ooaklee/Add-mattermost-notifier-integration

README.md

@@ -25,6 +25,8 @@ You can do this by using this command.
 
 <img src="./misc/images/3.png" width="600">
 
+<img src="./misc/images/4.png" width="500">
+
 ## Installation
 
 Grab the binary from GitHub Releases (Recommended)
@@ -313,6 +315,89 @@ terraform:
 ```
 </details>
 
+
+<details>
+<summary>For Mattermost</summary>
+
+```yaml
+---
+ci: circleci
+notifier:
+  mattermost:
+    webhook: $MATTERMOST_WEBHOOK
+    channel: $MATTERMOST_CHANNEL
+    bot: $MATTERMOST_BOT_NAME
+terraform:
+  fmt:
+    template: |
+      {{if .Message}}**`Message`**: {{ .Message }}{{end}}
+      **`Context`**:  [*(Click me) Explore the change(s) further*]( {{ .Link }} )
+
+      {{if .Result}}
+      ## Result
+      ```
+      {{ .Result }}
+      ```
+      {{end}}
+
+      ## Details
+
+      View the summary below
+
+      ```
+      {{ .Body }}
+      ```
+
+  plan:
+    template: |
+      {{if .Message}}**`Message`**: {{ .Message }}{{end}}
+      **`Context`**:  [*(Click me) Explore the change(s) further*]( {{ .Link }} )
+
+      {{if .Result}}
+      ## Result
+      ```
+      {{ .Result }}
+      ```
+      {{end}}
+
+      ## Details
+
+      View the summary below
+
+      ```
+      {{ .Body }}
+      ```
+
+    when_destroy:
+      template: |
+        ## :warning: WARNING: Resource Deletion will happen :warning:
+
+        This plan contains **resource deletion**. Please check the plan result very carefully!
+  apply:
+    template: |
+      {{if .Message}}**`Message`**: {{ .Message }}{{end}}
+      **`Context`**:  [*(Click me) Explore the change(s) further*]( {{ .Link }} )
+
+      {{if .Result}}
+      ## Result
+      ```
+      {{ .Result }}
+      ```
+      {{end}}
+
+      ## Details
+
+      View the summary below
+
+      ```
+      {{ .Body }}
+      ```
+```
+
+> Note, for `notifier.mattermost.bot` to work override, you must ensure you enable application/ webhook overrides on your Mattermost system. If you do not, the webhook will, by default, take the name of its creator. If you cannot enable application/ webhook overrides, you might have to consider creating a dedicated `tfnotify` Mattermost user account.
+
+</details>
+
 <details>
 <summary>For Slack</summary>
 

config/config.go

@@ -21,10 +21,11 @@ type Config struct {
 
 // Notifier is a notification notifier
 type Notifier struct {
-	Github   GithubNotifier   `yaml:"github"`
-	Gitlab   GitlabNotifier   `yaml:"gitlab"`
-	Slack    SlackNotifier    `yaml:"slack"`
-	Typetalk TypetalkNotifier `yaml:"typetalk"`
+	Github     GithubNotifier     `yaml:"github"`
+	Gitlab     GitlabNotifier     `yaml:"gitlab"`
+	Slack      SlackNotifier      `yaml:"slack"`
+	Typetalk   TypetalkNotifier   `yaml:"typetalk"`
+	Mattermost MattermostNotifier `yaml:"mattermost"`
 }
 
 // GithubNotifier is a notifier for GitHub
@@ -54,6 +55,13 @@ type SlackNotifier struct {
 	Bot     string `yaml:"bot"`
 }
 
+// MattermostNotifier is a notifier for Mattermost
+type MattermostNotifier struct {
+	Webhook string `yaml:"webhook"`
+	Channel string `yaml:"channel"`
+	Bot     string `yaml:"bot"`
+}
+
 // TypetalkNotifier is a notifier for Typetalk
 type TypetalkNotifier struct {
 	Token   string `yaml:"token"`
@@ -178,6 +186,17 @@ func (cfg *Config) Validation() error {
 			return fmt.Errorf("slack channel id is missing")
 		}
 	}
+
+	if cfg.isDefinedMattermost() {
+		if cfg.Notifier.Mattermost.Channel == "" {
+			fmt.Println("[info] mattermost channel id not provided. Targetting webhook's default channel")
+		}
+
+		if cfg.Notifier.Mattermost.Webhook == "" {
+			return fmt.Errorf("mattermost webhook is missing")
+		}
+	}
+
 	if cfg.isDefinedTypetalk() {
 		if cfg.Notifier.Typetalk.TopicID == "" {
 			return fmt.Errorf("typetalk topic id is missing")
@@ -200,6 +219,11 @@ func (cfg *Config) isDefinedGitlab() bool {
