1 files changed, 61 insertions, 0 deletions
diff --git a/development/meld3/python-3.8.patch b/development/meld3/python-3.8.patch
new file mode 100644
index 0000000000..36ff4bcf7c
--- /dev/null
+++ b/development/meld3/python-3.8.patch
@@ -0,0 +1,61 @@
+commit 9cb590f9804a89d8914d0d7d6c89c336f6d86d86
+Author: Kai Willadsen <kai.willadsen@gmail.com>
+Date:   Mon May 6 08:15:23 2019 +1000
+
+    Update build helpers for Python 3.8 compatibility (#322)
+    
+    The `linux_distribution` helper for the platform module has been removed
+    in Python 3.8, so we need an additional helper to check for the Debian-
+    style packaging layout.
+    
+    Really this should be an `install_requires`, but moving our build
+    helpers to `setuptools` is a not-insignificant risk that I'd rather not
+    take when we're looking at moving to Meson.
+
+diff --git a/meld/build_helpers.py b/meld/build_helpers.py
+index 5977b3cd..f9fb302b 100644
+--- a/meld/build_helpers.py
++++ b/meld/build_helpers.py
+@@ -31,6 +31,15 @@ import platform
+ import sys
+ from distutils.log import info
+ 
++try:
++    import distro
++except ImportError:
++    python_version = tuple(int(x) for x in platform.python_version_tuple())
++    if python_version >= (3, 8):
++        print(
++            'Missing build requirement "distro" Python module; '
++            'install paths may be incorrect', file=sys.stderr)
++
+ 
+ def has_help(self):
+     return "build_help" in self.distribution.cmdclass and os.name != 'nt'
+@@ -404,11 +413,21 @@ class install(distutils.command.install.install):
+ 
+     def finalize_options(self):
+         special_cases = ('debian', 'ubuntu', 'linuxmint')
+-        if (platform.system() == 'Linux' and
+-                platform.linux_distribution()[0].lower() in special_cases):
+-            # Maintain an explicit install-layout, but use deb by default
+-            specified_layout = getattr(self, 'install_layout', None)
+-            self.install_layout = specified_layout or 'deb'
++        if platform.system() == 'Linux':
++            # linux_distribution has been removed in Python 3.8; we require
++            # the third-party distro package for future handling.
++            try:
++                distribution = platform.linux_distribution()[0].lower()
++            except AttributeError:
++                try:
++                    distribution = distro.id()
++                except NameError:
++                    distribution = 'unknown'
++
++            if distribution in special_cases:
++                # Maintain an explicit install-layout, but use deb by default
++                specified_layout = getattr(self, 'install_layout', None)
++                self.install_layout = specified_layout or 'deb'
+ 
+         distutils.command.install.install.finalize_options(self)
+