golang.org/x/tools v0.6.0: imports.VendorlessPath

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.VendorlessPath in pkg:golang/golang.org/x/tools@v0.6.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/tools@v0.6.0
Demonstrate these symbols/APIs:
  - golang.org/x/tools/imports.VendorlessPath

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:sha256:4862be7308a1fc5c02aea7824897f3faab616944d728212058419e3ae8b4909b","contract":["imports.VendorlessPath removes internal /vendor/ prefix from import paths","imports.VendorlessPath removes leading vendor/ prefix from import paths","imports.VendorlessPath removes path up to the last /vendor/ segment when multiple vendor directories appear","imports.VendorlessPath returns original path unchanged when no vendor directory appears","imports.VendorlessPath returns empty string unchanged"],"goal":"verify golang.org/x/tools/imports.VendorlessPath in pkg:golang/golang.org/x/tools@v0.6.0","kind":"HOW","packages":["pkg:golang/golang.org/x/tools@v0.6.0"],"schemaVersion":1,"symbols":["golang.org/x/tools/imports.VendorlessPath"]},"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@v0.6.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/tools@v0.6.0","symbols":["golang.org/x/tools/imports.VendorlessPath"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.20

require golang.org/x/tools v0.6.0

require (
	golang.org/x/mod v0.8.0 // indirect
	golang.org/x/sys v0.5.0 // indirect
)

golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=

package main

import (
	"fmt"

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

func main() {
	path1 := "example.com/org/repo/vendor/example.com/dep/pkg"
	devendorized1 := imports.VendorlessPath(path1)
	fmt.Printf("%s -> %s\n", path1, devendorized1)

	path2 := "vendor/example.com/dep/pkg"
	devendorized2 := imports.VendorlessPath(path2)
	fmt.Printf("%s -> %s\n", path2, devendorized2)

	path3 := "example.com/dep/pkg"
	devendorized3 := imports.VendorlessPath(path3)
	fmt.Printf("%s -> %s\n", path3, devendorized3)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/tools/imports.VendorlessPath in pkg:golang/golang.org/x/tools@v0.6.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/tools@v0.6.0"
  ],
  "symbols": [
    "golang.org/x/tools/imports.VendorlessPath"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	// Assertion 1: imports.VendorlessPath removes internal /vendor/ prefix from import paths
	{
		input := "example.com/org/repo/vendor/example.com/dep/pkg"
		expected := "example.com/dep/pkg"
		actual := imports.VendorlessPath(input)
		if actual != expected {
			fmt.Fprintf(os.Stderr, "assertion 1 failed: expected %q, got %q\n", expected, actual)
			os.Exit(1)
		}
	}

	// Assertion 2: imports.VendorlessPath removes leading vendor/ prefix from import paths
	{
		input := "vendor/example.com/dep/pkg"
		expected := "example.com/dep/pkg"
		actual := imports.VendorlessPath(input)
		if actual != expected {
			fmt.Fprintf(os.Stderr, "assertion 2 failed: expected %q, got %q\n", expected, actual)
			os.Exit(1)
		}
	}

	// Assertion 3: imports.VendorlessPath removes path up to the last /vendor/ segment when multiple vendor directories appear
	{
		input := "example.com/pkg/vendor/sub/vendor/example.com/target/pkg"
		expected := "example.com/target/pkg"
		actual := imports.VendorlessPath(input)
		if actual != expected {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: expected %q, got %q\n", expected, actual)
			os.Exit(1)
		}
	}

	// Assertion 4: imports.VendorlessPath returns original path unchanged when no vendor directory appears
	{
		input := "example.com/dep/pkg"
		expected := "example.com/dep/pkg"
		actual := imports.VendorlessPath(input)
		if actual != expected {
			fmt.Fprintf(os.Stderr, "assertion 4 failed: expected %q, got %q\n", expected, actual)
			os.Exit(1)
		}
	}

	// Assertion 5: imports.VendorlessPath returns empty string unchanged
	{
		input := ""
		expected := ""
		actual := imports.VendorlessPath(input)
		if actual != expected {
			fmt.Fprintf(os.Stderr, "assertion 5 failed: expected %q, got %q\n", expected, actual)
			os.Exit(1)
		}
	}

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