{"record":{"id":"20fae48915fbd435","repo":"GoogleContainerTools/skaffold","slug":"checking-terminal-colors-w","errorCode":null,"errorMessage":"checking terminal colors: %w","messagePattern":"checking terminal colors: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"pkg/skaffold/util/term/term.go","lineNumber":58,"sourceCode":"\n\tif f, ok := w.(descriptor); ok {\n\t\ttermFd := f.Fd()\n\t\tisTerm := term.IsTerminal(int(termFd))\n\t\treturn termFd, isTerm\n\t}\n\n\treturn 0, false\n}\n\nfunc SupportsColor(ctx context.Context) (bool, error) {\n\tif runtime.GOOS == constants.Windows {\n\t\treturn true, nil\n\t}\n\n\tcmd := exec.Command(\"tput\", \"colors\")\n\tres, err := util.RunCmdOut(ctx, cmd)\n\tif err != nil {\n\t\treturn false, fmt.Errorf(\"checking terminal colors: %w\", err)\n\t}\n\n\tnumColors, err := strconv.Atoi(strings.TrimSpace(string(res)))\n\tif err != nil {\n\t\treturn false, err\n\t}\n\n\treturn numColors > 0, nil\n}\n\nfunc WaitForKeyPress() error {\n\t// use rawMode so that we can read without the user to hit enter key.\n\tpreviousState, err := term.MakeRaw(int(os.Stdin.Fd()))\n\tif err != nil {\n\t\treturn err\n\t}\n\tdefer term.Restore(int(os.Stdin.Fd()), previousState)\n","sourceCodeStart":40,"sourceCodeEnd":76,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/pkg/skaffold/util/term/term.go#L40-L76","documentation":"SupportsColor shells out to `tput colors` (via util.RunCmdOut) to detect how many colors the terminal supports; this error wraps any failure of that external command. It is thrown because the exec failed — typically tput/ncurses is not installed, TERM is unset/unknown, or the process is not attached to a TTY. Callers SetupColors and the anonymous runtime-config wrapper treat it as a color-detection failure, not a fatal problem in most flows.","triggerScenarios":"Running Skaffold in an environment where `tput colors` is unavailable or exits non-zero: tput/ncurses not installed, TERM unset or set to an unknown terminal type, or executing inside a non-interactive container/CI runner without a TTY.","commonSituations":"Minimal Docker containers (alpine/scratch-based images) lacking ncurses-bin; CI systems (Jenkins, some GitLab runners) with TERM=dumb or unset; remote shells or Windows terminals where tput is missing.","solutions":["Install ncurses/tput in the environment (e.g. `apk add ncurses` or `apt-get install ncurses-bin`).","Set a valid TERM variable (e.g. export TERM=xterm-256color).","Force color behavior explicitly with Skaffold's color config / flags so terminal probing is skipped.","Run from an interactive TTY or set the color scheme programmatically instead of relying on auto-detection."],"exampleFix":"// before\nexport TERM=dumb   # tput colors fails with unknown terminal\n// after\nexport TERM=xterm-256color   # or: apk add ncurses in the container image","handlingStrategy":"fallback","validationCode":"// detect the environment before running skaffold\nif _, err := exec.LookPath(\"tput\"); err != nil || os.Getenv(\"TERM\") == \"\" || os.Getenv(\"TERM\") == \"dumb\" {\n    os.Setenv(\"TERM\", \"xterm-256color\")\n}","typeGuard":null,"tryCatchPattern":"colors, err := term.SupportsColor(ctx)\nif err != nil {\n    log.Entry(ctx).Warnf(\"color detection failed (%v), defaulting to plain output\", err)\n    colors = false // fall back to no-color / fixed palette\n}","preventionTips":["Install ncurses/tput in images and CI runners that run Skaffold.","Always export a valid TERM (never TERM=dumb) in automation.","Configure color output explicitly instead of relying on auto-detection in non-TTY environments."],"tags":["terminal","tput","exec","colors"],"backgroundTag":"tput-command-not-found","analyzedSha":"a1189de023efc32d4b8e11f395acc678aa555011","analyzedAt":"2026-09-05T12:09:27.064Z","contentChangedAt":"2026-09-05T12:09:27.064Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}