feat: go1.19 support (#3037)

.github/workflows/post-release.yml

@@ -14,8 +14,10 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
-          go-version: 1.18
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
+          go-version: 1.19
 
       - name: Update GitHub action config
         run: make assets/github-action-config.json

.github/workflows/pr-extra.yml

@@ -13,8 +13,10 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
-          go-version: 1.18
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
+          go-version: 1.19
       - name: Run go list
         run: go list -json -m all > go.list
       - name: Nancy

.github/workflows/pr.yml

@@ -6,7 +6,7 @@ on:
   pull_request:
 
 env:
-  GO_VERSION: 1.18
+  GO_VERSION: 1.19
 
 jobs:
   # Check if there any dirty change for go mod tidy
@@ -16,7 +16,9 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
           go-version: ${{ env.GO_VERSION }}
       - name: Checkout code
         uses: actions/checkout@v3
@@ -34,8 +36,11 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false'  # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
-          go-version: ${{ env.GO_VERSION }}
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
+#          go-version: ${{ env.GO_VERSION }} # todo(ldez) uncomment after the next release v1.48.0
+          go-version: 1.18
       - name: lint
         uses: golangci/golangci-lint-action@v3.2.0
         with:
@@ -52,7 +57,9 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
           go-version: ${{ env.GO_VERSION }} # test only the latest go version to speed up CI
       - name: Run tests
         run: make.exe test
@@ -66,7 +73,9 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
           go-version: ${{ env.GO_VERSION }} # test only the latest go version to speed up CI
       - name: Run tests
         run: make test
@@ -77,14 +86,16 @@ jobs:
     strategy:
       matrix:
         golang:
-          - 1.17
           - 1.18
+          - 1.19
     steps:
       - uses: actions/checkout@v3
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
           go-version: ${{ matrix.golang }}
       - uses: actions/cache@v3
         with:
@@ -108,7 +119,9 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
           go-version: ${{ env.GO_VERSION }}
       - name: Check generated files are up to date
         run: make fast_check_generated

.github/workflows/tag.yml

@@ -14,8 +14,10 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
-          go-version: 1.18
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
+          go-version: 1.19
       - name: Unshallow
         run: git fetch --prune --unshallow
 
@@ -41,8 +43,10 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          # stable: 'false' # Keep this line to be able to use rc and beta version of Go (ex: 1.18.0-rc1).
-          go-version: 1.18
+          # Keep the following comment to be able to use rc and beta version of Go (ex: 1.18.0-rc.1).
+          # https://github.com/actions/setup-go#supported-version-syntax
+          # stable: 'false'
+          go-version: 1.19
 
       - name: Unshallow
         run: git fetch --prune --unshallow

.golangci.reference.yml

@@ -68,9 +68,9 @@ run:
   allow-parallel-runners: false
 
   # Define the Go version limit.
-  # Mainly related to generics support in go1.18.
-  # Default: use Go version from the go.mod file, fallback on the env var `GOVERSION`, fallback on 1.17
-  go: '1.18'
+  # Mainly related to generics support since go1.18.
+  # Default: use Go version from the go.mod file, fallback on the env var `GOVERSION`, fallback on 1.18
+  go: '1.19'
 
 
 # output configuration options

build/Dockerfile

@@ -1,5 +1,5 @@
 # stage 1 building the code
-FROM golang:1.18 as builder
+FROM golang:1.19 as builder
 
 ARG VERSION
 ARG SHORT_COMMIT
@@ -10,7 +10,7 @@ WORKDIR /golangci
 RUN CGO_ENABLED=0 go build -trimpath -ldflags "-s -w -X main.version=$VERSION -X main.commit=$SHORT_COMMIT -X main.date=$DATE" -o golangci-lint ./cmd/golangci-lint/main.go
 
 # stage 2
-FROM golang:1.18
+FROM golang:1.19
 # don't place it into $GOPATH/bin because Drone mounts $GOPATH as volume
 COPY --from=builder /golangci/golangci-lint /usr/bin/
 CMD ["golangci-lint"]

build/Dockerfile.alpine

@@ -1,5 +1,5 @@
 # stage 1 building the code
-FROM golang:1.18-alpine as builder
+FROM golang:1.19-alpine as builder
 
 ARG VERSION
 ARG SHORT_COMMIT
@@ -15,7 +15,7 @@ RUN apk --no-cache add gcc musl-dev git mercurial
 RUN CGO_ENABLED=0 go build -trimpath -ldflags "-s -w -X main.version=$VERSION -X main.commit=$SHORT_COMMIT -X main.date=$DATE" -o golangci-lint ./cmd/golangci-lint/main.go
 
