[library-web] deal with tarballs containing both autotools and meson

[Frederic Peters <fpeters src gnome org>]

commit 154cdcef6105c8cbc32e3cc0ae4bbb81ed88406f
Author: Frédéric Péters <fpeters 0d be>
Date:   Sat Jan 13 20:16:46 2018 +0100

    deal with tarballs containing both autotools and meson

 src/lgo.py |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/src/lgo.py b/src/lgo.py
index b2f11a6..b26d10f 100755
--- a/src/lgo.py
+++ b/src/lgo.py
@@ -697,9 +697,11 @@ class Lgo(App):
 
         extraction_happened = False
         regex_gdu = re.compile(r'include.*gnome-doc-utils.make', re.DOTALL)
+        found_meson = False
+        found_autotools = False
         for tarinfo in tar:
             doc = None
-            if os.path.split(tarinfo.name)[-1] in ('Makefile.am', 'GNUmakefile.am'):
+            if os.path.split(tarinfo.name)[-1] in ('Makefile.am', 'GNUmakefile.am') and not found_meson:
                 fd = tar.extractfile(tarinfo)
                 makefile_am = fd.read()
                 # merge lines continued with \
@@ -745,13 +747,19 @@ class Lgo(App):
                     logging.debug('skipping because it has $( in its modulename')
                     continue
 
-            elif os.path.split(tarinfo.name)[-1] == 'meson.build':
+                found_autotools = True
+
+            elif os.path.split(tarinfo.name)[-1] == 'meson.build' and not found_autotools:
                 fd = tar.extractfile(tarinfo)
                 meson_build = fd.read()
                 if 'gnome.gtkdoc' in meson_build:
                     logging.debug('found usage of gtk-doc in %s' % tarinfo.name)
                     doc = GtkDocModule.create_from_tar(tar, tarinfo,
                             meson_build=meson_build, nightly=nightly)
+                else:
+                    continue
+
+                found_meson = True
 
             else:
                 for more_doc in more_tarball_docs[:]: