meld: fix build with python3.8

3 files changed, 55 insertions, 3 deletions

diff --git a/devel/meld/Makefile b/devel/meld/Makefile
index d83c6b21df4..295ade2c456 100644
--- a/devel/meld/Makefile
+++ b/devel/meld/Makefile
@@ -1,7 +1,7 @@
-# $NetBSD: Makefile,v 1.95 2019/07/21 22:24:38 wiz Exp $
+# $NetBSD: Makefile,v 1.96 2019/12/22 20:40:50 markd Exp $
 
 DISTNAME=		meld-3.20.1
-PKGREVISION=		2
+PKGREVISION=		3
 CATEGORIES=		devel
 MASTER_SITES=		${MASTER_SITE_GNOME:=sources/meld/${PKGVERSION_NOREV:R}/}
 EXTRACT_SUFX=		.tar.xz
@@ -12,6 +12,7 @@ COMMENT=		Visual diff and merge tool (GTK3 version)
 LICENSE=		gnu-gpl-v2
 
 BUILD_DEPENDS+=		itstool-[0-9]*:../../textproc/itstool
+BUILD_DEPENDS+=		${PYPKGPREFIX}-distro-[0-9]*:../../devel/py-distro
 DEPENDS+=		${PYPKGPREFIX}-gobject3>=3.8:../../devel/py-gobject3
 DEPENDS+=		gsettings-desktop-schemas-[0-9]*:../../sysutils/gsettings-desktop-schemas
 DEPENDS+=		dconf-[0-9]*:../../devel/dconf
diff --git a/devel/meld/distinfo b/devel/meld/distinfo
index 4945fdca46c..fd6420ab444 100644
--- a/devel/meld/distinfo
+++ b/devel/meld/distinfo
@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.58 2019/04/04 10:02:23 wiz Exp $
+$NetBSD: distinfo,v 1.59 2019/12/22 20:40:50 markd Exp $
 
 SHA1 (meld-3.20.1.tar.xz) = f2cf7e9b3a9f7a5fb9553e3ab262a8984e6bbb90
 RMD160 (meld-3.20.1.tar.xz) = 6e9bddbb0a99536f4bae04bd31109f0ea50af39a
 SHA512 (meld-3.20.1.tar.xz) = cd21f298dc1da6eb08261599b9270989c837e0923d5cf5cfdad227dd7f256ac5f53ac903939ebef90ea6cd684c7355ce9482648057284f4ce44f1c7101959c1f
 Size (meld-3.20.1.tar.xz) = 594812 bytes
+SHA1 (patch-meld_build_helpers.py) = a2b572c15acda866173bdb09366e72b05d5fc48f
diff --git a/devel/meld/patches/patch-meld_build_helpers.py b/devel/meld/patches/patch-meld_build_helpers.py
new file mode 100644
index 00000000000..972ee237b11
--- /dev/null
+++ b/devel/meld/patches/patch-meld_build_helpers.py
@@ -0,0 +1,50 @@
+$NetBSD: patch-meld_build_helpers.py,v 1.1 2019/12/22 20:40:51 markd Exp $
+
+commit 7862ee014ecb85b2a7fe409f8b147b1ddb6e657e
+Update build helpers for Python 3.8 compatibility
+
+--- meld/build_helpers.py.orig	2019-03-30 21:54:28.000000000 +0000
++++ 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'
+@@ -378,11 +387,21 @@ class install(distutils.command.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)
+