add API to list, kill and promote

examples/promote.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+for x in $@; do
+    echo "$x"
+done
+
+my_envs='GIT_DEPLOY_JOB_ID
+GIT_DEPLOY_PROMOTE_TO
+GIT_REF_NAME
+GIT_REF_TYPE
+GIT_REPO_OWNER
+GIT_REPO_NAME
+GIT_CLONE_URL'
+
+echo 'Doing "work" ...'
+sleep 5
+
+for x in $my_envs; do
+    echo "$x=${!x}"
+done

internal/webhooks/webhooks.go

@@ -13,29 +13,29 @@ import (
 //     Repo     ex: example
 //     Org      ex: example
 type Ref struct {
-	HTTPSURL string
-	SSHURL   string
-	Rev      string
-	Ref      string
-	RefType  string // tags, heads
-	RefName  string
-	Branch   string
-	Tag      string
-	Owner    string
-	Repo     string
+	HTTPSURL string `json:"clone_url"`
+	SSHURL   string `json:"-"`
+	Rev      string `json:"-"`
+	Ref      string `json:"-"`        // refs/tags/v0.0.1, refs/heads/master
+	RefType  string `json:"ref_type"` // tag, branch
+	RefName  string `json:"ref_name"`
+	Branch   string `json:"-"`
+	Tag      string `json:"-"`
+	Owner    string `json:"repo_owner"`
+	Repo     string `json:"repo_name"`
 }
 
 var Providers = make(map[string]func())
 var Webhooks = make(map[string]func(chi.Router))
 
-var hooks = make(chan Ref)
+var Hooks = make(chan Ref)
 
 func Hook(r Ref) {
-	hooks <- r
+	Hooks <- r
 }
 
 func Accept() Ref {
-	return <-hooks
+	return <-Hooks
 }
 
 func AddProvider(name string, initProvider func()) {

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"compress/flate"
 	"encoding/base64"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
@@ -44,13 +45,17 @@ type job struct {
 	ID        string // {HTTPSURL}#{BRANCH}
 	Cmd       *exec.Cmd
 	Ref       webhooks.Ref
+	CreatedAt time.Time
 }
 
 var jobs = make(map[string]*job)
+var killers = make(chan string)
 
 var runOpts *options.ServerConfig
 var runFlags *flag.FlagSet
 var initFlags *flag.FlagSet
+var promotions = []string{"production", "staging", "master"}
+var names = map[string]string{"master": "Development", "production": "Production", "staging": "Staging"}
 
 func init() {
 	runOpts = options.Server
@@ -64,7 +69,8 @@ func init() {
 		"path to serve, falls back to built-in web app")
 	runFlags.StringVar(
 		&runOpts.Exec, "exec", "",
-		"path to bash script to run with git info as arguments")
+		"path to ./scripts/{deploy.sh,promote.sh,etc}")
+	//"path to bash script to run with git info as arguments")
 }
 
 func main() {
@@ -97,7 +103,7 @@ func main() {
 	case "run":
 		_ = runFlags.Parse(args[2:])
 		if "" == runOpts.Exec {
-			fmt.Printf("--exec <path/to/script.sh> is a required flag")
+			fmt.Printf("--exec <path/to/scripts/> is a required flag")
 			os.Exit(1)
 			return
 		}
@@ -110,6 +116,20 @@ func main() {
 	}
 }
 
+// Job is the JSON we send back through the API about jobs
+type Job struct {
+	JobID     string       `json:"job_id"`
+	CreatedAt time.Time    `json:"created_at"`
+	Ref       webhooks.Ref `json:"ref"`
+	Promote   bool         `json:"promote,omitempty"`
+}
+
+// KillMsg describes which job to kill
+type KillMsg struct {
+	JobID string `json:"job_id"`
+	Kill  bool   `json:"kill"`
+}
+
 func serve() {
 	r := chi.NewRouter()
 
@@ -146,6 +166,96 @@ func serve() {
 
 	webhooks.RouteHandlers(r)
 
