meson: adds post meson setup/--reconfigure summary for auto features

As suggested by George Kiagiadakis, adds calls to summary() function
for each feature that is by default set to auto, so that an overview
of their effective state is printed at the end of meson setup or
meson --reconfigure command.

Currently ordering is a bit messy but tidying it up would detach
the summary() functions from the dependencies they rely on and could
be done later along with meson_options.txt re-ordering so that the
two match as much as possible.

meson.build

@@ -288,6 +288,8 @@ endif
 
 systemd = dependency('systemd', required: get_option('systemd'))
 systemd_dep = dependency('libsystemd',required: get_option('systemd'))
+summary({'systemd conf data': systemd.found()}, bool_yn: true)
+summary({'libsystemd': systemd_dep.found()}, bool_yn: true)
 if systemd.found() and systemd_dep.found()
   cdata.set('HAVE_SYSTEMD', 1)
 endif
@@ -317,12 +319,18 @@ dl_lib = cc.find_library('dl', required : false)
 pthread_lib = dependency('threads')
 dbus_dep = dependency('dbus-1')
 sdl_dep = dependency('sdl2', required : get_option('sdl2'))
+summary({'SDL 2': sdl_dep.found()}, bool_yn: true, section: 'Misc dependencies')
 ncurses_dep = dependency('ncursesw', required : false)
 sndfile_dep = dependency('sndfile', version : '>= 1.0.20', required : get_option('sndfile'))
+summary({'sndfile': sndfile_dep.found()}, bool_yn: true, section: 'pw-cat/pw-play/pw-dump tool')
 pulseaudio_dep = dependency('libpulse', required : get_option('libpulse'))
+summary({'libpulse': pulseaudio_dep.found()}, bool_yn: true, section: 'Streaming between daemons')
 avahi_dep = dependency('avahi-client', required : get_option('avahi'))
+summary({'Avahi DNS-SD (Zeroconf)': avahi_dep.found()}, bool_yn: true,
+  section: 'Streaming between daemons')
 
 libusb_dep = dependency('libusb-1.0', required : get_option('libusb'))
+summary({'libusb (Bluetooth quirks)': libusb_dep.found()}, bool_yn: true, section: 'Backend')
 if libusb_dep.found()
   cdata.set('HAVE_LIBUSB', 1)
 endif
@@ -349,7 +357,9 @@ gst_deps_def = {
 gst_dep = []
 foreach depname, kwargs: gst_deps_def
   dep = dependency(depname, required: gst_option, kwargs: kwargs)
+  summary({depname: dep.found()}, bool_yn: true, section: 'GStreamer modules')
   if not dep.found()
+    # Beware, there's logic below depending on the array clear here!
     gst_dep = []
     if get_option('gstreamer-device-provider').enabled()
       error('`gstreamer-device-provider` is enabled but `@0@` was not found.'.format(depname))
@@ -359,6 +369,10 @@ foreach depname, kwargs: gst_deps_def
   gst_dep += [dep]
 endforeach
 
+# This code relies on the array being empty if any dependency was not found
+gst_dp_found = gst_dep.length() > 0
+summary({'gstreamer-device-provider': gst_dp_found}, bool_yn: true, section: 'Backend')
+
 if not get_option('gstreamer-device-provider').disabled()
   cdata.set('HAVE_GSTREAMER_DEVICE_PROVIDER', 1)
 endif
@@ -366,6 +380,7 @@ endif
 webrtc_dep = dependency('webrtc-audio-processing',
   version : ['>= 0.2', '< 1.0'],
   required : get_option('echo-cancel-webrtc'))
+summary({'WebRTC Echo Canceling': webrtc_dep.found()}, bool_yn: true, section: 'Misc dependencies')
 
 if webrtc_dep.found()
   cdata.set('HAVE_WEBRTC', 1)
@@ -384,6 +399,7 @@ libinotify_dep = (build_machine.system() == 'freebsd'
 libintl_dep = cc.find_library('intl', required: false)
 
 alsa_dep = dependency('alsa', version : '>=1.1.7', required: get_option('pipewire-alsa'))
+summary({'pipewire-alsa': alsa_dep.found()}, bool_yn: true)
 
 installed_tests_metadir = pipewire_datadir / 'installed-tests' / pipewire_name
 installed_tests_execdir = pipewire_libexecdir / 'installed-tests' / pipewire_name
@@ -421,6 +437,7 @@ if doxygen.found()
 endif
 
 xmltoman = find_program('xmltoman', required : get_option('man'))
+summary({'Manpage generation': xmltoman.found()}, bool_yn: true)
 if xmltoman.found()
   subdir('man')
 endif

spa/meson.build

@@ -18,22 +18,33 @@ if not get_option('spa-plugins').disabled()
 