 	return cfg.Notifier.Gitlab != (GitlabNotifier{})
 }
 
+func (cfg *Config) isDefinedMattermost() bool {
+	// not empty
+	return cfg.Notifier.Mattermost != (MattermostNotifier{})
+}
+
 func (cfg *Config) isDefinedSlack() bool {
 	// not empty
 	return cfg.Notifier.Slack != (SlackNotifier{})
@@ -218,6 +242,9 @@ func (cfg *Config) GetNotifierType() string {
 	if cfg.isDefinedGitlab() {
 		return "gitlab"
 	}
+	if cfg.isDefinedMattermost() {
+		return "mattermost"
+	}
 	if cfg.isDefinedSlack() {
 		return "slack"
 	}

config/config_test.go

@@ -41,6 +41,11 @@ func TestLoadFile(t *testing.T) {
 						Token:   "",
 						TopicID: "",
 					},
+					Mattermost: MattermostNotifier{
+						Webhook: "",
+						Channel: "",
+						Bot:     "",
+					},
 				},
 				Terraform: Terraform{
 					Default: Default{
@@ -86,6 +91,11 @@ func TestLoadFile(t *testing.T) {
 						Token:   "",
 						TopicID: "",
 					},
+					Mattermost: MattermostNotifier{
+						Webhook: "",
+						Channel: "",
+						Bot:     "",
+					},
 				},
 				Terraform: Terraform{
 					Default: Default{
@@ -143,6 +153,11 @@ func TestLoadFile(t *testing.T) {
 						Token:   "",
 						TopicID: "",
 					},
+					Mattermost: MattermostNotifier{
+						Webhook: "",
+						Channel: "",
+						Bot:     "",
+					},
 				},
 				Terraform: Terraform{
 					Default: Default{
@@ -245,6 +260,14 @@ func TestValidation(t *testing.T) {
 			contents: []byte("ci: circleci\nnotifier:\n  github:\n    token: token\n"),
 			expected: "repository owner is missing",
 		},
+		{
+			contents: []byte("ci: circleci\nnotifier:\n  mattermost:\n    channel: test-channel\n"),
+			expected: "mattermost webhook is missing",
+		},
+		{
+			contents: []byte("ci: circleci\nnotifier:\n  mattermost:\n    webhook: webhook\n"),
+			expected: "",
+		},
 		{
 			contents: []byte(`
 ci: circleci
@@ -279,6 +302,25 @@ notifier:
 		{
 			contents: []byte(`
 ci: circleci
+notifier:
+  mattermost:
+    channel: channel
+`),
+			expected: "mattermost webhook is missing",
+		},
+		{
+			contents: []byte(`
+ci: circleci
+notifier:
+  mattermost:
+    webhook: webhook
+    channel: channel
+`),
+			expected: "",
+		},
+		{
+			contents: []byte(`
+ci: circleci
 notifier:
   slack:
     token: token
@@ -403,6 +445,10 @@ func TestGetNotifierType(t *testing.T) {
 			contents: []byte("repository:\n  owner: a\n  name: b\nci: gitlabci\nnotifier:\n  gitlab:\n    token: token\n"),
 			expected: "gitlab",
 		},
+		{
+			contents: []byte("repository:\n  owner: a\n  name: b\nci: circleci\nnotifier:\n  mattermost:\n    webhook: webhook\n"),
+			expected: "mattermost",
+		},
 	}
 	for _, testCase := range testCases {
 		cfg, err := helperLoadConfig(testCase.contents)

go.mod

@@ -3,14 +3,19 @@ module github.com/mercari/tfnotify
 go 1.12
 
 require (
+	github.com/ashwanthkumar/slack-go-webhook v0.0.0-20200209025033-430dd4e66960
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/elazarl/goproxy v0.0.0-20221015165544-a0805db90819 // indirect
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/kr/pretty v0.2.0 // indirect
 	github.com/lestrrat-go/pdebug v0.0.0-20210111095411-35b07dbf089b // indirect
 	github.com/lestrrat-go/slack v0.0.0-20190827134815-1aaae719550a
 	github.com/mattn/go-colorable v0.1.12
 	github.com/nulab/go-typetalk v2.1.1+incompatible
+	github.com/parnurzeal/gorequest v0.2.16 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/smartystreets/goconvey v1.7.2 // indirect
+	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli v1.22.9
 	github.com/xanzy/go-gitlab v0.69.0
 	golang.org/x/net v0.0.0-20220708220712-1185a9018129 // indirect
@@ -19,4 +24,5 @@ require (
 	golang.org/x/time v0.0.0-20220609170525-579cf78fd858 // indirect
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.4.0
+	moul.io/http2curl v1.0.0 // indirect
 )

go.sum

