From 90a14b9dd29ac948f2023801bddb19d87533ef23 Mon Sep 17 00:00:00 2001
From: Pavel Savchenko <asfaltboy@gmail.com>
Date: Sat, 12 Dec 2020 21:23:27 +0000
Subject: [PATCH] fixup! Support docker qemu emulation in any linux env

---
 .github/workflows/test.yml |  5 +++--
 cibuildwheel/linux.py      | 39 +++++++++++++++++---------------------
 2 files changed, 20 insertions(+), 24 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ab4d6fa88..3c7fdb4b5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, windows-latest, macos-latest]
+        os: [ubuntu-18.04]
+        # os: [ubuntu-18.04, windows-latest, macos-latest]
         python_version: ['3.7']
     timeout-minutes: 180
     steps:
@@ -52,7 +53,7 @@ jobs:
       uses: docker/setup-qemu-action@v1
       with:
         platforms: all
-      if: runner.os == "Linux"
+      if: runner.os == 'Linux'
 
     - name: Sample build
       if: contains(steps.pr-labels.outputs.labels, ' ci-sample-build ')
diff --git a/cibuildwheel/linux.py b/cibuildwheel/linux.py
index d0f36a9d2..57e83803f 100644
--- a/cibuildwheel/linux.py
+++ b/cibuildwheel/linux.py
@@ -1,4 +1,5 @@
 import platform
+import re
 import subprocess
 import sys
 import textwrap
@@ -12,27 +13,15 @@
                    get_build_verbosity_extra_flags, prepare_command)
 
 
-def matches_platform(identifier: str) -> bool:
-    output = subprocess.check_output(['docker', '--version'])
-    print("We found support for these platforms:", output)
-    pm = platform.machine()
-    if pm == "x86_64":
-        # x86_64 machines can run i686 docker containers
-        if identifier.endswith('x86_64') or identifier.endswith('i686'):
-            return True
-    elif pm == "i686":
-        if identifier.endswith('i686'):
-            return True
-    elif pm == "aarch64":
-        if identifier.endswith('aarch64'):
-            return True
-    elif pm == "ppc64le":
-        if identifier.endswith('ppc64le'):
-            return True
-    elif pm == "s390x":
-        if identifier.endswith('s390x'):
-            return True
-    return False
+re_pattern = re.compile(r'[cp]p\d{2}-manylinux_(\w*)')
+
+
+def matches_platform(identifier: str, supported_platforms: List[str]) -> bool:
+    matched_architecture = re_pattern.search(identifier)
+    id_architecture = matched_architecture.group(1) if matched_architecture else ''
+    # x86_64 machines can run i686 docker containers
+    id_architecture = id_architecture if id_architecture == 'i686' else 'x86_64'
+    return id_architecture in supported_platforms
 
 
 class PythonConfiguration(NamedTuple):
@@ -80,8 +69,14 @@ def get_python_configurations(build_selector: BuildSelector) -> List[PythonConfi
         PythonConfiguration(version='3.8', identifier='cp38-manylinux_s390x', path_str='/opt/python/cp38-cp38'),
         PythonConfiguration(version='3.9', identifier='cp39-manylinux_s390x', path_str='/opt/python/cp39-cp39'),
     ]
+
     # skip builds as required
-    return [c for c in python_configurations if matches_platform(c.identifier) and build_selector(c.identifier)]
+    target_archs = [platform.machine()]
+    return [
+        c for c in python_configurations
+        if matches_platform(c.identifier, target_archs)
+        and build_selector(c.identifier)
+    ]
 
 
 def build(options: BuildOptions) -> None: