Move toolchain update control into src, but keep download logic in depot_tools

Moves the update functionality out of update_depot_tools into src/ in https://codereview.chromium.org/175573004 .

get_toolchain_if_required.py now expects a list of hashes on the
command line, and makes sure that it gets one of those.

toolchain2013.py saves a .json which contains information relevant to the
interests of the caller, so that it can set up the parent environment. This
is returned via the --output-json command line argument to get_...py

R=iannucci@chromium.org
BUG=323300

Review URL: https://codereview.chromium.org/168603004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@252725 0039d316-1c4b-4281-b951-d872f2087c98

update_depot_tools.bat

@@ -30,13 +30,6 @@ if errorlevel 1 goto :EOF
 :: Now clear errorlevel so it can be set by other programs later.
 set errorlevel=
 
-:: Opt-in for now.
-IF "%DEPOT_TOOLS_WIN_TOOLCHAIN%" == "" GOTO :NOTOOLCHAIN
-call python %~dp0win_toolchain\get_toolchain_if_necessary.py
-if errorlevel 1 goto :EOF
-set errorlevel=
-:NOTOOLCHAIN
-
 :: Shall skip automatic update?
 IF "%DEPOT_TOOLS_UPDATE%" == "0" GOTO :EOF
 
@@ -74,4 +67,4 @@ goto :EOF
 :GIT_SVN_UPDATE
 cd /d "%DEPOT_TOOLS_DIR%."
 call git svn rebase -q -q
-goto :EOF
+goto :EOF

win_toolchain/get_toolchain_if_necessary.py

@@ -29,7 +29,9 @@ maintained, and a new 2015 script would be added.
 import ctypes.wintypes
 import hashlib
 import json
+import optparse
 import os
+import shutil
 import subprocess
 import sys
 import time
@@ -145,9 +147,12 @@ def main():
   if not sys.platform.startswith(('cygwin', 'win32')):
     return 0
 
-  if len(sys.argv) != 1:
-    print >> sys.stderr, 'Unexpected arguments.'
-    return 1
+  parser = optparse.OptionParser(description=sys.modules[__name__].__doc__)
+  parser.add_option('--output-json', metavar='FILE',
+                    help='write information about toolchain to FILE')
+  options, args = parser.parse_args()
+
+  desired_hashes = set(args)
 
   # Move to depot_tools\win_toolchain where we'll store our files, and where
   # the downloader script is.
@@ -155,12 +160,6 @@ def main():
   toolchain_dir = '.'
   target_dir = os.path.normpath(os.path.join(toolchain_dir, 'vs2013_files'))
 
-  sha1path = os.path.join(toolchain_dir, 'toolchain_vs2013.hash')
-  desired_hashes = set()
-  if os.path.isfile(sha1path):
-    with open(sha1path, 'rb') as f:
-      desired_hashes = set(f.read().strip().splitlines())
-
   # If the current hash doesn't match what we want in the file, nuke and pave.
   # Typically this script is only run when the .sha1 one file is updated, but
   # directly calling "gclient runhooks" will also run it, so we cache
@@ -195,6 +194,9 @@ def main():
       return 1
     SaveTimestampsAndHash(target_dir, current_hash)
 
+  if options.output_json:
+    shutil.copyfile(os.path.join(target_dir, 'data.json'), options.output_json)
+
   return 0
 
 

win_toolchain/toolchain2013.py

@@ -7,6 +7,7 @@
 
 
 import ctypes
+import json
 import optparse
 import os
 import shutil
@@ -456,8 +457,18 @@ def main():
     CopyToFinalLocation(extracted, target_dir)
 
     GenerateSetEnvCmd(target_dir, not options.express)
-    with open(os.path.join(target_dir, '.version'), 'w') as f:
-      f.write('express' if options.express else 'pro')
+    data = {
+        'path': target_dir,
+        'version': '2013e' if options.express else '2013',
+        'win8sdk': os.path.join(target_dir, 'win8sdk'),
+        'wdk': os.path.join(target_dir, 'wdk'),
+        'runtime_dirs': [
+          os.path.join(target_dir, 'sys64'),
+          os.path.join(target_dir, 'sys32'),
+        ],
+    }
+    with open(os.path.join(target_dir, 'data.json'), 'w') as f:
+      json.dump(data, f)
   finally:
     if options.clean:
       DeleteAllTempDirs()

win_toolchain/toolchain_vs2013.hash

@@ -1,2 +0,0 @@
-0bbca7f56298c3075b183cd9d11b3529c88ce775
-9d48ee27f0d29e02fd89dd5d1d6208bf42fd6e16