1 files changed, 69 insertions, 0 deletions
diff --git a/tools/build.py b/tools/build.py
new file mode 100755
index 000000000..fb061eae3
--- /dev/null
+++ b/tools/build.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+# Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import argparse
+import os
+import sys
+from os.path import join
+from util import run
+import distutils.spawn
+
+parser = argparse.ArgumentParser(description='')
+parser.add_argument(
+    '--build_path', default='', help='Directory to build into.')
+parser.add_argument(
+    '--args', default='', help='Specifies build arguments overrides.')
+parser.add_argument(
+    '--mode', default='debug', help='Build configuration: debug, release.')
+options, targets = parser.parse_known_args()
+
+root_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+third_party_path = join(root_path, "third_party")
+depot_tools_path = join(third_party_path, "depot_tools")
+gn_path = join(depot_tools_path, "gn")
+ninja_path = join(depot_tools_path, "ninja")
+
+# Add third_party/depot_tools to PATH  because some google tools (e.g.
+# tool_wrapper, download_from_google_storage) use some google specific python
+# wrapper.
+os.environ["PATH"] = depot_tools_path + os.pathsep + os.environ["PATH"]
+
+os.chdir(root_path)
+
+if options.build_path:
+    build_path = options.build_path
+else:
+    build_path = join(root_path, "out", options.mode)
+
+gn_args = []
+if options.args:
+    gn_args += options.args.split()
+
+if options.mode == "release":
+    gn_args += ["is_official_build=true"]
+elif options.mode == "debug":
+    pass
+else:
+    print "Bad mode {}. Use 'release' or 'debug' (default)" % options.mode
+    sys.exit(1)
+
+# Check if ccache is in the path, and if so we cc_wrapper.
+ccache_path = distutils.spawn.find_executable("ccache")
+if ccache_path:
+    gn_args += [r'cc_wrapper="%s"' % ccache_path]
+
+# mkdir $build_path. We do this so we can write args.gn before running gn gen.
+if not os.path.isdir(build_path):
+    os.makedirs(build_path)
+
+# Rather than using gn gen --args we manually write the args.gn override file.
+# This is to avoid quoting/escaping complications when passing overrides as
+# command-line arguments.
+args_filename = join(build_path, "args.gn")
+if not os.path.exists(args_filename) or options.args:
+    with open(args_filename, "w+") as f:
+        f.write("\n".join(gn_args) + "\n")
+
+run([gn_path, "gen", build_path])
+
+target = " ".join(targets) if targets else ":all"
+run([ninja_path, "-C", build_path, target])