Files
mgsh/colors.go
T
2026-07-28 15:25:54 +02:00

97 lines
2.8 KiB
Go

package main
import (
"fmt"
"strconv"
"strings"
"unicode/utf8"
)
// Colors for the prompt, banner and output, as 24-bit truecolor escapes: the
// Catppuccin Mocha accents with a warm white and three greys of its own.
const (
cReset = "\033[0m"
cBold = "\033[1m"
cDim = "\033[2m"
cYellow = "\033[38;2;249;226;175m" // #f9e2af
cOrange = "\033[38;2;250;179;135m" // #fab387
cRed = "\033[38;2;243;139;168m" // #f38ba8
cGreen = "\033[38;2;148;226;213m" // #94e2d5
cBlue = "\033[38;2;180;190;254m" // #b4befe
cPink = "\033[38;2;245;178;247m" // #f5b2f7
cViolet = "\033[38;2;203;166;247m" // #cba6f7
cWhite = "\033[38;2;240;240;234m" // #f0f0ea
cGrey = "\033[38;2;170;170;187m" // #aaaabb
cDark = "\033[38;2;119;119;136m" // #777788
cDarker = "\033[38;2;68;68;85m" // #444455
)
// col wraps s in color c, but only when color output is enabled.
func col(c, s string) string {
if useColor {
return c + s + cReset
}
return s
}
// errorln prints an error/status message in red (when color is enabled).
func errorln(msg string) {
fmt.Println(col(cRed, msg))
}
// padRight pads s with trailing spaces to a width of n columns. It counts
// runes, not bytes: the overview pads fields holding ↑ ↓ ✓, each of which is
// one column wide but three bytes long.
func padRight(s string, n int) string {
if l := utf8.RuneCountInString(s); l < n {
return s + strings.Repeat(" ", n-l)
}
return s
}
// formatRepoList renders the server listing for `list`: the name first, in a
// column wide enough for the longest one, then the date, and for archives the
// size. Names come first because that is what the eye scans for; putting the
// ragged date there instead is what made the old output hard to read.
//
// The order is left as it arrives: `ls -ltr` sorts by modification time, and
// `push` touches the bare repository, so the most recently worked-on project
// ends up closest to the prompt.
func formatRepoList(entries []lsEntry, withSize bool) string {
width := 0
for _, e := range entries {
if len(e.name) > width {
width = len(e.name)
}
}
var b strings.Builder
for _, e := range entries {
fmt.Fprintf(&b, " %s %s", col(cGreen, padRight(e.name, width)), col(cYellow, e.date))
if withSize {
fmt.Fprintf(&b, " %s", col(cDark, fmt.Sprintf("%7s", humanSize(e.size))))
}
b.WriteByte('\n')
}
return b.String()
}
// humanSize renders a byte count compactly, the way `ls -h` does: a decimal
// only while it still carries information, so "3.2M" but "512K".
func humanSize(n int64) string {
const unit = 1024
if n < unit {
return strconv.FormatInt(n, 10) + "B"
}
div, exp := int64(unit), 0
for v := n / unit; v >= unit && exp < 4; v /= unit {
div *= unit
exp++
}
v := float64(n) / float64(div)
if v < 10 {
return fmt.Sprintf("%.1f%c", v, "KMGTP"[exp])
}
return fmt.Sprintf("%.0f%c", v, "KMGTP"[exp])
}