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6e215cefe2
GIT_TRACE=true tells us which internal git command is slow. https://git-scm.com/book/en/v2/Git-Internals-Environment-Variables I got following results in my local repository. Let me confirm the bots show similar behavior. C:\src\chromium\src>set GIT_TRACE=true C:\src\chromium\src>git rebase-update 21:32:36.519698 git.c:576 trace: exec: 'git-rebase-update' 21:32:36.519698 run-command.c:626 trace: run_command: 'git-rebase-update' 21:32:38.889848 git.c:344 trace: built-in: git 'fetch' '--multiple' 'origin' 21:32:38.893846 run-command.c:626 trace: run_command: 'fetch' '--append' 'origin' Fetching origin 21:32:38.911858 git.c:344 trace: built-in: git 'fetch' '--append' 'origin' 21:32:38.983909 run-command.c:626 trace: run_command: 'remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:32:39.002923 git.c:576 trace: exec: 'git-remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:32:39.003923 run-command.c:626 trace: run_command: 'git-remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:32:43.782266 run-command.c:626 trace: run_command: 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' 21:32:43.827301 run-command.c:626 trace: run_command: 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--include-tag' '--thin' 'https://chromium.googlesource.com/chromium/src.git/' remote: Counting objects: 74400, done remote: Finding sources: 100% (19/19) 21:35:49.348951 run-command.c:626 trace: run_command: 'unpack-objects' '--pack_header=2,19' 21:35:49.368985 git.c:344 trace: built-in: git 'unpack-objects' '--pack_header=2,19' remote: Total 19 (delta 1), reused 18 (delta 1) Unpacking objects: 100% (19/19), done. 21:35:49.597328 run-command.c:626 trace: run_command: 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' 21:35:49.612375 git.c:344 trace: built-in: git 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' From https://chromium.googlesource.com/chromium/src e8994685157b..fd56d3ad0528 master -> origin/master 21:35:50.281845 run-command.c:1452 run_processes_parallel: preparing to run up to 1 tasks 21:35:50.287848 run-command.c:1484 run_processes_parallel: done 21:35:50.309865 run-command.c:626 trace: run_command: 'gc' '--auto' 21:35:50.328880 git.c:344 trace: built-in: git 'gc' '--auto' 21:35:50.453967 run-command.c:1452 run_processes_parallel: preparing to run up to 1 tasks 21:35:50.460971 run-command.c:1484 run_processes_parallel: done 21:35:50.460971 run-command.c:626 trace: run_command: 'gc' '--auto' 21:35:50.480985 git.c:344 trace: built-in: git 'gc' '--auto' Rebasing: direct_goma Rebasing: python_pool C:\src\chromium\src>git fetch 21:36:23.409703 git.c:344 trace: built-in: git 'fetch' 21:36:23.486758 run-command.c:626 trace: run_command: 'remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:36:23.506772 git.c:576 trace: exec: 'git-remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:36:23.506772 run-command.c:626 trace: run_command: 'git-remote-https' 'origin' 'https://chromium.googlesource.com/chromium/src.git' 21:36:28.542596 run-command.c:626 trace: run_command: 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' 21:36:28.578620 run-command.c:626 trace: run_command: 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--include-tag' '--thin' 'https://chromium.googlesource.com/chromium/src.git/' 21:36:28.601635 git.c:344 trace: built-in: git 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--include-tag' '--thin' 'https://chromium.googlesource.com/chromium/src.git/' remote: Counting objects: 67598, done remote: Finding sources: 100% (28/28) 21:39:29.787441 run-command.c:626 trace: run_command: 'unpack-objects' '--pack_header=2,28' 21:39:29.812462 git.c:344 trace: built-in: git 'unpack-objects' '--pack_header=2,28' remote: Total 28 (delta 2), reused 20 (delta 2) Unpacking objects: 100% (28/28), done. 21:39:30.083690 run-command.c:626 trace: run_command: 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' 21:39:30.108704 git.c:344 trace: built-in: git 'rev-list' '--objects' '--stdin' '--not' '--all' '--quiet' From https://chromium.googlesource.com/chromium/src fd56d3ad0528..fbcc09282dc8 master -> origin/master 21:39:30.788186 run-command.c:1452 run_processes_parallel: preparing to run up to 1 tasks 21:39:30.795191 run-command.c:1484 run_processes_parallel: done 21:39:30.813200 run-command.c:626 trace: run_command: 'gc' '--auto' 21:39:30.836212 git.c:344 trace: built-in: git 'gc' '--auto' Bug:749709 Change-Id: I5b94549c42271885365c2354dc3f58399d6aebe0 Reviewed-on: https://chromium-review.googlesource.com/786691 Reviewed-by: Ryan Tseng <hinoka@chromium.org> Commit-Queue: Takuto Ikuta <tikuta@google.com> |
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README.md
depot_tools
Tools for working with Chromium development. It requires python 2.7.
Tools
The most important tools are:
fetch: Agclientwrapper to checkout a project. Usefetch --helpfor more details.gclient: A meta-checkout tool. Think repo or git submodules, except that it support OS-specific rules, e.g. do not checkout Windows only dependencies when checking out for Android. Usegclient helpfor more details and README.gclient.md.git cl: A code review tool to interact with Rietveld or Gerrit. Usegit cl helpfor more details and README.git-cl.md.roll-dep: A gclient dependency management tool to submit a dep roll, updating a dependency to a newer revision.
There are a lot of git utilities included.
Updating
depot_tools updates itself automatically when running gclient tool. To
disable auto update, set the environment variable DEPOT_TOOLS_UPDATE=0.
To update package manually, run update_depot_tools.bat on Windows,
or ./update_depot_tools on Linux or Mac.
On Windows only, running gclient will install git and python.
Contributing
To contribute change for review:
git new-branch <somename>
# Hack
git add .
git commit -a -m "Fixes goat teleporting"
# find reviewers
git cl owners
git log -- <yourfiles>
# Request a review.
git cl upload -r reviewer1@chromium.org,reviewer2@chromium.org --send-mail
# Edit change description if needed.
git cl desc
# If change is approved, flag it to be committed.
git cl set-commit
# If change needs more work.
git rebase-update
...
git cl upload -t "Fixes goat teleporter destination to be Australia"
See also open bugs, open reviews, forum or report problems.
cpplint.py
To update cpplint.py, please submit the change upstream first at https://github.com/google/styleguide/tree/gh-pages/cpplint then copy it down.