Safety checks for required apps.

builddefs/docs/sidebars.js

@@ -251,9 +251,9 @@ const sidebars = {
                             type: 'category',
                             label: "Past Breaking Changes",
                             link: {
-                              type: 'generated-index',
-                              title: 'Past Breaking Changes',
-                              slug: '/breaking_changes/all',
+                                type: 'generated-index',
+                                title: 'Past Breaking Changes',
+                                slug: '/breaking_changes/all',
                             },
                             items: [
                                 {

lib/python/qmk/cli/docs.py

@@ -1,5 +1,6 @@
 """Serve QMK documentation locally
 """
+import shutil
 from qmk.docs import prepare_docs_build_area, run_docs_command
 
 from milc import cli
@@ -9,5 +10,14 @@ from milc import cli
 def docs(cli):
     """Spin up a local HTTP server for the QMK docs.
     """
+
+    if not shutil.which('doxygen'):
+        cli.log.error('doxygen is not installed. Please install it and try again.')
+        return
+
+    if not shutil.which('npm'):
+        cli.log.error('npm is not installed. Please install it and try again.')
+        return
+
     prepare_docs_build_area()
     run_docs_command('start', False)

lib/python/qmk/cli/generate/docs.py

@@ -1,5 +1,6 @@
 """Build QMK documentation locally
 """
+import shutil
 from qmk.docs import prepare_docs_build_area, run_docs_command, BUILD_DOCS_PATH
 
 from milc import cli
@@ -14,6 +15,14 @@ def generate_docs(cli):
         * [ ] Add a real build step... something static docs
     """
 
+    if not shutil.which('doxygen'):
+        cli.log.error('doxygen is not installed. Please install it and try again.')
+        return
+
+    if not shutil.which('npm'):
+        cli.log.error('npm is not installed. Please install it and try again.')
+        return
+
     prepare_docs_build_area()
 
     cli.log.info('Building docusaurus docs')