Warn on missing dependencies

references Guake#1077

Author: gsemet

.travis.yml

@@ -32,11 +32,10 @@ script:
             virtualenv test-rtd
             . ./test-rtd/bin/activate
             pip install -r requirements-dev.txt
-            guake -h
             rm -rf test-rtd
         )
     # for dev
-    - make dev
+    - make dev-travis
     # check
     - make check
     - make build

Makefile

@@ -51,10 +51,14 @@ reset:
 all: clean dev style checks dists test docs
 
 dev: clean-ln-venv ensure-pip pipenv-install-dev requirements ln-venv setup-githook prepare-install
+dev-travis: ensure-pip-system pipenv-install-dev requirements ln-venv setup-githook prepare-install
 
 ensure-pip:
 	./scripts/bootstrap-dev-pip.sh
 
+ensure-pip-system:
+	./scripts/bootstrap-dev-pip.sh system
+
 dev-no-pipenv: clean
 	virtualenv --python $(PYTHON_INTERPRETER) .venv
 	. .venv/bin/activate && pip install -r requirements.txt -r requirements-dev.txt -e .

guake/main.py

@@ -244,6 +244,28 @@ def main():
         help=_('Do not execute the start up script')
     )
 
+    # checking mandatory dependencies
+    import gi
+
+    try:
+        gi.require_version('Gtk', '3.0')
+        gi.require_version('Gdk', '3.0')
+    except ValueError:
+        print("[ERROR] Unable to start Guake, missing mandatory dependency: GtK 3.0")
+        sys.exit(1)
+
+    try:
+        gi.require_version('Vte', '2.91')  # vte-0.42
+    except ValueError:
+        print("[ERROR] Unable to start Guake, missing mandatory dependency: Vte >= 0.42")
+        sys.exit(1)
+
+    try:
+        gi.require_version('Keybinder', '3.0')
+    except ValueError:
+        print("[ERROR] Unable to start Guake, missing mandatory dependency: Keybinder 3")
+        sys.exit(1)
+
     options = parser.parse_args()[0]
     if options.version:
         from guake import gtk_version