feat(users/Profpatsch/alacritty): add dbus theme change

For trying out a bunch of themes in quick succession.
Also note down a few of the cooler themes.

Change-Id: I0da80cc0945dba03d3592f28f4c34df4b5969e82
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12893
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

users/Profpatsch/alacritty-change-color-scheme/alacritty-change-color-scheme.js

@@ -20,7 +20,7 @@ const { setTimeout } = require('node:timers/promises');
 const { promisify } = require('util');
 const { pseudoRandomBytes } = require('crypto');
 const { execFile } = require('node:child_process');
-const { readdir } = require('fs/promises');
+const { readdir, realpath, access } = require('fs/promises');
 
 // NB: this code is like 80% copilot generated, and seriously missing error handling.
 // It might break at any time, but for now it seems to work lol.
@@ -33,8 +33,8 @@ let darkThemeName = process.argv[3] ?? 'alacritty_0_12';
 let lightThemeName = process.argv[4] ?? 'dayfox';
 assert(themeDir, 'Theme directory is required');
 
-const darkTheme = getThemePathSync(darkThemeName);
-const lightTheme = getThemePathSync(lightThemeName);
+let darkTheme = getThemePathSync(darkThemeName);
+let lightTheme = getThemePathSync(lightThemeName);
 
 console.log(`Dark theme: ${darkTheme}`);
 console.log(`Light theme: ${lightTheme}`);
@@ -291,8 +291,10 @@ if (!process.env.XDG_CONFIG_HOME) {
   process.env.XDG_CONFIG_HOME = process.env.HOME + '/.config';
 }
 
-/**
+/** get the path of the theme config file synchronously
+ *
  * @param {string} theme
+ * @returns {string}
  * */
 function getThemePathSync(theme) {
   const path = `${themeDir}/${theme}.toml`;
@@ -301,6 +303,22 @@ function getThemePathSync(theme) {
   return absolutePath;
 }
 
+/** get the path of the theme config file
+ *
+ * @param {string} theme
+ * @returns {Promise<string | null>} null if the theme file does not exist
+ * */
+async function getThemePath(theme) {
+  const path = `${themeDir}/${theme}.toml`;
+  try {
+    const absolutePath = await realpath(path);
+    await access(absolutePath);
+    return absolutePath;
+  } catch (err) {
+    return null;
+  }
+}
+
 /** write new color scheme
  *
  * @param {'prefer-dark' | 'prefer-light'} cs
@@ -407,6 +425,10 @@ async function exportColorSchemeDbusInterface() {
     name: 'de.profpatsch.alacritty.ColorScheme',
     methods: {
       SetColorScheme: ['s', ''],
+      // first argument: 'dark' | 'light'
+      // second argument: the theme name (one of the themes in the theme directory)
+      // will only be applied during the run-time of this program, and reset on restart
+      SetColorSchemeTheme: ['ss', ''],
     },
   };
 
@@ -416,6 +438,28 @@ async function exportColorSchemeDbusInterface() {
       console.log(`SetColorScheme called with ${cs}`);
       writeAlacrittyColorConfigIfDifferent(cs);
     },
+    SetColorSchemeTheme: async function (
+      /** @type {string} */ cs,
+      /** @type {string} */ theme,
+    ) {
+      console.log(`SetColorSchemeTheme called with ${cs} and theme ${theme}`);
+      if (cs !== 'dark' && cs !== 'light') {
+        console.warn(`Invalid color scheme ${cs}`);
+        return;
+      }
+      const themePath = await getThemePath(theme);
+      if (themePath === null) {
+        return;
+      }
+      if (cs === 'dark') {
+        darkTheme = themePath;
+      }
+      if (cs === 'light') {
+        lightTheme = themePath;
+      }
+      console.log(`Setting color scheme ${cs} with theme ${themePath}`);
+      writeAlacrittyColorConfig(cs === 'dark' ? 'prefer-dark' : 'prefer-light');
+    },
   };
 
   try {

users/Profpatsch/alacritty-change-color-scheme/cool-themes

@@ -0,0 +1,8 @@
+ayu_mirage
+catppuccin
+gruvbox_dark
+inferno
+monokai_pro
+
+
+night_owlish_light