Support search operators for commits search (#6479)

* Support searching commits with prefix syntax

For now, support auther: committer:
When more than one prefix is supplied is presented, the result is the union.
When different prefixes are supplied, the result is the intersection.

For example,
"author:alice author:bob"
=> the result is all commits authored by Alice OR Bob

"hello committer:alice"
=> the result is all commits committed by Alice AND has the keyword
'hello' in the message.

Note that there should NOT have any space after the colon(:) of the prefix.
For example,
"author:bill" => correct
"author: bill" => wrong

* Remove unneeded logging

* Add missing files of test repository

* Add missing repo_unit entries to test fixtures

* Update test cases

* Add tooltip for commits search button

* Update tooltip text

I have no idea about how to format it with line breaks.

* Make the usage example more real

* Add a test case

* Add new options struct for SearchCommits

* Prefer len(s) > 0 over s != ""

* Add NewSearchCommitsOptions

1 files changed, 6 insertions, 5 deletions

diff --git a/routers/repo/commit.go b/routers/repo/commit.go
index 6b99a1220d..a1e9b8bc5d 100644
--- a/routers/repo/commit.go
+++ b/routers/repo/commit.go
@@ -107,14 +107,15 @@ func SearchCommits(ctx *context.Context) {
 	ctx.Data["PageIsCommits"] = true
 	ctx.Data["PageIsViewCode"] = true
 
-	keyword := strings.Trim(ctx.Query("q"), " ")
-	if len(keyword) == 0 {
+	query := strings.Trim(ctx.Query("q"), " ")
+	if len(query) == 0 {
 		ctx.Redirect(ctx.Repo.RepoLink + "/commits/" + ctx.Repo.BranchNameSubURL())
 		return
 	}
-	all := ctx.QueryBool("all")
 
-	commits, err := ctx.Repo.Commit.SearchCommits(keyword, all)
+	all := ctx.QueryBool("all")
+	opts := git.NewSearchCommitsOptions(query, all)
+	commits, err := ctx.Repo.Commit.SearchCommits(opts)
 	if err != nil {
 		ctx.ServerError("SearchCommits", err)
 		return
@@ -124,7 +125,7 @@ func SearchCommits(ctx *context.Context) {
 	commits = models.ParseCommitsWithStatus(commits, ctx.Repo.Repository)
 	ctx.Data["Commits"] = commits
 
-	ctx.Data["Keyword"] = keyword
+	ctx.Data["Keyword"] = query
 	if all {
 		ctx.Data["All"] = "checked"
 	}