x11-libs/vte: use ${EPYTHON}, not python3

Closes: https://bugs.gentoo.org/787290
Signed-off-by: Matt Turner <mattst88@gentoo.org>

x11-libs/vte/files/vte-0.64.1-meson-Find-python-explicitly-to-honor-downstream-pyt.patch

@@ -0,0 +1,48 @@
+https://gitlab.gnome.org/GNOME/vte/-/issues/350
+
+From d459d32126119c8d78f8239b8b857a255e6005d7 Mon Sep 17 00:00:00 2001
+From: Matt Turner <mattst88@gmail.com>
+Date: Sat, 1 May 2021 08:31:45 -0400
+Subject: [PATCH] meson: Find python explicitly to honor downstream python
+ choice
+
+---
+ meson.build     | 1 +
+ src/meson.build | 2 ++
+ 2 files changed, 3 insertions(+)
+
+diff --git a/meson.build b/meson.build
+index 4f5a7c57..6404802f 100644
+--- a/meson.build
++++ b/meson.build
+@@ -461,6 +461,7 @@ pango_dep    = dependency('pango',      version: '>=' + pango_req_version)
+ pcre2_dep    = dependency('libpcre2-8', version: '>=' + pcre2_req_version)
+ pthreads_dep = dependency('threads')
+ zlib_dep     = dependency('zlib')
++python       = import('python').find_installation('python3')
+ 
+ if get_option('fribidi')
+   fribidi_dep = dependency('fribidi', version: '>=' + fribidi_req_version)
+diff --git a/src/meson.build b/src/meson.build
+index a1440da5..4ac6a7f2 100644
+--- a/src/meson.build
++++ b/src/meson.build
+@@ -60,6 +60,7 @@ modes_sources = files(
+ modes_sources += custom_target(
+   'modes',
+   command: [
++    python,
+     files('modes.py'),
+     '--destdir', '@OUTDIR@',
+   ],
+@@ -92,6 +93,7 @@ parser_sources = files(
+ parser_sources += custom_target(
+   'parser-seq',
+   command: [
++    python,
+     files('parser-seq.py'),
+     '--destdir', '@OUTDIR@',
+   ],
+-- 
+2.26.3
+

x11-libs/vte/vte-0.64.1.ebuild

@@ -2,10 +2,11 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
+PYTHON_COMPAT=( python3_{7..9} )
 VALA_USE_DEPEND="vapigen"
 VALA_MIN_API_VERSION="0.32"
 
-inherit gnome.org meson vala xdg
+inherit gnome.org meson python-any-r1 vala xdg
 
 DESCRIPTION="Library providing a virtual terminal emulator widget"
 HOMEPAGE="https://wiki.gnome.org/Apps/Terminal/VTE"
@@ -35,6 +36,7 @@ RDEPEND="
 "
 DEPEND="${RDEPEND}"
 BDEPEND="
+	${PYTHON_DEPS}
 	dev-libs/libxml2:2
 	dev-util/glib-utils
 	gtk-doc? ( >=dev-util/gtk-doc-1.13
@@ -45,6 +47,10 @@ BDEPEND="
 	vala? ( $(vala_depend) )
 "
 
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.64.1-meson-Find-python-explicitly-to-honor-downstream-pyt.patch
+)
+
 src_prepare() {
 	if ! use vanilla; then
 		# Part of https://src.fedoraproject.org/rpms/vte291/raw/f31/f/vte291-cntnr-precmd-preexec-scroll.patch