+	r.Route("/api/admin", func(r chi.Router) {
+		r.Use(func(next http.Handler) http.Handler {
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				// r.Body is always .Close()ed by Go's http server
+				r.Body = http.MaxBytesReader(w, r.Body, options.DefaultMaxBodySize)
+				// TODO admin auth middleware
+				log.Println("TODO: handle authentication")
+				next.ServeHTTP(w, r)
+			})
+		})
+
+		r.Get("/jobs", func(w http.ResponseWriter, r *http.Request) {
+			// again, possible race condition, but not one that much matters
+			jjobs := []Job{}
+			for jobID, job := range jobs {
+				jjobs = append(jjobs, Job{
+					JobID:     jobID,
+					Ref:       job.Ref,
+					CreatedAt: job.CreatedAt,
+				})
+			}
+			b, _ := json.Marshal(struct {
+				Success bool  `json:"success"`
+				Jobs    []Job `json:"jobs"`
+			}{
+				Success: true,
+				Jobs:    jjobs,
+			})
+			w.Write(append(b, '\n'))
+		})
+		r.Post("/jobs", func(w http.ResponseWriter, r *http.Request) {
+			defer func() {
+				_ = r.Body.Close()
+			}()
+
+			decoder := json.NewDecoder(r.Body)
+			msg := &KillMsg{}
+			if err := decoder.Decode(msg); nil != err {
+				log.Println("kill job invalid json:", err)
+				http.Error(w, "invalid json body", http.StatusBadRequest)
+				return
+			}
+
+			w.Header().Set("Content-Type", "application/json")
+			// possible race condition, but not the kind that should matter
+			if _, exists := jobs[msg.JobID]; !exists {
+				w.Write([]byte(
+					`{ "success": false, "error": "job does not exist" }` + "\n",
+				))
+				return
+			}
+
+			// killing a job *should* always succeed ...right?
+			killers <- msg.JobID
+			w.Write([]byte(
+				`{ "success": true }` + "\n",
+			))
+		})
+
+		r.Post("/promote", func(w http.ResponseWriter, r *http.Request) {
+			decoder := json.NewDecoder(r.Body)
+			msg := &webhooks.Ref{}
+			if err := decoder.Decode(msg); nil != err {
+				log.Println("promotion job invalid json:", err)
+				http.Error(w, "invalid json body", http.StatusBadRequest)
+				return
+			}
+			if "" == msg.HTTPSURL || "" == msg.RefName {
+				log.Println("promotion job incomplete json", msg)
+				http.Error(w, "incomplete json body", http.StatusBadRequest)
+				return
+			}
+
+			n := -2
+			for i := range promotions {
+				if promotions[i] == msg.RefName {
+					n = i - 1
+					break
+				}
+			}
+			if n < 0 {
+				log.Println("promotion job invalid: cannot promote:", n)
+				http.Error(w, "invalid promotion", http.StatusBadRequest)
+				return
+			}
+
+			promoteTo := promotions[n]
+			runPromote(*msg, promoteTo)
+		})
+	})
 	r.Get("/*", staticHandler)
 
 	fmt.Println("Listening for http (with reasonable timeouts) on", runOpts.Addr)
@@ -159,16 +269,33 @@ func serve() {
 	}
 
 	go func() {
+		// TODO read from backlog
 		for {
-			hook := webhooks.Accept()
-			// TODO os.Exec
+			//hook := webhooks.Accept()
+			select {
+			case hook := <-webhooks.Hooks:
+				runHook(hook)
+			case jobID := <-killers:
+				kill(jobID)
+			}
+		}
+	}()
+
+	if err := srv.ListenAndServe(); nil != err {
+		fmt.Fprintf(os.Stderr, "%s", err)
+		os.Exit(1)
+		return
+	}
+}
+
+func runHook(hook webhooks.Ref) {
 	fmt.Printf("%#v\n", hook)
-			jobID := base64.URLEncoding.EncodeToString([]byte(
+	jobID := base64.RawURLEncoding.EncodeToString([]byte(
 		fmt.Sprintf("%s#%s", hook.HTTPSURL, hook.RefName),
 	))
 
