add exec script

AUTHORS

@@ -1 +1,2 @@
+Ryan Burnette <ryan.burnette@gmail.com> (https://ryanburnette.com)
 AJ ONeal <aj@therootcompany.com> (https://therootcompany.com)

LICENSE

@@ -1 +1,3 @@
-Copyright 2020 AJ ONeal. All rights reserved.
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at https://mozilla.org/MPL/2.0/.

README.md

@@ -2,6 +2,32 @@
 
 **git-deploy** is an app for handling continuous deployment of static websites.
 
+## Usage
+
+```bash
+echo 'GITHUB_SECRET=xxxxxxx' >> .env
+./git-deploy init
+./git-deploy run --listen :3000 --serve-path ./overrides --exec ./path/to/script.sh
+```
+
+To manage `git credentials`
+see [The Vanilla DevOps Git Credentials Cheatsheet][1]
+
+[1]: https://coolaj86.com/articles/vanilla-devops-git-credentials-cheatsheet/
+
+## Git Info
+
+The exec script will receive the parent environment as well as
+
+```bash
+GIT_DEPLOY_JOB_ID=xxxxxx
+GIT_REF_NAME=master
+GIT_REF_TYPE=branch
+GIT_REPO_OWNER=example
+GIT_REPO_NAME=example
+GIT_CLONE_URL=https://github.com/example/example
+```
+
 ## Build
 
 ```bash
@@ -18,10 +44,6 @@ go generate -mod=vendor ./...
 go build -mod=vendor .
 ```
 
-```bash
-./git-deploy run --listen :3000 --serve-path ./overrides
-```
-
 ## Add Webhooks
 
 To add a webhook you'll first need a secret
@@ -104,4 +126,8 @@ crypto
 
 ## License
 
-Copyright 2020. All rights reserved.
+Copyright 2020 The git-deploy Authors
+
+This Source Code Form is subject to the terms of the Mozilla Public \
+License, v. 2.0. If a copy of the MPL was not distributed with this \
+file, You can obtain one at https://mozilla.org/MPL/2.0/.

example.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+for x in $@; do
+    echo "$x"
+done
+
+my_envs='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/options/options.go

@@ -11,6 +11,7 @@ type ServerConfig struct {
 	TrustProxy bool
 	Compress   bool
 	ServePath  string
+	Exec       string
 }
 
 var ServerFlags *flag.FlagSet

internal/webhooks/github/github.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strings"
 
 	"git.ryanburnette.com/ryanburnette/git-deploy/internal/options"
 	"git.ryanburnette.com/ryanburnette/git-deploy/internal/webhooks"
@@ -63,16 +64,33 @@ func InitWebhook(providername string, secret *string, envname string) func() {
 
 				switch e := event.(type) {
 				case *github.PushEvent:
-					// this is a commit push, do something with it
+					var branch string
+					var tag string
 
 					ref := e.GetRef() // *e.Ref
-					branch := ref[len("refs/heads/"):]
+					parts := strings.Split(ref, "/")
+					refType := parts[1]
+					prefixLen := len("refs/") + len(refType) + len("/")
+					refName := ref[prefixLen:]
+					switch refType {
+					case "tags":
+						refType = "tag"
+						tag = refName
+					case "heads":
+						refType = "branch"
+						branch = refName
+					}
 					webhooks.Hook(webhooks.Ref{
+						HTTPSURL: e.GetRepo().GetCloneURL(),
+						SSHURL:   e.GetRepo().GetSSHURL(),
 						Rev:      e.GetAfter(), // *e.After
 						Ref:      ref,
+						RefType:  refType,
+						RefName:  refName,
 						Branch:   branch,
+						Tag:      tag,
 						Repo:     e.GetRepo().GetName(), // *e.Repo.Name
-						Org:    e.GetRepo().GetOrganization(), // *e.Repo.Organization
+						Owner:    e.GetRepo().GetOwner().GetLogin(),
 					})
 				/*
 					case *github.PullRequestEvent:

internal/webhooks/webhooks.go

@@ -17,9 +17,12 @@ type Ref struct {
 	SSHURL   string
 	Rev      string
 	Ref      string
+	RefType  string // tags, heads
+	RefName  string
 	Branch   string
+	Tag      string
+	Owner    string
 	Repo     string
-	Org      string
 }
 
 var Providers = make(map[string]func())

main.go

@@ -2,10 +2,13 @@ package main
 
 import (
 	"compress/flate"
+	"encoding/base64"
 	"flag"
 	"fmt"
+	"log"
 	"net/http"
 	"os"
+	"os/exec"
 	"time"
 
 	"git.ryanburnette.com/ryanburnette/git-deploy/assets"
@@ -37,6 +40,14 @@ func ver() {
 	fmt.Printf("%s v%s %s (%s)\n", name, version, commit[:7], date)
 }
 
+type job struct {
+	ID  string // {HTTPSURL}#{BRANCH}
+	Cmd *exec.Cmd
+	Ref webhooks.Ref
+}
+
+var jobs = make(map[string]*job)
+
 var runOpts *options.ServerConfig
 var runFlags *flag.FlagSet
 var initFlags *flag.FlagSet
@@ -48,7 +59,12 @@ func init() {
 	runFlags.StringVar(&runOpts.Addr, "listen", ":3000", "the address and port on which to listen")
 	runFlags.BoolVar(&runOpts.TrustProxy, "trust-proxy", false, "trust X-Forwarded-For header")
 	runFlags.BoolVar(&runOpts.Compress, "compress", true, "enable compression for text,html,js,css,etc")
-	runFlags.StringVar(&runOpts.ServePath, "serve-path", "", "path to serve, falls back to built-in web app")
+	runFlags.StringVar(
+		&runOpts.ServePath, "serve-path", "",
+		"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")
 }
 
 func main() {
@@ -80,6 +96,11 @@ func main() {
 		initFlags.Parse(args[2:])
 	case "run":
 		runFlags.Parse(args[2:])
+		if "" == runOpts.Exec {
+			fmt.Printf("--exec <path/to/script.sh> is a required flag")
+			os.Exit(1)
+			return
+		}
 		webhooks.MustRegisterAll()
 		serve()
 	default:
@@ -141,9 +162,58 @@ func serve() {
 		for {
 			hook := webhooks.Accept()
 			// TODO os.Exec
-			fmt.Println(hook.Org)
-			fmt.Println(hook.Repo)
-			fmt.Println(hook.Branch)
+			fmt.Printf("%#v\n", hook)
+			jobID := base64.URLEncoding.EncodeToString([]byte(
+				fmt.Sprintf("%s#%s", hook.HTTPSURL, hook.RefName),
+			))
+
+			args := []string{
+				runOpts.Exec,
+				jobID,
+				hook.RefName,
+				hook.RefType,
+				hook.Owner,
+				hook.Repo,
+				hook.HTTPSURL,
+			}
+			cmd := exec.Command("bash", args...)
+
+			env := os.Environ()
+			envs := []string{
+				"GIT_DEPLOY_JOB_ID=" + jobID,
+				"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[jobID]; exists {
+				// TODO put job in backlog
+				log.Printf("git-deploy job already started for %s#%s\n", hook.HTTPSURL, hook.RefName)
+				return
+			}
+
+			if err := cmd.Start(); nil != err {
+				log.Printf("git-deploy exec error: %s\n", err)
+				return
+			}
+
+			jobs[jobID] = &job{
+				ID:  jobID,
+				Cmd: cmd,
+				Ref: hook,
+			}
+
+			go func() {
+				log.Printf("git-deploy job for %s#%s started\n", hook.HTTPSURL, hook.RefName)
+				cmd.Wait()
+				delete(jobs, jobID)
+				log.Printf("git-deploy job for %s#%s finished\n", hook.HTTPSURL, hook.RefName)
+			}()
 		}
 	}()