Get basic Github CI working.

This adds basic coverage only -- e.g. non-luajit is not covered (and
should be), as well as other Linux distributions.

`make` and `make run-tests` are separated into separate steps so that
the build output (which is pretty verbose) can be collapsed separately.

The Github Actions builders are currently using Ubuntu 22.04 LTS, which
contains a slightly older glib without the `G_APPLICATION_DEFAULT_FLAGS`
symbol; turns out a conditional check was already there but was slightly
off, so fixing that in passing.

.github/workflows/tests.yml

@@ -13,5 +13,16 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+    - name: Install depenencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install luajit libluajit-5.1-dev libjavascriptcoregtk-4.0-dev libwebkit2gtk-4.1-dev libgtk-3-dev libglib2.0-dev luarocks
+    - name: Install lua dependencies
+      run: |
+        sudo luarocks --lua-version 5.1 install luafilesystem
+        sudo luarocks --lua-version 5.1 install luassert
+        sudo luarocks --lua-version 5.1 install luacheck
+    - name: make
+      run: make
     - name: make run-tests
       run: make run-tests

clib/unique.c

@@ -78,7 +78,7 @@ luaH_unique_new(lua_State *L)
 
     GError *error = NULL;
     if (!globalconf.application) {
-#if GTK_CHECK_VERSION(2,74,0)
+#if GLIB_CHECK_VERSION(2,74,0)
         globalconf.application = gtk_application_new(name, G_APPLICATION_DEFAULT_FLAGS);
 #else
         globalconf.application = gtk_application_new(name, G_APPLICATION_FLAGS_NONE);