ability to get last build before N

controller/build.go

@@ -218,11 +218,16 @@ func PostBuild(c *gin.Context) {
 
 	c.JSON(202, build)
 
+	// get the previous build so taht we can send
+	// on status change notifications
+	last, _ := model.GetBuildLastBefore(db, repo, build.Branch, build.ID)
+
 	engine_ := context.Engine(c)
 	go engine_.Schedule(&engine.Task{
 		User:      user,
 		Repo:      repo,
 		Build:     build,
+		BuildPrev: last,
 		Jobs:      jobs,
 		Keys:      key,
 		Netrc:     netrc,

controller/hook.go

@@ -203,7 +203,7 @@ func PostHook(c *gin.Context) {
 
 	// get the previous build so taht we can send
 	// on status change notifications
-	last, _ := model.GetBuildLast(db, repo, build.Branch)
+	last, _ := model.GetBuildLastBefore(db, repo, build.Branch, build.ID)
 
 	engine_ := context.Engine(c)
 	go engine_.Schedule(&engine.Task{

model/build.go

@@ -66,6 +66,12 @@ func GetBuildLast(db meddler.DB, repo *Repo, branch string) (*Build, error) {
 	return build, err
 }
 
+func GetBuildLastBefore(db meddler.DB, repo *Repo, branch string, number int64) (*Build, error) {
+	var build = new(Build)
+	var err = meddler.QueryRow(db, build, database.Rebind(buildLastBeforeQuery), repo.ID, branch, number)
+	return build, err
+}
+
 func GetBuildList(db meddler.DB, repo *Repo) ([]*Build, error) {
 	var builds = []*Build{}
 	var err = meddler.QueryAll(db, &builds, database.Rebind(buildListQuery), repo.ID)
@@ -125,6 +131,16 @@ ORDER BY build_number DESC
 LIMIT 1
 `
 
+const buildLastBeforeQuery = `
+SELECT *
+FROM builds
+WHERE build_repo_id = ?
+  AND build_branch  = ?
+  AND build_id < ?
+ORDER BY build_number DESC
+LIMIT 1
+`
+
 const buildCommitQuery = `
 SELECT *
 FROM builds

model/build_test.go

@@ -158,7 +158,7 @@ func TestBuild(t *testing.T) {
 			g.Assert(build2.Branch).Equal(getbuild.Branch)
 		})
 
-		g.It("Should Get a Build by Commit", func() {
+		g.It("Should Get the last Build", func() {
 			build1 := &Build{
 				RepoID: 1,
 				Status: StatusFailure,
@@ -185,6 +185,41 @@ func TestBuild(t *testing.T) {
 			g.Assert(build2.Commit).Equal(getbuild.Commit)
 		})
 
+		g.It("Should Get the last Build Before Build N", func() {
+			build1 := &Build{
+				RepoID: 1,
+				Status: StatusFailure,
+				Branch: "master",
+				Commit: "85f8c029b902ed9400bc600bac301a0aadb144ac",
+			}
+			build2 := &Build{
+				RepoID: 1,
+				Status: StatusSuccess,
+				Branch: "master",
+				Commit: "85f8c029b902ed9400bc600bac301a0aadb144aa",
+			}
+			build3 := &Build{
+				RepoID: 1,
+				Status: StatusRunning,
+				Branch: "master",
+				Commit: "85f8c029b902ed9400bc600bac301a0aadb144aa",
+			}
+			err1 := CreateBuild(db, build1, []*Job{}...)
+			err2 := CreateBuild(db, build2, []*Job{}...)
+			err3 := CreateBuild(db, build3, []*Job{}...)
+			getbuild, err4 := GetBuildLastBefore(db, &Repo{ID: 1}, build3.Branch, build3.ID)
+			g.Assert(err1 == nil).IsTrue()
+			g.Assert(err2 == nil).IsTrue()
+			g.Assert(err3 == nil).IsTrue()
+			g.Assert(err4 == nil).IsTrue()
+			g.Assert(build2.ID).Equal(getbuild.ID)
+			g.Assert(build2.RepoID).Equal(getbuild.RepoID)
+			g.Assert(build2.Number).Equal(getbuild.Number)
+			g.Assert(build2.Status).Equal(getbuild.Status)
+			g.Assert(build2.Branch).Equal(getbuild.Branch)
+			g.Assert(build2.Commit).Equal(getbuild.Commit)
+		})
+
 		g.It("Should get recent Builds", func() {
 			build1 := &Build{
 				RepoID: 1,