Move bootstrap.pl to Python.

This also moves env var control back into the local build, so we don't
have to restart buildbot to change that.

support/buildbot/bootstrap.py

@@ -0,0 +1,105 @@
+# vim: set sw=4 sts=4 ts=4 sw=99 et:
+from contextlib import contextmanager
+import argparse
+import json
+import os
+import platform
+import shutil
+import subprocess
+
+@contextmanager
+def Chdir(path):
+    old = os.getcwd()
+    os.chdir(path)
+    print('> cd {} # {}'.format(path, os.getcwd()))
+    try:
+        yield
+    finally:
+        os.chdir(old)
+
+def run_shell(argv, env = None):
+    if type(argv) is str:
+        print('> {}'.format(argv))
+        shell = True
+    else:
+        print('> {}'.format(' '.join(argv)))
+        shell = False
+    try:
+        output = subprocess.check_output(argv, stderr = subprocess.STDOUT, env = env, shell = shell)
+    except subprocess.CalledProcessError as cpe:
+        if not shell:
+            print(cpe.output.decode('utf-8', 'ignore'))
+        raise
+    print(output.decode('utf-8', 'ignore'))
+
+def output_needs_cleaning():
+    if not os.path.isdir('OUTPUT'):
+        return False
+    amb2_dir = os.path.join('OUTPUT', '.ambuild2')
+    if not os.path.isdir(os.path.join(amb2_dir, 'graph')):
+        return True
+    if not os.path.isdir(os.path.join(amb2_dir, 'vars')):
+        return True
+    return False
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--config', type = str, required = True,
+                        help = 'Buildbot slave name')
+    parser.add_argument('--hl2sdk-root', type = str, required = True,
+                        help = 'hl2sdk collection')
+    parser.add_argument('--python-cmd', type = str, required = True,
+                        default = 'python3',
+                        help = 'Python command')
+    args = parser.parse_args()
+
+    run_shell("git submodule update --init --recursive")
+
+    source = os.getcwd()
+
+    with open(os.path.join('support', 'buildbot', 'buildconfig.json'), 'rt') as fp:
+        config_root = json.load(fp)
+
+    config = config_root.get(args.config, {})
+
+    # Set build properties.
+    build_env = os.environ.copy()
+    for env_var in ['CC', 'CXX']:
+        if env_var not in config:
+            continue
+        build_env[env_var] = config[env_var]
+
+    if platform.system() == 'Windows':
+        hl2sdk_root = '/Volumes/hgshare'
+        python_cmd = "C:\\Python38\\Python.exe"
+    elif platform.system() == 'Linux':
+        hl2sdk_root = '/hgshare'
+        python_cmd = "python3"
+    elif platform.system() == 'Windows':
+        hl2sdk_root = 'H:\\'
+        python_cmd = "python3"
+
+    config_argv = [
+        args.python_cmd,
+        os.path.join(source, 'configure.py'),
+        '--enable-optimize',
+        '--breakpad-dump',
+        '--no-color',
+        '--symbol-files',
+        '--targets=x86,x86_64',
+        '--sdks=all',
+        '--out=OUTPUT',
+        '--hl2sdk-root={}'.format(args.hl2sdk_root),
+    ]
+
+    print("Attempting to reconfigure...")
+
+    with Chdir('..'):
+        if output_needs_cleaning():
+            shutil.rmtree('OUTPUT')
+        if not os.path.isdir('OUTPUT'):
+            os.makedirs('OUTPUT')
+        run_shell(config_argv, env = build_env)
+
+if __name__ == '__main__':
+    main()

support/buildbot/buildconfig.json

@@ -0,0 +1,10 @@
+{
+    "debian8": {
+        "CC": "clang-3.8",
+        "CXX": "clang-3.8"
+    },
+    "debian11": {
+        "CC": "clang-13",
+        "CXX": "clang++-13"
+    }
+}