Thales Maciel
71a332a6a1
Adds three small but high-leverage presentation tweaks for v0.1: 1. internal/cli/style is a new ~70 LOC package with Pass/Fail/Warn/ Dim/Bold helpers. Each is TTY-gated and obeys NO_COLOR. No external dep. Wired into the doctor PASS/FAIL/WARN status, the "banger:" error prefix on stderr, and the dim 'ready in <elapsed>' line. 2. internal/cli/errors translates rpc.ErrorResponse into user-facing text. operation_failed becomes invisible (the message wins); not_found, already_exists, bad_request, bad_version, unauthorized, unknown_method get short labels; unknown codes pass through. The daemon-attached op_id lands in dim parens — paste into journalctl --grep to find the daemon log line that produced the failure. 3. Tabwriter config converges on (0, 8, 2, ' ', 0) across every list/table command. The vm prune confirmation table picked up the right config; system install + system status switched from bare "key: value\n" lines to tabular form. printVMSpecLine drops its Unicode middle dot for an ASCII '|' so terminals without UTF-8 render cleanly. Tests cover translateRPCError for every code, style helpers no-op on non-TTY and under NO_COLOR. Smoke status greps switch from "key: value" to "key value" to match the new format. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
70 lines
2 KiB
Go
70 lines
2 KiB
Go
// Package style provides a tiny, conservative ANSI-color helper for
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// banger's CLI. The contract:
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//
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// - Each helper takes the writer the styled string is going to and
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// returns either the wrapped string or the plain one.
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// - "Wrapped" only happens when the writer is a TTY AND the
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// NO_COLOR environment variable is unset.
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// - No 256-color or truecolor; no theme system; no external dep.
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//
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// Banger's CLI uses these for status (pass/fail/warn), error
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// prefixes, and dim secondary text. Anything richer belongs in a
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// dedicated TUI layer that this package isn't.
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package style
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import (
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"io"
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"os"
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"strings"
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)
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// ANSI escape sequences. Kept private — callers compose meaning via
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// the named helpers (Pass/Fail/Warn/...), not raw codes.
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const (
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ansiReset = "\x1b[0m"
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ansiBold = "\x1b[1m"
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ansiDim = "\x1b[2m"
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ansiRed = "\x1b[31m"
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ansiGreen = "\x1b[32m"
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ansiYel = "\x1b[33m"
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)
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// Pass wraps s in green when w is a TTY and NO_COLOR is unset.
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func Pass(w io.Writer, s string) string { return wrap(w, ansiGreen, s) }
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// Fail wraps s in red.
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func Fail(w io.Writer, s string) string { return wrap(w, ansiRed, s) }
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// Warn wraps s in yellow.
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func Warn(w io.Writer, s string) string { return wrap(w, ansiYel, s) }
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// Dim wraps s in dim.
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func Dim(w io.Writer, s string) string { return wrap(w, ansiDim, s) }
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// Bold wraps s in bold.
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func Bold(w io.Writer, s string) string { return wrap(w, ansiBold, s) }
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// SupportsColor reports whether colored output should be emitted to
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// w. Exposed so callers that build multi-segment strings can avoid
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// duplicating the gate per call.
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func SupportsColor(w io.Writer) bool {
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if strings.TrimSpace(os.Getenv("NO_COLOR")) != "" {
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return false
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}
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file, ok := w.(*os.File)
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if !ok {
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return false
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}
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info, err := file.Stat()
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if err != nil {
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return false
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}
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return info.Mode()&os.ModeCharDevice != 0
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}
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func wrap(w io.Writer, code, s string) string {
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if !SupportsColor(w) {
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return s
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}
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return code + s + ansiReset
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}
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