all refs along with HEAD were listed on command line as <commis>
+	// https://git-scm.com/docs/git-log#Documentation/git-log.txt---all
+	// note this is done only for command created above
 	if opts.All {
-		args = append(args, "--all")
+		cmd.AddArguments("--all")
 	}
+
+	// add remaining keywords from search string
+	// note this is done only for command created above
 	if len(opts.Keywords) > 0 {
 		for _, v := range opts.Keywords {
 			cmd.AddArguments("--grep=" + v)
 		}
 	}
+
+	// search for commits matching given constraints and keywords in commit msg
 	cmd.AddArguments(args...)
 	stdout, err := cmd.RunInDirBytes(repo.Path)
 	if err != nil {
@@ -254,12 +271,21 @@ func (repo *Repository) searchCommits(id SHA1, opts SearchCommitsOptions) (*list
 	if len(stdout) != 0 {
 		stdout = append(stdout, '\n')
 	}
+
+	// if there are any keywords (ie not commiter:, author:, time:)
+	// then let's iterate over them
 	if len(opts.Keywords) > 0 {
 		for _, v := range opts.Keywords {
+			// ignore anything below 4 characters as too unspecific
 			if len(v) >= 4 {
+				// create new git log command with 1 commit limit
 				hashCmd := NewCommand("log", "-1", prettyLogFormat)
+				// add previous arguments except for --grep and --all
 				hashCmd.AddArguments(args...)
+				// add keyword as <commit>
 				hashCmd.AddArguments(v)
+
+				// search with given constraints for commit matching sha hash of v
 				hashMatching, err := hashCmd.RunInDirBytes(repo.Path)
 				if err != nil || bytes.Contains(stdout, hashMatching) {
 					continue