Split the dependencies.py file into several parts.

kiwixbuild/dependencies/gumbo.py

@@ -0,0 +1,23 @@
+from .base import (
+    Dependency,
+    ReleaseDownload,
+    MakeBuilder
+)
+
+from kiwixbuild.utils import Remotefile
+
+
+class Gumbo(Dependency):
+    name = "gumbo"
+
+    class Source(ReleaseDownload):
+        archive = Remotefile('gumbo-0.10.1.tar.gz',
+                             '28463053d44a5dfbc4b77bcf49c8cee119338ffa636cc17fc3378421d714efad',
+                             'https://github.com/google/gumbo-parser/archive/v0.10.1.tar.gz')
+
+        def _post_prepare_script(self, context):
+            context.try_skip(self.extract_path)
+            command = "./autogen.sh"
+            self.buildEnv.run_command(command, self.extract_path, context)
+
+    Builder = MakeBuilder