golang.org/x/tools v0.1.1: 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@v0.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/tools@v0.1.1
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:c78005e5798696d39f904f96966868e1c2b303c4edca396837381a41f0eed9ea","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@v0.1.1","kind":"HOW","packages":["pkg:golang/golang.org/x/tools@v0.1.1"],"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@v0.1.1"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/tools@v0.1.1","symbols":["golang.org/x/tools/imports.VendorlessPath"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.20

require golang.org/x/tools v0.1.1

require (
	golang.org/x/mod v0.4.2 // indirect
	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
)

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/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
golang.org/x/mod v0.4.2/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/sync v0.0.0-20190423024810-112230192c58/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 v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 v0.1.1 h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=
golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
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 v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

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@v0.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/tools@v0.1.1"
  ],
  "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.")
}