@@ -58,6 +58,8 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/ashwanthkumar/slack-go-webhook v0.0.0-20200209025033-430dd4e66960 h1:MIEURpsIpyLyy+dZ+GnL8T5P49Tco0ik9cYaUQNnAxE=
+github.com/ashwanthkumar/slack-go-webhook v0.0.0-20200209025033-430dd4e66960/go.mod h1:97O1qkjJBHSSaWJxsTShRIeFy0HWiygk+jnugO9aX3I=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
@@ -81,6 +83,10 @@ github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46t
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/elazarl/goproxy v0.0.0-20221015165544-a0805db90819 h1:RIB4cRk+lBqKK3Oy0r2gRX4ui7tuhiZq2SuTtTCi0/0=
+github.com/elazarl/goproxy v0.0.0-20221015165544-a0805db90819/go.mod h1:Ro8st/ElPeALwNFlcTpWmkr6IoMFfkjXAvTHpevnDsM=
+github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2 h1:dWB6v3RcOy03t/bUadywsbyrQwCqZeNIEX6M1OtSZOM=
+github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2/go.mod h1:gNh8nYJoAm43RfaxurUnxr+N1PwuFV3ZMl/efxlIlY8=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
@@ -177,6 +183,8 @@ github.com/googleapis/gax-go/v2 v2.2.0/go.mod h1:as02EH8zWkzwUoLbBaFeQ+arQaj/Oth
 github.com/googleapis/gax-go/v2 v2.3.0/go.mod h1:b8LNqSzNabLiUpXKkY7HAR5jr6bIT99EXz9pXxye9YM=
 github.com/googleapis/gax-go/v2 v2.4.0/go.mod h1:XOTVJ59hdnfJLIP/dh8n5CGryZR2LxK9wbMD5+iXC6c=
 github.com/googleapis/go-type-adapters v1.0.0/go.mod h1:zHW75FOG2aur7gAO2B+MLby+cLsWGBF62rFAi7WjWO4=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
@@ -192,6 +200,8 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
@@ -210,18 +220,25 @@ github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
 github.com/nulab/go-typetalk v2.1.1+incompatible h1:XdLjQuNVh77Wp7Qu4w8fqFdptxozGyy+Cq7n7/uUvMw=
 github.com/nulab/go-typetalk v2.1.1+incompatible/go.mod h1:m2ResEyH1dMB+0oMK/iCwd/qzCdCT+WdncQILJo/7t4=
+github.com/parnurzeal/gorequest v0.2.16 h1:T/5x+/4BT+nj+3eSknXmCTnEVGSzFzPGdpqmUVVZXHQ=
+github.com/parnurzeal/gorequest v0.2.16/go.mod h1:3Kh2QUMJoqw3icWAecsyzkpY7UzRfDhbRdTjtNwNiUE=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
+github.com/rogpeppe/go-charset v0.0.0-20180617210344-2471d30d28b4/go.mod h1:qgYeAmZ5ZIpBWTGllZSQnw97Dj+woV0toclVaRGI8pc=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N3yZFZkDFs=
+github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
+github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg=
+github.com/smartystreets/goconvey v1.7.2/go.mod h1:Vw0tHAZW6lzCRk3xgdin6fKYcG+G3Pg9vgXWeJpQFMM=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
@@ -450,6 +467,7 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
@@ -692,6 +710,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+moul.io/http2curl v1.0.0 h1:6XwpyZOYsgZJrU8exnG87ncVkU1FVCcTRpwzOkTDUi8=
+moul.io/http2curl v1.0.0/go.mod h1:f6cULg+e4Md/oW1cYmwW4IWQOVl2lGbmCNGOHvzX2kE=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

main.go

@@ -9,6 +9,7 @@ import (
 	"github.com/mercari/tfnotify/notifier"
 	"github.com/mercari/tfnotify/notifier/github"
 	"github.com/mercari/tfnotify/notifier/gitlab"
+	"github.com/mercari/tfnotify/notifier/mattermost"
 	"github.com/mercari/tfnotify/notifier/slack"
 	"github.com/mercari/tfnotify/notifier/typetalk"
 	"github.com/mercari/tfnotify/terraform"
@@ -151,6 +152,21 @@ func (t *tfnotify) Run() error {
 			return err
 		}
 		notifier = client.Notify
+	case "mattermost":
+		client, err := mattermost.NewClient(mattermost.Config{
+			Webhook:  t.config.Notifier.Mattermost.Webhook,
+			Channel:  t.config.Notifier.Mattermost.Channel,
+			Botname:  t.config.Notifier.Mattermost.Bot,
+			Title:    t.context.String("title"),
+			Message:  t.context.String("message"),
+			CI:       ci.URL,
+			Parser:   t.parser,
+			Template: t.template,
+		})
+		if err != nil {
+			return err
+		}
+		notifier = client.Notify
 	case "slack":
 		client, err := slack.NewClient(slack.Config{
 			Token:        t.config.Notifier.Slack.Token,