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# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
import os.path
import re
def GetNinjaOutputDirectory(chrome_root, configuration=None):
"""Returns <chrome_root>/<output_dir>/(Release|Debug).
The output_dir is detected in the following ways, in order of precedence:
1. CHROMIUM_OUT_DIR environment variable.
2. GYP_GENERATOR_FLAGS environment variable output_dir property.
3. Symlink target, if src/out is a symlink.
4. Most recently modified (e.g. built) directory called out or out_*.
The configuration chosen is the one most recently generated/built, but can be
overriden via the <configuration> parameter."""
output_dirs = []
if ('CHROMIUM_OUT_DIR' in os.environ and
os.path.isdir(os.path.join(chrome_root, os.environ['CHROMIUM_OUT_DIR']))):
output_dirs = [os.environ['CHROMIUM_OUT_DIR']]
if not output_dirs:
generator_flags = os.getenv('GYP_GENERATOR_FLAGS', '').split(' ')
for flag in generator_flags:
name_value = flag.split('=', 1)
if (len(name_value) == 2 and name_value[0] == 'output_dir' and
os.path.isdir(os.path.join(chrome_root, name_value[1]))):
output_dirs = [name_value[1]]
if not output_dirs:
out = os.path.join(chrome_root, 'out')
if os.path.islink(out):
out_target = os.path.join(os.path.dirname(out), os.readlink(out))
if os.path.exists(out_target):
output_dirs = [out_target]
if not output_dirs:
for f in os.listdir(chrome_root):
if (re.match('out(?:$|_)', f) and
os.path.isdir(os.path.join(chrome_root, f))):
output_dirs.append(f)
configs = [configuration] if configuration else ['Debug', 'Release']
output_paths = [os.path.join(chrome_root, out_dir, config)
for out_dir in output_dirs for config in configs]
def approx_directory_mtime(path):
if not os.path.exists(path):
return -1
# This is a heuristic; don't recurse into subdirectories.
paths = [path] + [os.path.join(path, f) for f in os.listdir(path)]
return max(os.path.getmtime(p) for p in paths)
return max(output_paths, key=approx_directory_mtime)
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