[polari] main: Split out logging setup

[Florian Müllner <fmuellner src gnome org>]

commit e32b88b0b5a3550505fd08297da1e46de717ca34
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Feb 13 11:07:14 2021 +0100

    main: Split out logging setup
    
    Now that the file no longer contains a main() function, but
    is itself being executed as a script, it makes sense to keep
    it as simple and standard as possible.
    
    https://gitlab.gnome.org/GNOME/polari/-/merge_requests/177

 src/logging.js  | 35 +++++++++++++++++++++++++++++++++++
 src/main.js     | 36 +++---------------------------------
 src/meson.build |  1 +
 3 files changed, 39 insertions(+), 33 deletions(-)
---
diff --git a/src/logging.js b/src/logging.js
new file mode 100644
index 00000000..9b241f86
--- /dev/null
+++ b/src/logging.js
@@ -0,0 +1,35 @@
+import GLib from 'gi://GLib';
+
+const LOG_DOMAIN = 'Polari';
+
+function log(level, message) {
+    const { stack } = new Error();
+    let [, caller] = stack.split('\n');
+
+    // Map from resource- to source location
+    caller = caller.replace('resource:///org/gnome/Polari/js', 'src');
+
+    const [code, line] = caller.split(':');
+    const [func, file] = code.split(/\W*@/);
+    GLib.log_structured(LOG_DOMAIN, level, {
+        'MESSAGE': `${message}`,
+        'SYSLOG_IDENTIFIER': 'org.gnome.Polari',
+        'CODE_FILE': file,
+        'CODE_FUNC': func,
+        'CODE_LINE': line,
+    });
+}
+
+export function init() {
+    const { LogLevelFlags } = GLib;
+    globalThis.log      = msg => log(LogLevelFlags.LEVEL_MESSAGE, msg);
+    globalThis.debug    = msg => log(LogLevelFlags.LEVEL_DEBUG, msg);
+    globalThis.info     = msg => log(LogLevelFlags.LEVEL_INFO, msg);
+    globalThis.warning  = msg => log(LogLevelFlags.LEVEL_WARNING, msg);
+    globalThis.critical = msg => log(LogLevelFlags.LEVEL_CRITICAL, msg);
+    globalThis.error    = msg => log(LogLevelFlags.LEVEL_ERROR, msg);
+
+    // Log all messages when connected to the journal
+    if (GLib.log_writer_is_journald(2))
+        GLib.setenv('G_MESSAGES_DEBUG', LOG_DOMAIN, false);
+}
diff --git a/src/main.js b/src/main.js
index 87db61d1..7978597e 100755
--- a/src/main.js
+++ b/src/main.js
@@ -1,6 +1,7 @@
 import GLib from 'gi://GLib';
 
 import * as Config from './config.js';
+import * as Log from './logging.js';
 import { ngettext } from 'gettext';
 import { programInvocationName } from 'system';
 
@@ -30,40 +31,9 @@ pkg.requireSymbol('GLib', '2.0', 'log_variant');
 pkg.requireSymbol('Gspell', '1', 'Entry');
 pkg.requireSymbol('Gtk', '3.0', 'ScrolledWindow.propagate_natural_width');
 
-import { Application } from './application.js';
-
-var LOG_DOMAIN = 'Polari';
-
-function _makeLogFunction(level) {
-    return message => {
-        let { stack } = new Error();
-        let [, caller] = stack.split('\n');
-
-        // Map from resource- to source location
-        caller = caller.replace('resource:///org/gnome/Polari/js', 'src');
+Log.init();
 
-        let [code, line] = caller.split(':');
-        let [func, file] = code.split(/\W*@/);
-        GLib.log_structured(LOG_DOMAIN, level, {
-            'MESSAGE': `${message}`,
-            'SYSLOG_IDENTIFIER': 'org.gnome.Polari',
-            'CODE_FILE': file,
-            'CODE_FUNC': func,
-            'CODE_LINE': line,
-        });
-    };
-}
-
-globalThis.log      = _makeLogFunction(GLib.LogLevelFlags.LEVEL_MESSAGE);
-globalThis.debug    = _makeLogFunction(GLib.LogLevelFlags.LEVEL_DEBUG);
-globalThis.info     = _makeLogFunction(GLib.LogLevelFlags.LEVEL_INFO);
-globalThis.warning  = _makeLogFunction(GLib.LogLevelFlags.LEVEL_WARNING);
-globalThis.critical = _makeLogFunction(GLib.LogLevelFlags.LEVEL_CRITICAL);
-globalThis.error    = _makeLogFunction(GLib.LogLevelFlags.LEVEL_ERROR);
-
-// Log all messages when connected to the journal
-if (GLib.log_writer_is_journald(2))
-    GLib.setenv('G_MESSAGES_DEBUG', LOG_DOMAIN, false);
+import { Application } from './application.js';
 
 let application = new Application();
 if (GLib.getenv('POLARI_PERSIST'))
diff --git a/src/meson.build b/src/meson.build
index efc01f96..efd7108f 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -15,6 +15,7 @@ js_sources = [
   'initialSetup.js',
   'ircParser.js',
   'joinDialog.js',
+  'logging.js',
   'main.js',
   'mainWindow.js',
   'networksManager.js',