golang.org/x/tools v0.0.0-20200825202427-b303f430e36d

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 pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d

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:sha256:773092ae51d64a03f900ee1b97cddc470248e90c2eb363f02b9d44a57234e319","contract":["imports.Process formats Go source code and automatically adds missing standard library imports","imports.Process removes unused imports from Go source code","imports.Process with Options.FormatOnly formats Go source code without modifying imports","imports.VendorlessPath strips the vendor prefix from vendored package import paths"],"goal":"verify pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d","kind":"HOW","packages":["pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d"],"schemaVersion":1},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d","verifierAdapter":"golang@1"}

module sample

go 1.21

require golang.org/x/tools v0.0.0-20200825202427-b303f430e36d

require (
	golang.org/x/mod v0.3.0 // indirect
	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 // indirect
)

github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20200825202427-b303f430e36d h1:W07d4xkoAUSNOkOzdzXCdFGxT7o2rW4q8M34tB2i//k=
golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

package main

import (
	"fmt"

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

func main() {
	src := []byte("package main\n\nfunc main() {\nfmt.Println(\"hello\")\n}\n")
	opts := &imports.Options{
		TabWidth:  8,
		TabIndent: true,
		Comments:  true,
	}
	out, err := imports.Process("main.go", src, opts)
	if err != nil {
		panic(err)
	}
	fmt.Print(string(out))
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/tools@v0.0.0-20200825202427-b303f430e36d"
  ]
}

package main

import (
	"fmt"
	"os"
	"strings"

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

func main() {
	// 1. imports.Process formats Go source and adds missing standard library imports
	unformatted := []byte("package main\n\nfunc main() {\nfmt.Println(\"ok\")\n}\n")
	formatted, err := imports.Process("sample.go", unformatted, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "imports.Process failed: %v\n", err)
		os.Exit(1)
	}
	if !strings.Contains(string(formatted), "import \"fmt\"") {
		fmt.Fprintf(os.Stderr, "expected fmt import to be added, got:\n%s\n", string(formatted))
		os.Exit(1)
	}

	// 2. imports.Process removes unused imports
	withUnused := []byte("package main\n\nimport (\n\t\"fmt\"\n\t\"strings\"\n)\n\nfunc main() {\n\tfmt.Println(\"ok\")\n}\n")
	cleaned, err := imports.Process("sample.go", withUnused, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "imports.Process unused removal failed: %v\n", err)
		os.Exit(1)
	}
	if strings.Contains(string(cleaned), "\"strings\"") {
		fmt.Fprintf(os.Stderr, "expected unused strings import to be removed, got:\n%s\n", string(cleaned))
		os.Exit(1)
	}

	// 3. imports.Options with FormatOnly formats code without changing imports
	formatOnlyOpts := &imports.Options{
		FormatOnly: true,
		TabWidth:   8,
		TabIndent:  true,
		Comments:   true,
	}
	fmtOnlyOut, err := imports.Process("sample.go", unformatted, formatOnlyOpts)
	if err != nil {
		fmt.Fprintf(os.Stderr, "imports.Process FormatOnly failed: %v\n", err)
		os.Exit(1)
	}
	if strings.Contains(string(fmtOnlyOut), "import \"fmt\"") {
		fmt.Fprintf(os.Stderr, "expected FormatOnly not to add imports, got:\n%s\n", string(fmtOnlyOut))
		os.Exit(1)
	}

	// 4. imports.VendorlessPath strips vendor prefixes from import paths
	got := imports.VendorlessPath("example.com/mod/vendor/golang.org/x/tools/imports")
	if got != "golang.org/x/tools/imports" {
		fmt.Fprintf(os.Stderr, "unexpected VendorlessPath result: %q\n", got)
		os.Exit(1)
	}

	fmt.Println("contract ok")
}