Add ps1.sh

2026-01-24 02:18:55 +00:00
parent 6cac49b7c4
commit 4cdbad53ae
1 changed files with 109 additions and 0 deletions
--- a/ps1.sh
+++ b/ps1.sh
@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+# ps1.sh - Bash PS1 with emoji + optional animation helpers
+# Source this file:  source /path/to/ps1.sh
+# Then enable:       ps1_on
+# Optional animate:  psanimate 0.5
+# Stop animation:    psanimate_stop
+# Disable:           ps1_off
+
+# Only for interactive bash
+case "$-" in
+  *i*) ;;
+  *) return 0 ;;
+esac
+
+# ---- Emoji pools (edit these) ----
+# Keep them as simple strings; terminals must support the emoji glyphs.
+__PS1_EMOJI_FUN=( "🚀" "✨" "🔥" "🌈" "🧠" "🛠️" "📦" "🧩" "🧪" "⚡" "🐧" "🛰️" )
+
+# ---- Emoji function (simple random) ----
+_ps1_emoji() {
+  local n="${#__PS1_EMOJI_FUN[@]}"
+  # RANDOM is bash built-in
+  printf '%s' "${__PS1_EMOJI_FUN[RANDOM % n]}"
+}
+
+# ---- Your PS1 core (edit to taste) ----
+# This is intentionally simple: time, jobs, host, cwd, emoji.
+# Use \\[ \\] around non-printing escape sequences to keep line editing sane.
+_ps1_build() {
+  local emoji="$(_ps1_emoji)"
+  # Colors: 35 (purple) + 38 (cyan-ish) from your earlier style
+  printf '%b' \
+"\[\e[0m\]\[\e[38;5;35m\]╭─(\[\e[38;5;38m\]\t\[\e[38;5;35m\])-(\[\e[38;5;38m\]\j\[\e[38;5;35m\])-(\[\e[38;5;38m\]\H\[\e[38;5;35m\])-(\[\e[38;5;38m\]\w\[\e[38;5;35m\])\n\[\e[38;5;35m\]╰──${emoji} \[\e[0m\]"
+}
+
+# ---- PROMPT_COMMAND hook (updates PS1 each prompt) ----
+# We add our updater without nuking an existing PROMPT_COMMAND.
+__PS1_PREV_PROMPT_COMMAND=""
+
+_ps1_set_prompt_command() {
+  # Save existing PROMPT_COMMAND once
+  if [[ -z "${__PS1_PREV_PROMPT_COMMAND+x}" || -z "$__PS1_PREV_PROMPT_COMMAND" ]]; then
+    __PS1_PREV_PROMPT_COMMAND="${PROMPT_COMMAND-}"
+  fi
+
+  local updater='_PS1=$(_ps1_build); export PS1="$_PS1"'
+  if [[ -z "${PROMPT_COMMAND-}" ]]; then
+    PROMPT_COMMAND="$updater"
+  else
+    # Avoid duplicating if user runs ps1_on multiple times
+    case "$PROMPT_COMMAND" in
+      *"_ps1_build"*) : ;;
+      *)
+        PROMPT_COMMAND="$updater; $PROMPT_COMMAND"
+        ;;
+    esac
+  fi
+}
+
+_ps1_restore_prompt_command() {
+  PROMPT_COMMAND="${__PS1_PREV_PROMPT_COMMAND-}"
+}
+
+# ---- Public controls ----
+ps1_on() {
+  _ps1_set_prompt_command
+  # Force immediate update
+  _PS1="$(_ps1_build)"; export PS1="$_PS1"
+}
+
+ps1_off() {
+  psanimate_stop >/dev/null 2>&1 || true
+  _ps1_restore_prompt_command
+}
+
+# ---- Animation helpers (simple loop that forces prompt refresh) ----
+# This follows the same basic idea as in the Medium post: background loop updates prompt periodically. :contentReference[oaicite:2]{index=2}
+__PSANIMATE_PIDFILE="/tmp/psanimatepid-$$"
+
+psanimate() {
+  local interval="${1:-0.5}"
+
+  # Stop existing animator for this shell, if any
+  psanimate_stop >/dev/null 2>&1 || true
+
+  # Ensure prompt is enabled
+  ps1_on
+
+  (
+    while :; do
+      # Trigger a prompt rebuild by setting PS1; next prompt draw will use it.
+      _PS1="$(_ps1_build)"; export PS1="$_PS1"
+      sleep "$interval"
+    done
+  ) &
+
+  echo "$!" > "$__PSANIMATE_PIDFILE"
+}
+
+psanimate_stop() {
+  if [[ -f "$__PSANIMATE_PIDFILE" ]]; then
+    local pid
+    pid="$(cat "$__PSANIMATE_PIDFILE" 2>/dev/null || true)"
+    if [[ -n "${pid:-}" ]]; then
+      kill "$pid" 2>/dev/null || true
+    fi
+    rm -f "$__PSANIMATE_PIDFILE"
+  fi
+}