Update build

* Update Go to 1.18
* Update circleci machine image.
* Switch maildev to new upstream image location.
* Update Go modules to 1.17 format.
* Make dependabot monthly to match prometheus/prometheus.

Signed-off-by: SuperQ <[email protected]>

.circleci/config.yml

@@ -9,7 +9,7 @@ jobs:
     # containers with mounted volumes which isn't supported with the docker
     # executor (even with setup_remote_docker).
     machine:
-      image: ubuntu-2004:202201-02
+      image: ubuntu-2204:current
     steps:
       - checkout
       - run: sudo service docker restart
@@ -18,7 +18,7 @@ jobs:
           command: sudo rm -rf /usr/local/go
       # Whenever the Go version is updated here, .promu.yml should also be updated.
       - go/install:
-          version: "1.17"
+          version: "1.18"
       - run:
           name: Remove generated code
           command: make clean
@@ -47,15 +47,15 @@ jobs:
   test:
     docker:
       # Whenever the Go version is updated here, .promu.yml should also be updated.
-      - image: quay.io/prometheus/golang-builder:1.17-base
+      - image: quay.io/prometheus/golang-builder:1.18-base
       # maildev containers are for running the email tests against a "real" SMTP server.
       # See notify/email_test.go for details.
-      - image: djfarrelly/maildev:1.1.0
+      - image: maildev/maildev:1.1.0
         name: maildev-noauth
         entrypoint: bin/maildev
         command:
           - -v
-      - image: djfarrelly/maildev:1.1.0
+      - image: maildev/maildev:1.1.0
         name: maildev-auth
         entrypoint: bin/maildev
         command:
@@ -104,13 +104,13 @@ jobs:
   mixin:
     docker:
       # Whenever the Go version is updated here, .promu.yml should also be updated.
-      - image: quay.io/prometheus/golang-builder:1.17-base
+      - image: quay.io/prometheus/golang-builder:1.18-base
     steps:
       - checkout
-      - run: cd doc/alertmanager-mixin; go install github.com/monitoring-mixins/mixtool/cmd/mixtool@latest
-      - run: cd doc/alertmanager-mixin; go install github.com/google/go-jsonnet/cmd/jsonnetfmt@latest
-      - run: cd doc/alertmanager-mixin; go install github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@latest
-      - run: cd doc/alertmanager-mixin; make lint
+      - run: go install github.com/monitoring-mixins/mixtool/cmd/mixtool@latest
+      - run: go install github.com/google/go-jsonnet/cmd/jsonnetfmt@latest
+      - run: go install github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@latest
+      - run: make -C doc/alertmanager-mixin lint
 workflows:
   version: 2
   alertmanager:

.github/dependabot.yml

@@ -3,8 +3,8 @@ updates:
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
   - package-ecosystem: "docker"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"

.promu.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .travis.yml and
     # .circle/config.yml should also be updated.
-    version: 1.17
+    version: 1.18
 repository:
     path: github.com/prometheus/alertmanager
 build:

config/notifiers.go

@@ -22,6 +22,8 @@ import (
 	"github.com/pkg/errors"
 	commoncfg "github.com/prometheus/common/config"
 	"github.com/prometheus/common/sigv4"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 )
 
 var (
@@ -145,6 +147,8 @@ var (
 		Message:              `{{ template "telegram.default.message" . }}`,
 		ParseMode:            "HTML",
 	}
+
+	normalizeTitle = cases.Title(language.AmericanEnglish)
 )
 
 // NotifierConfig contains base options common across all notifier configurations.
@@ -189,7 +193,7 @@ func (c *EmailConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	// Header names are case-insensitive, check for collisions.
 	normalizedHeaders := map[string]string{}
 	for h, v := range c.Headers {
-		normalized := strings.Title(h)
+		normalized := normalizeTitle.String(h)
 		if _, ok := normalizedHeaders[normalized]; ok {
 			return fmt.Errorf("duplicate header %q in email config", normalized)
 		}

go.mod

@@ -1,5 +1,7 @@
 module github.com/prometheus/alertmanager
 
+go 1.17
+
 require (
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137
 	github.com/aws/aws-sdk-go v1.43.11
@@ -37,10 +39,50 @@ require (
 	go.uber.org/atomic v1.9.0
 	golang.org/x/mod v0.5.1
 	golang.org/x/net v0.0.0-20220225172249-27dd8689420f
+	golang.org/x/text v0.3.7
 	golang.org/x/tools v0.1.9
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/telebot.v3 v3.0.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-go 1.16
+require (
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da // indirect
+	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
+	github.com/go-logfmt/logfmt v0.5.1 // indirect
+	github.com/go-openapi/analysis v0.21.2 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.20.0 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/btree v1.0.0 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/go-immutable-radix v1.0.0 // indirect
+	github.com/hashicorp/go-msgpack v0.5.3 // indirect
+	github.com/hashicorp/go-multierror v1.0.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/julienschmidt/httprouter v1.3.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/miekg/dns v1.1.26 // indirect
+	github.com/mitchellh/mapstructure v1.4.3 // indirect
+	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 // indirect
+	go.mongodb.org/mongo-driver v1.8.3 // indirect
+	golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect
+	golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c // indirect
+	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)

template/template.go

@@ -27,6 +27,8 @@ import (
 	"time"
 
 	"github.com/prometheus/common/model"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 
 	"github.com/prometheus/alertmanager/asset"
 	"github.com/prometheus/alertmanager/types"
@@ -132,7 +134,7 @@ type FuncMap map[string]interface{}
 var DefaultFuncs = FuncMap{
 	"toUpper": strings.ToUpper,
 	"toLower": strings.ToLower,
-	"title":   strings.Title,
+	"title":   cases.Title(language.AmericanEnglish).String,
 	// join is equal to strings.Join but inverts the argument order
 	// for easier pipelining in templates.
 	"join": func(sep string, s []string) string {