all: enable linters and tests on github actions

.github/release-drafter.yml

@@ -0,0 +1,22 @@
+# See: https://github.com/marketplace/actions/release-drafter
+
+name-template: "v$NEXT_PATCH_VERSION"
+tag-template: "v$NEXT_PATCH_VERSION"
+categories:
+  - title: "Features"
+    labels:
+      - "feature"
+  - title: "Bug Fixes"
+    labels:
+      - "fix"
+      - "bugfix"
+      - "bug"
+  - title: "Maintenance"
+    labels:
+      - "task"
+      - "documentation"
+change-template: "- $TITLE @$AUTHOR (#$NUMBER)"
+template: |
+  ## Changes
+
+  $CHANGES

.github/workflows/go.yml

@@ -0,0 +1,27 @@
+# This file adheres to the YAML5 style.
+{
+  name: "Go",
+  on: ["push", "pull_request"],
+  jobs: {
+    build: {
+      name: "Build",
+      "runs-on": "ubuntu-latest",
+      steps: [
+        {
+          name: "Set up Go 1.16",
+          uses: "actions/setup-go@v1",
+          "with": {"go-version": 1.16},
+          id: "go",
+        },
+        {name: "Check out code into the Go module directory", uses: "actions/checkout@v1"},
+        {name: "Linter", run: "make ci-lint"},
+        {name: "Test", run: "make test"},
+        {
+          name: "Upload coverage",
+          uses: "codecov/codecov-action@v2",
+          "with": {token: "${{secrets.CODECOV_TOKEN}}", file: "./coverage.txt", fail_ci_if_error: false},
+        },
+      ],
+    },
+  },
+}

.github/workflows/release-management.yml

@@ -0,0 +1,16 @@
+name: Release Management
+
+on:
+  push:
+    # branches to consider in the event; optional, defaults to all
+    branches:
+      - master
+
+jobs:
+  update_draft_release:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: toolmantim/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -0,0 +1,4 @@
+.idea
+.vscode
+coverage.txt
+bin

.golangci.yml

@@ -0,0 +1,49 @@
+{
+  "run": {
+    # timeout for analysis, e.g. 30s, 5m, default is 1m
+    "deadline": "3m",
+  },
+  "fast": false,
+  "linters": {
+    "enable": [
+      "deadcode",
+      "errcheck",
+      "gas",
+      "gocritic",
+      "gofmt",
+      "goimports",
+      "revive",
+      "govet",
+      "gosimple",
+      "ineffassign",
+      "megacheck",
+      "misspell",
+      "nakedret",
+      "staticcheck",
+      "structcheck",
+      "typecheck",
+      "unconvert",
+      "unused",
+      "varcheck",
+    ],
+  },
+  "disable": [
+    "depguard",
+    "dupl",
+    "gocyclo",
+    "interfacer",
+    "lll",
+    "maligned",
+    "prealloc",
+  ],
+  "linters-settings": {
+    "gocritic": {
+      "enabled-tags": [
+        "style",
+        "diagnostic",
+        "performance",
+        "experimental",
+      ],
+    },
+  },
+}

Makefile

@@ -0,0 +1,19 @@
+GOPATH_DIR=`go env GOPATH`
+
+test:
+	go test -count 2 -coverpkg=./... -coverprofile=coverage.txt -covermode=atomic ./...
+	go test -bench=. ./...
+	@echo "everything is OK"
+
+ci-lint:
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH_DIR)/bin v1.43.0
+	$(GOPATH_DIR)/bin/golangci-lint run ./...
+	go install github.com/quasilyte/go-consistent@latest
+	$(GOPATH_DIR)/bin/go-consistent ./...
+	@echo "everything is OK"
+
+lint:
+	golangci-lint run ./...
+	@echo "everything is OK"
+
+.PHONY: ci-lint lint test

README.md

@@ -1,7 +1,12 @@
-# gogrep
-
 ![logo](https://github.com/quasilyte/vscode-gogrep/blob/master/docs/logo.png?raw=true)
 
+![Build Status](https://github.com/quasilyte/perf-heatmap/workflows/Go/badge.svg)
+[![PkgGoDev](https://pkg.go.dev/badge/mod/github.com/quasilyte/perf-heatmap/heatmap)](https://pkg.go.dev/github.com/quasilyte/perf-heatmap/heatmap)
+[![Go Report Card](https://goreportcard.com/badge/github.com/quasilyte/go-ruleguard)](https://goreportcard.com/report/github.com/quasilyte/go-ruleguard)
+![Code Coverage](https://codecov.io/gh/quasilyte/perf-heatmap/branch/master/graph/badge.svg)
+
+# gogrep
+
 WIP: this is an attempt to move modified [gogrep](https://github.com/mvdan/gogrep) from the [go-ruleguard](https://github.com/quasilyte/go-ruleguard) project, so it can be used outside of the ruleguard as a library.
 
