From c4f54c6aa38fdf2d4ee28e7a32d600b3166e77d7 Mon Sep 17 00:00:00 2001
From: Joe Rickerby <joerick@mac.com>
Date: Wed, 11 Mar 2020 21:55:53 +0000
Subject: [PATCH] Run each build using `docker exec`, for faster builds

---
 cibuildwheel/linux.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cibuildwheel/linux.py b/cibuildwheel/linux.py
index 8af63e12..fec6da5d 100644
--- a/cibuildwheel/linux.py
+++ b/cibuildwheel/linux.py
@@ -100,11 +100,13 @@ def build(project_dir, output_dir, test_command, before_test, test_requires, tes
                             '--name', container_name,
                             '-i',
                             '-v', '/:/host',  # ignored on CircleCI
-                            docker_image, '/bin/bash'], check=True)
+                            docker_image], check=True)
             subprocess.run(['docker', 'cp',
                             os.path.abspath(project_dir) + '/.',
                             container_name + ':/project'], check=True)
 
+            subprocess.run(['docker', 'start', container_name])
+
             for config in platform_configs:
                 if dependency_constraints:
                     constraints_file = dependency_constraints.get_for_python_version(config.version)
@@ -113,7 +115,7 @@ def build(project_dir, output_dir, test_command, before_test, test_requires, tes
                                     container_name + ':/constraints.txt'], check=True)
 
                 subprocess.run(
-                    ['docker', 'start', '-i', '-a', container_name],
+                    ['docker', 'exec', '-i', container_name, '/bin/bash'],
                     universal_newlines=True,
                     check=True,
                     input='''