 # stage 2
-FROM golang:1.18-alpine
+FROM golang:1.19-alpine
 # gcc is required to support cgo;
 # git and mercurial are needed most times for go get`, etc.
 # See https://github.com/docker-library/golang/issues/80

go.mod

@@ -1,6 +1,6 @@
 module github.com/golangci/golangci-lint
 
-go 1.18
+go 1.19
 
 require (
 	4d63.com/gochecknoglobals v0.1.0

pkg/golinters/goanalysis/runner_loadingpackage.go

@@ -121,7 +121,15 @@ func (lp *loadingPackage) loadFromSource(loadMode LoadMode) error {
 
 	pkg.IllTyped = true
 
-	pkg.TypesInfo = newTypesInfo()
+	pkg.TypesInfo = &types.Info{
+		Types:      make(map[ast.Expr]types.TypeAndValue),
+		Instances:  make(map[*ast.Ident]types.Instance),
+		Defs:       make(map[*ast.Ident]types.Object),
+		Uses:       make(map[*ast.Ident]types.Object),
+		Implicits:  make(map[ast.Node]types.Object),
+		Scopes:     make(map[ast.Node]*types.Scope),
+		Selections: make(map[*ast.SelectorExpr]*types.Selection),
+	}
 
 	importer := func(path string) (*types.Package, error) {
 		if path == unsafePkgName {

pkg/golinters/goanalysis/runner_loadingpackage_ti.go

@@ -1,21 +0,0 @@
-//go:build go1.18
-// +build go1.18
-
-package goanalysis
-
-import (
-	"go/ast"
-	"go/types"
-)
-
-func newTypesInfo() *types.Info {
-	return &types.Info{
-		Types:      make(map[ast.Expr]types.TypeAndValue),
-		Instances:  make(map[*ast.Ident]types.Instance),
-		Defs:       make(map[*ast.Ident]types.Object),
-		Uses:       make(map[*ast.Ident]types.Object),
-		Implicits:  make(map[ast.Node]types.Object),
-		Scopes:     make(map[ast.Node]*types.Scope),
-		Selections: make(map[*ast.SelectorExpr]*types.Selection),
-	}
-}

pkg/golinters/goanalysis/runner_loadingpackage_ti_go117.go

@@ -1,20 +0,0 @@
-//go:build go1.17 && !go1.18
-// +build go1.17,!go1.18
-
-package goanalysis
-
-import (
-	"go/ast"
-	"go/types"
-)
-
-func newTypesInfo() *types.Info {
-	return &types.Info{
-		Types:      make(map[ast.Expr]types.TypeAndValue),
-		Defs:       make(map[*ast.Ident]types.Object),
-		Uses:       make(map[*ast.Ident]types.Object),
-		Implicits:  make(map[ast.Node]types.Object),
-		Scopes:     make(map[ast.Node]*types.Scope),
-		Selections: make(map[*ast.SelectorExpr]*types.Selection),
-	}
-}

pkg/golinters/staticcheck_common.go

@@ -98,6 +98,7 @@ func staticCheckConfig(settings *config.StaticCheckSettings) *scconfig.Config {
 }
 
 // https://github.com/dominikh/go-tools/blob/9bf17c0388a65710524ba04c2d821469e639fdc2/lintcmd/lint.go#L437-L477
+//
 //nolint:gocritic // Keep the original source code.
 func filterAnalyzerNames(analyzers []string, checks []string) map[string]bool {
 	allowedChecks := map[string]bool{}

pkg/lint/linter/linter.go

@@ -21,8 +21,8 @@ type Noop struct {
 }
 
 func (n Noop) Run(_ context.Context, lintCtx *Context) ([]result.Issue, error) {
-	lintCtx.Log.Warnf("%s is disabled because of go1.18."+
-		" You can track the evolution of the go1.18 support by following the https://github.com/golangci/golangci-lint/issues/2649.", n.name)
+	lintCtx.Log.Warnf("%s is disabled because of generics."+
+		" You can track the evolution of the generics support by following the https://github.com/golangci/golangci-lint/issues/2649.", n.name)
 	return nil, nil
 }
 

test/linters_test.go

@@ -312,15 +312,10 @@ func extractRunContextFromComments(t *testing.T, sourcePath string) *runContext
 			require.Failf(t, "invalid prefix of comment line %s", line)
 		}
 
-		// TODO(ldez) replace that by strings.Cut when we will drop go1.17
-		var before string
-		var after string
-		if i := strings.Index(line, " "); i >= 0 {
-			before = line[:i]
-			after = strings.TrimSpace(line[i+len(" "):])
-		} else {
-			require.Failf(t, "invalid prefix of comment line %s", line)
-		}
+		before, after, found := strings.Cut(line, " ")
+		require.Truef(t, found, "invalid prefix of comment line %s", line)
+
+		after = strings.TrimSpace(after)
 
 		switch before {
 		case "//golangcitest:args":