[seahorse/wip/nielsdg/sanitize-gpgme-versino] build-aux: Don't crash on unsanitary versions

[Niels De Graef <nielsdg src gnome org>]

commit 6c1c43c010ba340261a8665466ac206948d3cc3f
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Mon Sep 30 17:57:37 2019 +0200

    build-aux: Don't crash on unsanitary versions
    
    Don't fail on versions that have some extra stuff, like "1.13.1-unknown"
    
    https://gitlab.gnome.org/GNOME/seahorse/issues/244

 build-aux/gpg_check_version.py | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)
---
diff --git a/build-aux/gpg_check_version.py b/build-aux/gpg_check_version.py
index 54d38717..6d32046a 100755
--- a/build-aux/gpg_check_version.py
+++ b/build-aux/gpg_check_version.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import re
 import sys
 import subprocess
 
@@ -13,12 +14,23 @@ def parse_version(gpg_output):
 # For GPG, this means that the major and minor version should be equal;
 # for GPGME, this means only the major version should be equal.
 def check_version(gpg_version, accepted_version, is_gpgme = False):
-    gpg_major, gpg_minor, gpg_micro = gpg_version.split('.', 2)
     acc_major, acc_minor, acc_micro = accepted_version.split('.', 2)
+
+    # The GPG(ME) version we got still might have to be sanitized
+    # For example, sometimes it adds a "-unknown" suffix
+    gpg_major_str, gpg_minor_str, gpg_micro_str = gpg_version.split('.', 2)
+
+    gpg_major = int(gpg_major_str)
+    gpg_minor = int(gpg_minor_str)
+
+    # Get rid of any fuzz that comes after the version
+    _micro_match = re.match(r'^([0-9]+)[^0-9]*', gpg_micro_str)
+    gpg_micro = int(_micro_match.group(1)) if _micro_match != None else 0
+
     if is_gpgme:
-        return int(gpg_major) == int(acc_major) and int(gpg_minor) >= int(acc_minor) and int(gpg_micro) >= 
int(acc_micro)
-    else:
-        return int(gpg_major) == int(acc_major) and int(gpg_minor) == int(acc_minor) and int(gpg_micro) >= 
int(acc_micro)
+        return gpg_major == int(acc_major) and gpg_minor >= int(acc_minor) and gpg_micro >= int(acc_micro)
+
+    return gpg_major == int(acc_major) and gpg_minor == int(acc_minor) and gpg_micro >= int(acc_micro)
 
 if len(sys.argv) <= 3:
     sys.exit(1)