   # plugin-specific dependencies
   alsa_dep = dependency('alsa', required: get_option('alsa'))
+  summary({'ALSA': alsa_dep.found()}, bool_yn: true, section: 'Backend')
   bluez_dep = dependency('bluez', version : '>= 4.101', required: get_option('bluez5'))
+  summary({'Bluetooth audio': bluez_dep.found()}, bool_yn: true, section: 'Backend')
   if bluez_dep.found()
     sbc_dep = dependency('sbc', required: get_option('bluez5'))
+    summary({'SBC': sbc_dep.found()}, bool_yn: true, section: 'Bluetooth audio codecs')
     ldac_dep = dependency('ldacBT-enc', required : get_option('bluez5-codec-ldac'))
+    summary({'LDAC': ldac_dep.found()}, bool_yn: true, section: 'Bluetooth audio codecs')
     ldac_abr_dep = dependency('ldacBT-abr', required : get_option('bluez5-codec-ldac'))
+    summary({'LDAC ABR': ldac_abr_dep.found()}, bool_yn: true, section: 'Bluetooth audio codecs')
     aptx_dep = dependency('libopenaptx', version : '< 0.2.1', required : get_option('bluez5-codec-aptx'))
+    summary({'aptX': aptx_dep.found()}, bool_yn: true, section: 'Bluetooth audio codecs')
     fdk_aac_dep = dependency('fdk-aac', required : get_option('bluez5-codec-aac'))
+    summary({'AAC': fdk_aac_dep.found()}, bool_yn: true, section: 'Bluetooth audio codecs')
   endif
   avcodec_dep = dependency('libavcodec', required: get_option('ffmpeg'))
   jack_dep = dependency('jack', version : '>= 1.9.10', required: get_option('jack'))
+  summary({'JACK2': jack_dep.found()}, bool_yn: true, section: 'Backend')
   vulkan_dep = dependency('vulkan', disabler : true, version : '>= 1.1.69', required: get_option('vulkan'))
+  summary({'Vulkan': vulkan_dep.found()}, bool_yn: true, section: 'Misc dependencies')
   vulkan_headers = cc.has_header('vulkan/vulkan.h', dependencies : vulkan_dep)
   libcamera_dep = dependency('camera', required: get_option('libcamera'))
+  summary({'libcamera': libcamera_dep.found()}, bool_yn: true, section: 'Camera portal')
 
   # common dependencies
   libudev_dep = dependency('libudev', required: alsa_dep.found() or get_option('udev').enabled() or get_option('v4l2').enabled())
+  summary({'Udev': libudev_dep.found()}, bool_yn: true, section: 'Backend')
 
   subdir('plugins')
 endif

spa/plugins/libcamera/meson.build

@@ -6,6 +6,7 @@ libcamera_sources = ['libcamera.c',
 
 libdrm_dep = dependency('libdrm', version : '>= 2.4.98',
                         required : get_option('libcamera'))
+summary({'libdrm': libdrm_dep.found()}, bool_yn: true, section: 'Camera portal')
 if libdrm_dep.found()
 libcameralib = shared_library('spa-libcamera',
                           libcamera_sources,

src/daemon/meson.build

@@ -30,7 +30,7 @@ sm_choice = get_option('default-session-manager')
 
 if sm_choice == 'media-session'
   if get_option('session-managers') == []
-    warning(' to use pw-uninstalled.sh manually edit pipewire-uninstalled.conf')
+    summary({'No session manager': 'pw-uninstalled.sh will not work out of the box!'})
   elif not build_ms
     error('media-session is the chosen session manager but it won\'t be built')
   endif

src/modules/meson.build

@@ -180,6 +180,7 @@ if avahi_dep.found()
 endif
 
 roc_lib = cc.find_library('roc', required: get_option('roc'))
+summary({'ROC': roc_lib.found()}, bool_yn: true, section: 'Streaming between daemons')
 if roc_lib.found()
   pipewire_module_protocol_pulse_sources += [
     'module-protocol-pulse/modules/module-roc-sink.c',

src/tools/meson.build

@@ -26,7 +26,9 @@ if ncurses_dep.found()
   )
 endif
 
+build_pw_cat = false
 if not get_option('pw-cat').disabled() and sndfile_dep.found()
+  build_pw_cat = true
 
   pwcat_sources = [
     'pw-cat.c',
@@ -54,3 +56,4 @@ if not get_option('pw-cat').disabled() and sndfile_dep.found()
 elif not sndfile_dep.found() and get_option('pw-cat').enabled()
 	error('pw-cat is enabled but required dependency `sndfile` was not found.')
 endif
+summary({'Build pw-cat tool': build_pw_cat}, bool_yn: true, section: 'pw-cat/pw-play/pw-dump tool')