github.com/hashicorp/go-version v1.2.0: NewVersion

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 github.com/hashicorp/go-version.NewVersion in pkg:golang/github.com/hashicorp/go-version@v1.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/hashicorp/go-version@v1.2.0
Demonstrate these symbols/APIs:
  - github.com/hashicorp/go-version.NewVersion

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:sha256:8592271a6f384a105963783bd9badddf6040381bfae4630f847e24f5f486f4cf","contract":["version.NewVersion(\"1.2.0-beta.1+build42\") parses semantic version strings into a *version.Version with Segments() [1, 2, 0] and Prerelease() \"beta.1\"","version.NewVersion(\"1.2.0-beta.1+build42\") orders before version.NewVersion(\"1.2.0\") via LessThan","version.NewVersion(\"2.0.1+meta9\") extracts build metadata \"meta9\" via Metadata()","version.NewVersion(\"not-a-valid-version\") returns a non-nil error and nil *version.Version for malformed version strings"],"goal":"verify github.com/hashicorp/go-version.NewVersion in pkg:golang/github.com/hashicorp/go-version@v1.2.0","kind":"HOW","packages":["pkg:golang/github.com/hashicorp/go-version@v1.2.0"],"schemaVersion":1,"symbols":["github.com/hashicorp/go-version.NewVersion"]},"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/github.com/hashicorp/go-version@v1.2.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/hashicorp/go-version@v1.2.0","symbols":["github.com/hashicorp/go-version.NewVersion"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.21

require github.com/hashicorp/go-version v1.2.0

github.com/hashicorp/go-version v1.2.0 h1:3vNe/fWF5CBgRIguda1meWhsZHy3m8gCJ5wx+dIzX/E=
github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=

package sample

import (
	version "github.com/hashicorp/go-version"
)

func ParseAndCompare(rawA, rawB string) (string, bool, []int, string, error) {
	vA, err := version.NewVersion(rawA)
	if err != nil {
		return "", false, nil, "", err
	}
	vB, err := version.NewVersion(rawB)
	if err != nil {
		return "", false, nil, "", err
	}
	return vA.String(), vA.LessThan(vB), vA.Segments(), vA.Prerelease(), nil
}

func IsInvalid(raw string) bool {
	v, err := version.NewVersion(raw)
	return err != nil && v == nil
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/hashicorp/go-version.NewVersion in pkg:golang/github.com/hashicorp/go-version@v1.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/hashicorp/go-version@v1.2.0"
  ],
  "symbols": [
    "github.com/hashicorp/go-version.NewVersion"
  ]
}

package main

import (
	"fmt"
	"os"

	version "github.com/hashicorp/go-version"
	"example.com/sample"
)

func main() {
	str, less, segs, pre, err := sample.ParseAndCompare("1.2.0-beta.1+build42", "1.2.0")
	if err != nil {
		fmt.Fprintf(os.Stderr, "unexpected error: %v\n", err)
		os.Exit(1)
	}
	if str != "1.2.0-beta.1+build42" {
		fmt.Fprintf(os.Stderr, "expected string 1.2.0-beta.1+build42, got %s\n", str)
		os.Exit(1)
	}
	if !less {
		fmt.Fprintf(os.Stderr, "expected 1.2.0-beta.1+build42 < 1.2.0\n")
		os.Exit(1)
	}
	if len(segs) < 3 || segs[0] != 1 || segs[1] != 2 || segs[2] != 0 {
		fmt.Fprintf(os.Stderr, "unexpected segments: %v\n", segs)
		os.Exit(1)
	}
	if pre != "beta.1" {
		fmt.Fprintf(os.Stderr, "expected prerelease beta.1, got %s\n", pre)
		os.Exit(1)
	}

	v, err := version.NewVersion("2.0.1+meta9")
	if err != nil {
		fmt.Fprintf(os.Stderr, "unexpected error: %v\n", err)
		os.Exit(1)
	}
	if v.Metadata() != "meta9" {
		fmt.Fprintf(os.Stderr, "expected metadata meta9, got %s\n", v.Metadata())
		os.Exit(1)
	}

	if !sample.IsInvalid("not-a-valid-version") {
		fmt.Fprintf(os.Stderr, "expected error for invalid version string\n")
		os.Exit(1)
	}
}