golang.org/x/term v0.0.0-20201117132131-f5c789dd3221: IsTerminal

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/term.IsTerminal in pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221
Demonstrate these symbols/APIs:
  - golang.org/x/term.IsTerminal

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:f36d28bf49cf3a2296d2ab012783ce934a3321bd7c3f370e8049b4d2e80f7879","contract":["term.IsTerminal reports whether the given file descriptor is a terminal"],"goal":"verify golang.org/x/term.IsTerminal in pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221","kind":"HOW","packages":["pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221"],"schemaVersion":1,"symbols":["golang.org/x/term.IsTerminal"]},"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/term@v0.0.0-20201117132131-f5c789dd3221"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221","symbols":["golang.org/x/term.IsTerminal"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require golang.org/x/term v0.0.0-20201117132131-f5c789dd3221

require golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 // indirect

golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/term.IsTerminal in pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/term@v0.0.0-20201117132131-f5c789dd3221"
  ],
  "symbols": [
    "golang.org/x/term.IsTerminal"
  ]
}

package main

import (
	"fmt"
	"os"

	"golang.org/x/term"
)

func main() {
	if term.IsTerminal(-1) {
		fmt.Fprintln(os.Stderr, "expected IsTerminal(-1) to be false")
		os.Exit(1)
	}

	r, w, err := os.Pipe()
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to create pipe: %v\n", err)
		os.Exit(1)
	}
	defer r.Close()
	defer w.Close()

	if term.IsTerminal(int(r.Fd())) {
		fmt.Fprintln(os.Stderr, "expected pipe reader to not be a terminal")
		os.Exit(1)
	}
	if term.IsTerminal(int(w.Fd())) {
		fmt.Fprintln(os.Stderr, "expected pipe writer to not be a terminal")
		os.Exit(1)
	}
}