Include directory in slack webhook message

Fixes: https://github.com/runatlantis/atlantis/issues/660

server/events/project_command_runner.go

@@ -240,6 +240,7 @@ func (p *DefaultProjectCommandRunner) doApply(ctx models.ProjectCommandContext)
 		Repo:      ctx.BaseRepo,
 		Pull:      ctx.Pull,
 		Success:   err == nil,
+		Directory: ctx.RepoRelDir,
 	})
 	if err != nil {
 		return "", "", fmt.Errorf("%s\n%s", err, strings.Join(outputs, "\n"))

server/events/webhooks/slack_client.go

@@ -98,6 +98,11 @@ func (d *DefaultSlackClient) createAttachments(applyResult ApplyResult) []slack.
 	}
 
 	text := fmt.Sprintf("Apply %s for <%s|%s>", successWord, applyResult.Pull.URL, applyResult.Repo.FullName)
+	directory := applyResult.Directory
+	if directory == "." {
+		directory = "/"
+	}
+
 	attachment := slack.Attachment{
 		Color: colour,
 		Text:  text,
@@ -112,6 +117,11 @@ func (d *DefaultSlackClient) createAttachments(applyResult ApplyResult) []slack.
 				Value: applyResult.User.Username,
 				Short: true,
 			},
+			{
+				Title: "Directory",
+				Value: directory,
+				Short: true,
+			},
 		},
 	}
 	return []slack.Attachment{attachment}

server/events/webhooks/slack_client_test.go

@@ -109,6 +109,11 @@ func TestPostMessage_Success(t *testing.T) {
 				Value: result.User.Username,
 				Short: true,
 			},
+			{
+				Title: "Directory",
+				Value: result.Directory,
+				Short: true,
+			},
 		},
 	}}
 	expParams.AsUser = false
@@ -148,6 +153,11 @@ func TestPostMessage_Error(t *testing.T) {
 				Value: result.User.Username,
 				Short: true,
 			},
+			{
+				Title: "Directory",
+				Value: result.Directory,
+				Short: true,
+			},
 		},
 	}}
 	expParams.AsUser = false

server/events/webhooks/webhooks.go

@@ -41,6 +41,7 @@ type ApplyResult struct {
 	Pull      models.PullRequest
 	User      models.User
 	Success   bool
+	Directory string
 }
 
 // MultiWebhookSender sends multiple webhooks for each one it's configured for.