Add session conf

meson_options.txt

@@ -1,3 +1,5 @@
 option('supported_languages', type : 'string', value : 'aa;ab;ae;af;ak;am;an;ar;as;ast;av;ay;az;ba;be;bg;bh;bi;bm;bn;bo;br;bs;ca;ce;ch;ckb;co;cr;cs;cu;cv;cy;da;de;de_CH;de_DE;dv;dz;ee;el;en;en_US;en_AU;en_CA;en_GB;eo;es;et;eu;fa;ff;fi;fj;fo;fr;fr_BE;fr_CA;fr_FR;fy;ga;gd;gl;gn;gu;gv;ha;he;hi;ho;hr;ht;hu;hy;hz;ia;id;ie;ig;ii;ik;io;is;it;iu;ja;jv;ka;kab;kg;ki;kj;kk;kl;km;kn;ko;kr;ks;ku;kv;kw;ky;la;lb;lg;li;ln;lo;lt;lu;lv;mg;mh;mi;mk;ml;mn;mo;mr;ms;mt;my;na;nb;nd;ne;ng;nl;nn;nr;nv;ny;oc;oj;om;or;os;pa;pi;pl;ps;pt;pt_PT;pt_BR;qu;rm;rn;ro;ru;rue;rw;sa;sc;sd;se;sg;si;sk;sl;sm;sma;sn;so;sq;sr;ss;st;su;sv;sw;szl;ta;te;tg;th;ti;tk;tl;tn;to;tr;ts;tt;tw;ty;udm;ug;uk;ur;uz;ve;vi;vo;wa;wo;xh;yi;yo;za;zh;zh_CN;zh_HK;zh_TW;zu', description : 'The list of supported languages')
 option('preferred_languages', type : 'string', value : 'en;zh;es;fr;pt;ru;de', description : 'A prioritized list of languages')
 option('installer_backend', type : 'combo', choices : ['distinst'], value : 'distinst')
+
+option('systemduserunitdir', type: 'string', value: '', description : 'Custom directory for systemd user units')

session/meson.build

@@ -1,6 +1,12 @@
 autostartdir = get_option('sysconfdir') / 'xdg' / 'autostart'
 schemadir = get_option('datadir') / 'glib-2.0' / 'schemas'
 
+gsd_components = [
+    'org.gnome.SettingsDaemon.MediaKeys',
+    'org.gnome.SettingsDaemon.Power',
+    'org.gnome.SettingsDaemon.XSettings',
+]
+
 install_data(
     'autostart.desktop',
     install_dir: autostartdir,
@@ -33,3 +39,33 @@ install_subdir(
     install_dir: autostartdir,
     strip_directory: true
 )
+
+systemd_userunitdir = get_option('systemduserunitdir')
+if systemd_userunitdir == ''
+    systemd_userunitdir = systemd_dep.get_pkgconfig_variable('systemduserunitdir', define_variable: ['prefix', get_option('prefix')])
+endif
+
+desktop_plain = 'installer'
+
+shell_component = {
+    desktop_plain: 'io.elementary.installer.compositor',
+}
+
+required_components = {
+    desktop_plain: gsd_components,
+}
+
+gnome_session_wanted_targets = []
+foreach component: required_components[desktop_plain]
+    gnome_session_wanted_targets += 'Wants=@[email protected]'.format(component)
+endforeach
+
+session_config = configure_file(
+    input: 'session.conf.in',
+    output: 'session.conf',
+    configuration: {
+        'requires_component': shell_component[desktop_plain],
+        'wants_required_components': '\n'.join(gnome_session_wanted_targets),
+    },
+    install_dir: systemd_userunitdir / '[email protected]',
+)

session/session.conf.in

@@ -0,0 +1,4 @@
+[Unit]
+@wants_required_components@
+
+Requires=@[email protected]