 	args := []string{
-				runOpts.Exec,
+		runOpts.Exec + "/deploy.sh",
 		jobID,
 		hook.RefName,
 		hook.RefType,
@@ -206,20 +333,105 @@ func serve() {
 		ID:        jobID,
 		Cmd:       cmd,
 		Ref:       hook,
+		CreatedAt: time.Now(),
 	}
 
 	go func() {
 		log.Printf("git-deploy job for %s#%s started\n", hook.HTTPSURL, hook.RefName)
 		_ = cmd.Wait()
-				delete(jobs, jobID)
+		killers <- jobID
 		log.Printf("git-deploy job for %s#%s finished\n", hook.HTTPSURL, hook.RefName)
+		// TODO check for backlog
 	}()
-		}
-	}()
+}
 
-	if err := srv.ListenAndServe(); nil != err {
-		fmt.Fprintf(os.Stderr, "%s", err)
-		os.Exit(1)
+func kill(jobID string) {
+	job, exists := jobs[jobID]
+	if !exists {
 		return
 	}
+	delete(jobs, jobID)
+
+	if nil != job.Cmd.ProcessState {
+		// is not yet finished
+		if nil != job.Cmd.Process {
+			// but definitely was started
+			err := job.Cmd.Process.Kill()
+			log.Println("error killing job:", err)
+		}
+	}
+}
+
+func runPromote(hook webhooks.Ref, promoteTo string) {
+	// TODO create an origin-branch tag with a timestamp?
+	jobID1 := base64.RawURLEncoding.EncodeToString([]byte(
+		fmt.Sprintf("%s#%s", hook.HTTPSURL, hook.RefName),
+	))
+	jobID2 := base64.RawURLEncoding.EncodeToString([]byte(
+		fmt.Sprintf("%s#%s", hook.HTTPSURL, promoteTo),
+	))
+
+	args := []string{
+		runOpts.Exec + "/promote.sh",
+		jobID1,
+		promoteTo,
+		hook.RefName,
+		hook.RefType,
+		hook.Owner,
+		hook.Repo,
+		hook.HTTPSURL,
+	}
+	cmd := exec.Command("bash", args...)
+
+	env := os.Environ()
+	envs := []string{
+		"GIT_DEPLOY_JOB_ID=" + jobID1,
+		"GIT_DEPLOY_PROMOTE_TO=" + promoteTo,
+		"GIT_REF_NAME=" + hook.RefName,
+		"GIT_REF_TYPE=" + hook.RefType,
+		"GIT_REPO_OWNER=" + hook.Owner,
+		"GIT_REPO_NAME=" + hook.Repo,
+		"GIT_CLONE_URL=" + hook.HTTPSURL,
+	}
+	cmd.Env = append(env, envs...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if _, exists := jobs[jobID1]; exists {
+		// TODO put promote in backlog
+		log.Printf("git-deploy job already started for %s#%s\n", hook.HTTPSURL, hook.RefName)
+		return
+	}
+	if _, exists := jobs[jobID2]; exists {
+		// TODO put promote in backlog
+		log.Printf("git-deploy job already started for %s#%s\n", hook.HTTPSURL, promoteTo)
+		return
+	}
+
+	if err := cmd.Start(); nil != err {
+		log.Printf("git-deploy exec error: %s\n", err)
+		return
+	}
+
+	jobs[jobID1] = &job{
+		ID:        jobID2,
+		Cmd:       cmd,
+		Ref:       hook,
+		CreatedAt: time.Now(),
+	}
+	jobs[jobID2] = &job{
+		ID:        jobID2,
+		Cmd:       cmd,
+		Ref:       hook,
+		CreatedAt: time.Now(),
+	}
+
+	go func() {
+		log.Printf("git-deploy promote for %s#%s started\n", hook.HTTPSURL, hook.RefName)
+		_ = cmd.Wait()
+		killers <- jobID1
+		killers <- jobID2
+		log.Printf("git-deploy promote for %s#%s finished\n", hook.HTTPSURL, hook.RefName)
+		// TODO check for backlog
+	}()
 }