Add gnome-app template

templates/gnome/.gitignore.in

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+/_build
+/app
+/.flatpak
+/.flatpak-builder
+/subprojects/**/

templates/gnome/README.md

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+# ${APP_TITLE}
+
+${APP_SUMMARY}

templates/gnome/build-aux/flatpak/${APP_ID}.yaml

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+app-id: ${APP_ID}
+runtime: org.gnome.Platform
+runtime-version: master
+sdk: org.gnome.Sdk
+
+command: ${APP_NAME}
+finish-args:
+- --share=ipc
+- --socket=fallback-x11
+- --socket=wayland
+- --device=dri
+
+cleanup:
+- /include
+- /lib/pkgconfig
+- /share/pkgconfig
+- /man
+- /share/doc
+- /share/vala
+- /share/vala-*
+- '*.la'
+- '*.a'
+
+modules:
+
+# Libadwaita dependencies
+
+- name: libsass
+  buildsystem: meson
+  sources:
+  - type: git
+    url: https://github.com/lazka/libsass.git
+    branch: meson
+
+- name: sassc
+  buildsystem: meson
+  sources:
+  - type: git
+    url: https://github.com/lazka/sassc.git
+    branch: meson
+
+# Biography dependencies
+
+- name: libadwaita
+  buildsystem: meson
+  config-opts:
+  - -Dexamples=false
+  - -Dtests=false
+  sources:
+  - type: git
+    url: https://gitlab.gnome.org/GNOME/libadwaita.git
+    branch: main
+
+# Biography itself
+
+- name: ${APP_NAME}
+  builddir: true
+  buildsystem: meson
+  sources:
+  - type: dir
+    path: ../..

templates/gnome/build-aux/meson/build-and-run.sh

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+if [ ! -e _build ]
+then
+    meson _build -Dprefix=$(pwd)/app
+fi \
+&& ninja -C _build \
+&& ninja -C _build install \
+&& env \
+    GSETTINGS_SCHEMA_DIR=./app/share/glib-2.0/schemas \
+    LD_LIBRARY_PATH=./app/lib64/${APP_NAME} \
+    ./app/bin/${APP_NAME}

templates/gnome/build-aux/meson/postinstall.py

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+#!/usr/bin/env python3
+
+from os import environ, path
+from subprocess import call
+
+prefix = environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+datadir = path.join(prefix, 'share')
+destdir = environ.get('DESTDIR', '')
+
+# Package managers set this so we don't need to run
+if not destdir:
+    print('Updating icon cache...')
+    call(['gtk-update-icon-cache', '-qtf',
+          path.join(datadir, 'icons', 'hicolor')])
+
+    print('Updating desktop database...')
+    call(['update-desktop-database', '-q',
+          path.join(datadir, 'applications')])
+
+    print('Compiling GSettings schemas...')
+    call(['glib-compile-schemas',
+          path.join(datadir, 'glib-2.0', 'schemas')])

templates/gnome/data/${APP_ID}.appdata.xml.in.in

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>@APP_ID@</id>
+  <name>@APP_TITLE@</name>
+  <summary>@APP_SUMMARY@</summary>
+  <description>
+    <p>Some useful description</p>
+  </description>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0-or-later</project_license>
+  <provides>
+    <binary>@APP_NAME@</binary>
+  </provides>
+  <developer_name>${AUTHOR}</developer_name>
+  <url type="homepage">https://link.to/your/project</url>
+  <url type="bugtracker">https://link.to/your/project/issues</url>
+  <content_rating type="oars-1.1"></content_rating>
+  <releases>
+  </releases>
+</component>

templates/gnome/data/${APP_ID}.desktop.in.in

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+[Desktop Entry]
+Name=@APP_TITLE@
+Icon=@APP_ID@
+Exec=@APP_NAME@
+Terminal=false
+Type=Application
+Categories=Utility;GNOME;GTK;
+StartupNotify=true

templates/gnome/data/${APP_ID}.gschema.xml.in

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+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist gettext-domain="@APP_NAME@">
+  <schema id="@APP_ID@" path="@APP_PATH@">
+
+  </schema>
+</schemalist>

templates/gnome/data/meson.build

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+desktop_file = i18n.merge_file(
+  input: configure_file(
+    input: f'@app_id@.desktop.in.in',
+    output: f'@app_id@.desktop.in',
+    configuration: conf_data
+  ),
+  output: f'@app_id@.desktop',
+  type: 'desktop',
+  po_dir: '..' / 'po',
+  install: true,
+  install_dir: get_option('datadir') / 'applications'
+)
+
+desktop_utils = find_program('desktop-file-validate', required: false)
+if desktop_utils.found()
+  test('Validate desktop file', desktop_utils,
+    args: [desktop_file]
+  )
+endif
+
+appstream_file = i18n.merge_file(
+  input: configure_file(
+    input: f'@app_id@.appdata.xml.in.in',
+    output: f'@app_id@.appdata.xml.in',
+    configuration: conf_data
+  ),
+  output: f'@app_id@.appdata.xml',
+  po_dir: '../po',
+  install: true,
+  install_dir: get_option('datadir') / 'appdata'
+)
+
+appstream_util = find_program('appstream-util', required: false)
+if appstream_util.found()
+  test('Validate appstream file', appstream_util,
+    args: ['validate', appstream_file]
+  )
+endif
+
+gschema_file = configure_file(
+  input: f'@app_id@.gschema.xml.in',
+  output: f'@app_id@.gschema.xml',
+  configuration: conf_data,
+  install_dir: get_option('datadir') / 'glib-2.0' / 'schemas'
+)
+
+compile_schemas = find_program('glib-compile-schemas', required: false)
+if compile_schemas.found()
+  test('Validate schema file', compile_schemas,
+    args: ['--strict', '--dry-run', meson.current_build_dir()]
+  )
+endif
+
+scalable_dir = 'icons' / 'hicolor' / 'scalable' / 'apps'
+install_data(
+  scalable_dir / f'@app_id@.svg',
+  install_dir: get_option('datadir') / scalable_dir
+)
+
+symbolic_dir = 'icons' / 'hicolor' / 'symbolic' / 'apps'
+install_data(
+  symbolic_dir / f'@app_id@-symbolic.svg',
+  install_dir: get_option('datadir') / symbolic_dir
+)