gtk: extract translations from Zig source code

po/com.mitchellh.ghostty.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: com.mitchellh.ghostty\n"
 "Report-Msgid-Bugs-To: [email protected]\n"
-"POT-Creation-Date: 2025-02-26 14:34+0100\n"
+"POT-Creation-Date: 2025-02-27 12:03+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <[email protected]>\n"
@@ -132,6 +132,7 @@ msgid "Terminal Inspector"
 msgstr ""
 
 #: src/apprt/gtk/ui/1.0/menu-window-titlebar_menu.blp:102
+#: src/apprt/gtk/Window.zig:923
 msgid "About Ghostty"
 msgstr ""
 
@@ -175,3 +176,12 @@ msgid ""
 "Pasting this text into the terminal may be dangerous as it looks like some "
 "commands may be executed."
 msgstr ""
+
+#: src/apprt/gtk/Window.zig:257
+msgid ""
+"⚠️ You're running a debug build of Ghostty! Performance will be degraded."
+msgstr ""
+
+#: src/apprt/gtk/Window.zig:904
+msgid "Ghostty Developers"
+msgstr ""

src/apprt/gtk/Window.zig

@@ -33,6 +33,7 @@ const TabView = @import("TabView.zig");
 const HeaderBar = @import("headerbar.zig");
 const version = @import("version.zig");
 const winproto = @import("winproto.zig");
+const i18n = @import("i18n.zig");
 
 const log = std.log.scoped(.gtk);
 
@@ -253,7 +254,7 @@ pub fn init(self: *Window, app: *App) !void {
     // This is a really common issue where people build from source in debug and performance is really bad.
     if (comptime std.debug.runtime_safety) {
         const warning_box = c.gtk_box_new(c.GTK_ORIENTATION_VERTICAL, 0);
-        const warning_text = "⚠️ You're running a debug build of Ghostty! Performance will be degraded.";
+        const warning_text = i18n._("⚠️ You're running a debug build of Ghostty! Performance will be degraded.");
         if (adwaita.versionAtLeast(1, 3, 0)) {
             const banner = c.adw_banner_new(warning_text);
             c.adw_banner_set_revealed(@ptrCast(banner), 1);
@@ -900,7 +901,7 @@ fn gtkActionAbout(
             "application-name",
             name,
             "developer-name",
-            "Ghostty Developers",
+            i18n._("Ghostty Developers"),
             "application-icon",
             icon,
             "version",
@@ -919,7 +920,7 @@ fn gtkActionAbout(
             "logo-icon-name",
             icon,
             "title",
-            "About Ghostty",
+            i18n._("About Ghostty"),
             "version",
             build_config.version_string.ptr,
             "website",

src/apprt/gtk/i18n.zig

@@ -33,3 +33,5 @@ pub fn init(alloc: std.mem.Allocator) !void {
 // as libintl.h isn't always easily available (e.g. in musl)
 extern fn bindtextdomain(domainname: [*:0]const u8, dirname: [*:0]const u8) ?[*:0]const u8;
 extern fn textdomain(domainname: [*:0]const u8) ?[*:0]const u8;
+pub extern fn gettext(msgid: [*:0]const u8) [*:0]const u8;
+pub const _ = gettext;

src/build/GhosttyI18n.zig

@@ -15,7 +15,7 @@ pub fn init(b: *std.Build, cfg: *const Config) !GhosttyI18n {
     var steps = std.ArrayList(*std.Build.Step).init(b.allocator);
     errdefer steps.deinit();
 
-    addUpdateStep(b);
+    try addUpdateStep(b);
 
     if (cfg.app_runtime == .gtk) {
         // Output the .mo files used by the GTK apprt
@@ -41,10 +41,10 @@ pub fn install(self: *const GhosttyI18n) void {
     for (self.steps) |step| self.owner.getInstallStep().dependOn(step);
 }
 
-fn addUpdateStep(b: *std.Build) void {
+fn addUpdateStep(b: *std.Build) !void {
     const pot_step = b.step("update-translations", "Update translation files");
 
-    const gettext = b.addSystemCommand(&.{
+    const xgettext = b.addSystemCommand(&.{
         "xgettext",
         "--language=C", // Silence the "unknown extension" errors
         "--from-code=UTF-8",
@@ -63,21 +63,35 @@ fn addUpdateStep(b: *std.Build) void {
         // would be added to the file as its location, which differs for
         // everyone's checkout of the repository.
         // This comes at a cost of losing per-file caching, of course.
-        gettext.addArg(std.fmt.comptimePrint("src/apprt/gtk/ui/{[major]}.{[minor]}/{[name]s}.blp", blp));
+        xgettext.addArg(std.fmt.comptimePrint("src/apprt/gtk/ui/{[major]}.{[minor]}/{[name]s}.blp", blp));
+    }
+
+    var gtk_files = try b.build_root.handle.openDir("src/apprt/gtk", .{ .iterate = true });
+    defer gtk_files.close();
+
+    var walk = try gtk_files.walk(b.allocator);
+    defer walk.deinit();
+
+    while (try walk.next()) |src| {
+        switch (src.kind) {
+            .file => if (!std.mem.endsWith(u8, src.basename, ".zig")) continue,
+            else => continue,
+        }
+        xgettext.addArg((b.pathJoin(&.{ "src/apprt/gtk", src.path })));
     }
 
     // Don't make Zig cache it
-    gettext.has_side_effects = true;
+    xgettext.has_side_effects = true;
 
-    const new_pot = gettext.captureStdOut();
+    const new_pot = xgettext.captureStdOut();
 
     const wf = b.addWriteFiles();
     wf.addCopyFileToSource(new_pot, "po/" ++ domain ++ ".pot");
 
     inline for (locales) |locale| {
         const msgmerge = b.addSystemCommand(&.{ "msgmerge", "-q" });
         msgmerge.addFileArg(b.path("po/" ++ locale ++ ".po"));
-        msgmerge.addFileArg(gettext.captureStdOut());
+        msgmerge.addFileArg(xgettext.captureStdOut());
 
         wf.addCopyFileToSource(msgmerge.captureStdOut(), "po/" ++ locale ++ ".po");
     }