It should be easy to build older Chromium (the browser upon which Google Chrome is based) releases but in fact it is not. More often than not, at least on Linux which is where I build Chromium, the build fails in multiple places. For example, try building the 13.0.782.218 release which is a fairly recent release. It falls over in several places, the first being in the source for the OTS tool.
This simply should not occur in any major software project and particularly projects such as Chromium. You should be able to build an exact copy of a particular release of a software product at any time in the future after the release.
Looking under the hood, Chromium is made up of a large number of repositories and a DEPS file is used to specify the particular versions of each repository to be used for each Chromium release. For example, here is the DEPS file for the 13.0.782.218 release of Chromium.
#
# To use this DEPS file to re-create a Chromium release you
# need the tools from http://dev.chromium.org installed.
#
# This DEPS file corresponds to Chromium 13.0.782.218
#
#
#
deps_os = {
'win': {
'src/third_party/yasm/binaries':
'/trunk/deps/third_party/yasm/binaries@74228',
'src/rlz':
'http://rlz.googlecode.com/svn/trunk@35',
'src/chrome_frame/tools/test/reference_build/chrome':
'/trunk/deps/reference_builds/chrome@70122',
'src/third_party/cygwin':
'/trunk/deps/third_party/cygwin@66844',
'src/third_party/python_26':
'/trunk/tools/third_party/python_26@70627',
'src/third_party/swig/win':
'/trunk/deps/third_party/swig/win@69281',
'src/third_party/xulrunner-sdk':
'/trunk/deps/third_party/xulrunner-sdk@71609',
'src/third_party/ffmpeg/binaries/chromium/win/ia32':
'/trunk/deps/third_party/ffmpeg/binaries/win@83815',
'src/third_party/psyco_win32':
'/trunk/deps/third_party/psyco_win32@79861',
'src/third_party/lighttpd':
'/trunk/deps/third_party/lighttpd@33727',
'src/third_party/mingw-w64/mingw/bin':
'http://src.chromium.org/native_client/trunk/src/third_party/mingw-w64/mingw/bin@5308',
'src/third_party/pefile':
'http://pefile.googlecode.com/svn/trunk@63',
'src/chrome/tools/test/reference_build/chrome':
'/trunk/deps/reference_builds/chrome@70122',
'src/third_party/nss':
'/trunk/deps/third_party/nss@83672',
},
'mac': {
'src/third_party/WebKit/WebKitLibraries':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/WebKitLibraries@93192',
'src/third_party/GTM':
'http://google-toolbox-for-mac.googlecode.com/svn/trunk@440',
'src/third_party/pdfsqueeze':
'http://pdfsqueeze.googlecode.com/svn/trunk@4',
'src/chrome/installer/mac/third_party/xz/xz':
'/trunk/deps/third_party/xz@50504',
'src/third_party/swig/mac':
'/trunk/deps/third_party/swig/mac@69281',
'src/chrome/tools/test/reference_build/chrome_mac':
'/trunk/deps/reference_builds/chrome_mac@71120',
'src/third_party/lighttpd':
'/trunk/deps/third_party/lighttpd@33737',
'src/third_party/nss':
'/trunk/deps/third_party/nss@83672',
},
'unix': {
'src/third_party/xdg-utils':
'/trunk/deps/third_party/xdg-utils@84895',
'src/third_party/openssl':
'/trunk/deps/third_party/openssl@69192',
'src/chrome/tools/test/reference_build/chrome_linux':
'/trunk/deps/reference_builds/chrome_linux@70120',
'src/third_party/swig/linux':
'/trunk/deps/third_party/swig/linux@69281',
'src/third_party/cros':
'http://git.chromium.org/git/cros.git@27e31209',
'src/third_party/WebKit/Tools/gdb':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/Tools/gdb@93192',
'src/third_party/lss':
'http://linux-syscall-support.googlecode.com/svn/trunk/lss@3',
},
}
deps = {
'src/third_party/skia/include':
'http://skia.googlecode.com/svn/branches/chrome/782a/trunk/include@1536',
'src/third_party/flac':
'/trunk/deps/third_party/flac@75901',
'src/chrome/test/data/layout_tests/LayoutTests/fast/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/fast/workers@93192',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/xmlhttprequest':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/xmlhttprequest@93192',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium/fast/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium/fast/workers@93192',
'src/third_party/webdriver/python/selenium/test':
'http://selenium.googlecode.com/svn/trunk/py/test@12107',
'src/chrome/test/data/layout_tests/LayoutTests/fast/js/resources':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/fast/js/resources@93192',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-mac/http/tests/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-mac/http/tests/workers@93192',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/resources':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/resources@93192',
'src/third_party/skia/gpu':
'http://skia.googlecode.com/svn/branches/chrome/782a/trunk/gpu@1552',
'src/chrome/test/data/layout_tests/LayoutTests/storage/domstorage':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/storage/domstorage@93192',
'src/third_party/safe_browsing/testing':
'http://google-safe-browsing.googlecode.com/svn/trunk/testing@106',
'src/third_party/WebKit':
'/trunk/deps/third_party/WebKit@76115',
'src/chrome/test/data/layout_tests/LayoutTests/fast/events':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/fast/events@93192',
'src/third_party/bidichecker':
'http://bidichecker.googlecode.com/svn/trunk/lib@4',
'src/third_party/ots':
'http://ots.googlecode.com/svn/trunk@66',
'src/third_party/pylib':
'http://src.chromium.org/native_client/trunk/src/third_party/pylib@5308',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/workers@93192',
