Initial implementation (#1)

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    commit-message:
+      prefix: "deps:"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "09:00"
+  - package-ecosystem: "github-actions"
+    commit-message:
+      prefix: "ci:"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "09:00"

.github/workflows/build.yml

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+name: build
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+  - cron: '0 10 * * 1' # run "At 10:00 on Monday"
+
+jobs:
+  run:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: true
+      matrix:
+        go: ['stable', 'oldstable']
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go }}
+          check-latest: true
+
+      - name: Go Format
+        run: gofmt -s -w . && git diff --exit-code
+
+      - name: Go Vet
+        run: go vet ./...
+
+      - name: Go Tidy
+        run: go mod tidy && git diff --exit-code
+
+      - name: Go Mod
+        run: go mod download
+
+      - name: Go Mod Verify
+        run: go mod verify
+
+      - name: Go Build
+        run: go build -o /dev/null ./...
+
+      - name: Go Test
+        run: go test -v -count=1 -race -shuffle=on -coverprofile=coverage.txt ./...

go.mod

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+module github.com/go-toolsmith/astdump
+
+go 1.19

main.go

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+package main
+
+import (
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"os"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		panic("needs 1 argument: file to process")
+	}
+
+	filename := os.Args[1]
+
+	file, err := os.Open(filename)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, filename, file, parser.Mode(0))
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	ast.Print(fset, f)
+}