 ## Acknowledgements

cmd/gogrep/main.go

@@ -7,7 +7,6 @@ import (
 	"go/token"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"log"
 	"math"
 	"os"
@@ -473,7 +472,7 @@ func (p *program) walkTarget(target string, filenameQueue chan<- string, ticker
 		}
 
 		numMatches := atomic.LoadUint64(&p.numMatches)
-		if numMatches > uint64(p.args.limit) {
+		if numMatches > p.args.limit {
 			return io.EOF
 		}
 
@@ -548,7 +547,7 @@ func (p *program) printMatches() error {
 func (p *program) finishProfiling() error {
 	if p.args.cpuProfile != "" {
 		pprof.StopCPUProfile()
-		err := ioutil.WriteFile(p.args.cpuProfile, p.cpuProfile.Bytes(), 0666)
+		err := os.WriteFile(p.args.cpuProfile, p.cpuProfile.Bytes(), 0o600)
 		if err != nil {
 			return fmt.Errorf("write CPU profile: %v", err)
 		}

cmd/gogrep/worker.go

@@ -5,7 +5,7 @@ import (
 	"go/ast"
 	"go/parser"
 	"go/token"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/quasilyte/gogrep"
@@ -39,7 +39,7 @@ type worker struct {
 }
 
 func (w *worker) grepFile(filename string) (int, error) {
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return 0, fmt.Errorf("read file: %v", err)
 	}

codecov.yml

@@ -0,0 +1 @@
+comment: false

compile.go

@@ -156,11 +156,12 @@ func (c *compiler) compileOptFieldList(n *ast.FieldList) {
 			// `func (...) $*result` - result could be anything
 			// `func (...) $result`  - result is a field list of 1 element
 			info := decodeWildName(ident.Name)
-			if info.Seq {
+			switch {
+			case info.Seq:
 				c.compileWildIdent(ident, true)
-			} else if info.Name == "_" {
+			case info.Name == "_":
 				c.emitInstOp(opFieldNode)
-			} else {
+			default:
 				c.emitInst(instruction{
 					op:         opNamedFieldNode,
 					valueIndex: c.internVar(n, info.Name),

filters/filters.go

@@ -20,7 +20,7 @@ type Info struct {
 	OpTab *OperationsTable
 }
 
-func (info Info) String() string {
+func (info *Info) String() string {
 	var parts []string
 	for _, f := range info.FilePredicates {
 		negate := ""

filters/parse.go

@@ -42,8 +42,8 @@ func (p *filterParser) Parse(s string) (*Expr, Info, error) {
 		return nil, Info{}, err
 	}
 
-	p.varnameToID = map[string]int32{}
-	p.functionFilterSet = map[SpecialPredicate]struct{}{}
+	p.varnameToID = make(map[string]int32)
+	p.functionFilterSet = make(map[SpecialPredicate]struct{})
 
 	p.info.OpTab = p.tab
 
@@ -195,26 +195,6 @@ func (p *filterParser) convertBinaryExpr(root *ast.BinaryExpr) (*Expr, error) {
 	return p.convertBinaryExprXY(root.Op, root.X, root.Y)
 }
 
-func (p *filterParser) invertOp(op token.Token) token.Token {
-	switch op {
-	case token.EQL:
-		return token.NEQ
-	case token.NEQ:
-		return token.EQL
-	case token.LSS:
-		return token.GEQ
-	case token.GTR:
-		return token.LEQ
-	case token.LEQ:
-		return token.GTR
-	case token.GEQ:
-		return token.LSS
-
-	default:
-		return token.ILLEGAL
-	}
-}
-
 func (p *filterParser) convertBinaryExprXY(op token.Token, x, y ast.Expr) (*Expr, error) {
 	switch op {
 	case token.LOR:

filters/parse_test.go

@@ -131,7 +131,8 @@ func TestParse(t *testing.T) {
 				t.Fatalf("compile %q: %v", test.input, err)
 			}
 			if test.info != info.String() {
-				t.Fatalf("info mismatch for %q:\nhave: %s\nwant: %s", test.input, info, test.info)
+				t.Fatalf("info mismatch for %q:\nhave: %s\nwant: %s",
+					test.input, info.String(), test.info)
 			}
 			have := Sprint(&info, compiled)
 			if test.expr != have {

gogrep.go

@@ -109,6 +109,6 @@ func Compile(config CompileConfig) (*Pattern, PatternInfo, error) {
 
 func newPatternInfo() PatternInfo {
 	return PatternInfo{
-		Vars: map[string]struct{}{},
+		Vars: make(map[string]struct{}),
 	}
 }

match.go

@@ -61,8 +61,7 @@ func (m *matcher) MatchNode(state *MatcherState, n ast.Node, accept func(MatchDa
 			m.walkExprSlice(state, n.Results, accept)
 		}
 	case opMultiDecl:
-		switch n := n.(type) {
-		case *ast.File:
+		if n, ok := n.(*ast.File); ok {
 			m.walkDeclSlice(state, n.Decls, accept)
 		}
 	default:
@@ -609,7 +608,7 @@ func (m *matcher) matchSpecSlice(state *MatcherState, specs []ast.Spec) bool {
 
 // matchNodeList matches two lists of nodes. It uses a common algorithm to match
 // wildcard patterns with any number of nodes without recursion.
-func (m *matcher) matchNodeList(state *MatcherState, nodes NodeSlice, partial bool) (ast.Node, int) {
+func (m *matcher) matchNodeList(state *MatcherState, nodes NodeSlice, partial bool) (matched ast.Node, offset int) {
 	sliceLen := nodes.Len()
 	inst := m.nextInst(state)
 	if inst.op == opEnd {
@@ -656,7 +655,7 @@ func (m *matcher) matchNodeList(state *MatcherState, nodes NodeSlice, partial bo
 		stack = stack[:len(stack)-1]
 		pcNext = 0
 		jNext = 0
-		if len(stack) > 0 {
+		if len(stack) != 0 {
 			pcNext = stack[len(stack)-1].pc
 			jNext = stack[len(stack)-1].j
 		}

match_test.go

@@ -513,8 +513,8 @@ func TestMatch(t *testing.T) {
 		{`switch $*x {}`, 1, `switch {}`},
 		{`switch $*_; b {}`, 1, `switch b := f(); b {}`},
 		{`switch $*_; b {}`, 0, `switch b := f(); c {}`},
-		//{`switch $*x {}`, 1, `switch a(); b {}`},
-		//{`switch $*x {}; switch $*x {}`, 1, `{ switch a(); b {}; switch a(); b {} }`},
+		// TODO {`switch $*x {}`, 1, `switch a(); b {}`},
+		// TODO {`switch $*x {}; switch $*x {}`, 1, `{ switch a(); b {}; switch a(); b {} }`},
 		{`switch $*x {}; switch $*x {}`, 0, `{ switch a(); b {}; switch b {} }`},
 		{`switch a(); $*_ {}`, 0, `for b {}`},
 

nodetag/nodetag.go

@@ -1,6 +1,8 @@
 package nodetag
 
-import "go/ast"
+import (
+	"go/ast"
+)
 
 type Value int
 

parse.go

@@ -296,8 +296,9 @@ func tokenize(src []byte) ([]fullToken, error) {
 		}
 		toks = append(toks, wt)
 		if caseStat == caseHere {
-			toks = append(toks, fullToken{wt.pos, token.COLON, ""})
-			toks = append(toks, fullToken{wt.pos, token.IDENT, "gogrep_body"})
+			toks = append(toks,
+				fullToken{wt.pos, token.COLON, ""},
+				fullToken{wt.pos, token.IDENT, "gogrep_body"})
 		}
 	}
 	return toks, err
@@ -341,7 +342,7 @@ func encodeWildName(name string, any bool) string {
 func decodeWildName(s string) varInfo {
 	s = s[len(wildSeparator):]
 	nameEnd := strings.Index(s, wildSeparator)
-	name := s[:nameEnd]
+	name := s[:nameEnd+0]
 	s = s[nameEnd:]
 	s = s[len(wildSeparator):]
 	kind := s