golang.org/x/tools v0.31.0: imports.Process

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify golang.org/x/tools/imports.Process in pkg:golang/golang.org/x/tools@v0.31.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/tools@v0.31.0
Demonstrate these symbols/APIs:
  - golang.org/x/tools/imports.Process
Required runtime conditions:
  - ecosystem: golang
  - language: go
  - packageManager: go@1.26.6
  - runtime: go@1.26.6

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:dfd5171df8c3234596c4bcbac8c4d11b78a7b9e7ed151e4900875c1d3a8d4d6f","contract":["Process formats Go source code and automatically adds missing imports","Process removes unused imports from Go source code","Process accepts Options to preserve comments and format source","Process returns an error when given invalid Go syntax"],"goal":"verify golang.org/x/tools/imports.Process in pkg:golang/golang.org/x/tools@v0.31.0","kind":"HOW","packages":["pkg:golang/golang.org/x/tools@v0.31.0"],"schemaVersion":1,"symbols":["golang.org/x/tools/imports.Process"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/golang.org/x/tools@v0.31.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/tools@v0.31.0","symbols":["golang.org/x/tools/imports.Process"],"verifierAdapter":"golang@1"}

module example.com/importsdemo

go 1.24.0

require golang.org/x/tools v0.31.0

require (
	golang.org/x/mod v0.24.0 // indirect
	golang.org/x/sync v0.12.0 // indirect
)

github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
golang.org/x/mod v0.24.0 h1:ZfthKaKaT4NrhGVZHO1/WDTwGES4De8KtWO0SIbNJMU=
golang.org/x/mod v0.24.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
golang.org/x/sync v0.12.0 h1:MHc5BpPuC30uJk597Ri8TV3CNZcTLu6B6z4lJy+g6Jw=
golang.org/x/sync v0.12.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
golang.org/x/tools v0.31.0 h1:0EedkvKDbh+qistFTd0Bcwe/YLh4vHwWEkiI0toFIBU=
golang.org/x/tools v0.31.0/go.mod h1:naFTU+Cev749tSJRXJlna0T3WxKvb1kWEx15xA4SdmQ=

package importsdemo

import (
	"golang.org/x/tools/imports"
)

// ProcessSource formats and resolves imports for Go source code.
func ProcessSource(filename string, src []byte, opt *imports.Options) ([]byte, error) {
	return imports.Process(filename, src, opt)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/tools/imports.Process in pkg:golang/golang.org/x/tools@v0.31.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/tools@v0.31.0"
  ],
  "symbols": [
    "golang.org/x/tools/imports.Process"
  ],
  "runtimeConditions": {
    "ecosystem": "golang",
    "language": "go",
    "packageManager": "go@1.26.6",
    "runtime": "go@1.26.6"
  }
}

package main

import (
	"fmt"
	"os"
	"strings"

	"example.com/importsdemo"
	"golang.org/x/tools/imports"
)

func main() {
	// 1. Missing imports
	unformatted := []byte("package main\n\nfunc main() {\n\tfmt.Println(\"hello\")\n}\n")
	res, err := importsdemo.ProcessSource("main.go", unformatted, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Assertion 1 failed: %v\n", err)
		os.Exit(1)
	}
	if !strings.Contains(string(res), `"fmt"`) {
		fmt.Fprintf(os.Stderr, "Assertion 1 failed: missing 'fmt' import\n")
		os.Exit(1)
	}

	// 2. Unused imports
	withUnused := []byte("package main\n\nimport (\n\t\"fmt\"\n\t\"os\"\n)\n\nfunc main() {\n\tfmt.Println(\"test\")\n}\n")
	res, err = importsdemo.ProcessSource("main.go", withUnused, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Assertion 2 failed: %v\n", err)
		os.Exit(1)
	}
	if strings.Contains(string(res), `"os"`) || !strings.Contains(string(res), `"fmt"`) {
		fmt.Fprintf(os.Stderr, "Assertion 2 failed: unused import not removed\n")
		os.Exit(1)
	}

	// 3. Options
	input := []byte("package main\n\n// Important comment\nfunc main() {\n\tstrings.ToUpper(\"abc\")\n}\n")
	opt := &imports.Options{
		Comments:  true,
		TabIndent: true,
		TabWidth:  8,
	}
	res, err = importsdemo.ProcessSource("main.go", input, opt)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Assertion 3 failed: %v\n", err)
		os.Exit(1)
	}
	if !strings.Contains(string(res), "// Important comment") || !strings.Contains(string(res), `"strings"`) {
		fmt.Fprintf(os.Stderr, "Assertion 3 failed: options formatting error\n")
		os.Exit(1)
	}

	// 4. Syntax error
	invalid := []byte("package main\n\nfunc main( {\n")
	_, err = importsdemo.ProcessSource("main.go", invalid, nil)
	if err == nil {
		fmt.Fprintf(os.Stderr, "Assertion 4 failed: expected syntax error\n")
		os.Exit(1)
	}

	fmt.Println("All contract assertions passed")
}