'src/testing/gmock':
'http://googlemock.googlecode.com/svn/trunk@374',
'src/chrome/test/data/extensions/api_test/permissions/nacl_enabled/bin':
'http://src.chromium.org/native_client/trunk/src/native_client/tests/prebuilt@5493',
'src/native_client':
'http://src.chromium.org/native_client/trunk/src/native_client@5493',
'src/chrome/test/data/layout_tests/LayoutTests/fast/filesystem/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/fast/filesystem/workers@93192',
'src/sdch/open-vcdiff':
'http://open-vcdiff.googlecode.com/svn/trunk@28',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-win/storage/domstorage':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-win/storage/domstorage@93192',
'src/tools/page_cycler/acid3':
'/trunk/deps/page_cycler/acid3@19546',
'src/chrome/test/data/layout_tests/LayoutTests/fast/filesystem/resources':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/fast/filesystem/resources@93192',
'src/build/util/support':
'/trunk/deps/support@20411',
'src/third_party/libjingle/source':
'http://libjingle.googlecode.com/svn/trunk@63',
'src':
'/branches/782_215/src@98754',
'src/third_party/WebKit/Tools/DumpRenderTree':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/Tools/DumpRenderTree@93192',
'src/third_party/hunspell':
'/trunk/deps/third_party/hunspell@65351',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/appcache':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/appcache@93192',
'src/testing/gtest':
'http://googletest.googlecode.com/svn/trunk@560',
'src/v8':
'http://v8.googlecode.com/svn/branches/3.3@8925',
'src/third_party/libvpx':
'/trunk/deps/third_party/libvpx@81610',
'src/breakpad/src':
'http://google-breakpad.googlecode.com/svn/trunk/src@786',
'chromeos':
'/trunk/src/tools/cros.DEPS@87450',
'src/googleurl':
'http://google-url.googlecode.com/svn/trunk@155',
'src/third_party/hunspell_dictionaries':
'/trunk/deps/third_party/hunspell_dictionaries@79099',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-win/fast/events':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-win/fast/events@93192',
'src/third_party/leveldb':
'http://leveldb.googlecode.com/svn/trunk@29',
'src/third_party/scons-2.0.1':
'http://src.chromium.org/native_client/trunk/src/third_party/scons-2.0.1@5308',
'src/third_party/webdriver/python/selenium':
'http://selenium.googlecode.com/svn/trunk/py/selenium@12107',
'src/third_party/WebKit/Source':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/Source@93192',
'src/third_party/WebKit/LayoutTests':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests@93192',
'src/third_party/snappy/src':
'http://snappy.googlecode.com/svn/trunk@37',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/websocket/tests':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/websocket/tests@93192',
'src/chrome/test/data/layout_tests/LayoutTests/media':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/media@93192',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-mac/fast/events':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-mac/fast/events@93192',
'src/third_party/libjpeg_turbo':
'/trunk/deps/third_party/libjpeg_turbo@83675',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-mac/storage/domstorage':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-mac/storage/domstorage@93192',
'src/tools/gyp':
'http://gyp.googlecode.com/svn/trunk@930',
'src/third_party/skia/src':
'http://skia.googlecode.com/svn/branches/chrome/782a/trunk/src@1895',
'src/third_party/ffmpeg':
'/trunk/deps/third_party/ffmpeg/source@83815',
'src/third_party/cacheinvalidation/files/src/google':
'http://google-cache-invalidation-api.googlecode.com/svn/trunk/src/google@80',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-win/fast/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-win/fast/workers@93192',
'src/third_party/WebKit/Tools/Scripts':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/Tools/Scripts@93192',
'src/chrome/test/data/layout_tests/LayoutTests/http/tests/filesystem':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/http/tests/filesystem@93192',
'src/third_party/icu':
'/trunk/deps/third_party/icu46@90787',
'src/third_party/speex':
'/trunk/deps/third_party/speex@83190',
'src/seccompsandbox':
'http://seccompsandbox.googlecode.com/svn/trunk@153',
'src/third_party/yasm/source/patched-yasm':
'/trunk/deps/third_party/yasm/patched-yasm@73761',
'src/chrome/test/data/layout_tests/LayoutTests/platform/chromium-win/http/tests/workers':
'http://svn.webkit.org/repository/webkit/branches/chromium/782/LayoutTests/platform/chromium-win/http/tests/workers@93192',
'src/third_party/angle':
'http://angleproject.googlecode.com/svn/branches/chrome_m13@726',
'src/third_party/swig/Lib':
'/trunk/deps/third_party/swig/Lib@69281',
}
skip_child_includes = ['breakpad', 'chrome_frame', 'native_client', 'o3d', 'pdf', 'sdch', 'skia', 'testing', 'third_party', 'v8']
hooks = [{'action': ['python', 'src/build/gyp_chromium'], 'pattern': '.'}, {'action': ['python', 'src/build/download_nacl_irt.py', '--nacl_revision', '5493', '--file_hash', 'x86_32', '6aff4ea5ebdf9d57bd2e01caa662efd58d6bae18', '--file_hash', 'x86_64', '88deae19ead39075214964fc1511ce0e1f3a0fe9'], 'pattern': '.'}]
include_rules = ['+base', '+build', '+ipc', '+unicode', '+testing']
If anybody knows why the DEBS file for a particular release can change after the release is made, I sure would like to know.
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