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epriestley 2d7224f0e3 Add an experimental "--mergeup" flag to use a less volatile merge strategy in "arc land" 
Summary:
See chatlog from https://secure.phabricator.com/chatlog/channel/%23phabricator/?at=37257

Basically, the install's developers sometimes use "git merge master" instead of "git rebase master" to pull changes from master into their branch. When we run "git rebase master" at the end, this creates a lot of conflicts.

Instead, optionally run "git merge master". This should be equivalent in our case (where we always rebase) and much better in their case (where they sometimes merge).

We're both going to use it for a bit and see if it creates problems. If it improves the "sometimes-merge" workflow without affecting the "always rebase" workflow, we can make it a default. If it improves theirs but damages ours, we can keep it a flag/option. If it's just terrible, we can figure out something else.

Test Plan:
Ran `arc land --mergeup --trace <feature> --keep-branch --hold`, see P624 for output. Observed merge update strategy and general success.

Also verified the conflict:

  $ arc land --mergeup --merge
  Usage Exception: Arguments '--mergeup' and '--merge' are mutually exclusive: The --merge strategy does not update the feature branch.

Reviewers: btrahan, vrana, DurhamGoode

Reviewed By: btrahan

CC: aran, keir

Differential Revision: https://secure.phabricator.com/D4080
2012-12-13 14:11:52 -08:00
bin Make bin/arc less linux-centered, more UNIX-agnostic 2012-07-03 06:34:49 -07:00
externals Allow arcanist to search for libphutil in externals/includes/ 2012-08-10 14:58:19 -07:00
resources Delete license headers from files 2012-11-05 11:16:24 -08:00
scripts Parse "--help" correctly in arc 2012-11-22 08:36:28 -08:00
src Add an experimental "--mergeup" flag to use a less volatile merge strategy in "arc land" 2012-12-13 14:11:52 -08:00
.arcconfig Delete license headers from files 2012-11-05 11:16:24 -08:00
.divinerconfig Make the "this is technical documentation" message of "Arcanist Overview" more clear 2012-08-10 11:37:30 -07:00
.editorconfig Specify config for text editors 2012-11-03 00:13:53 -07:00
.gitignore Allow arcanist to search for libphutil in externals/includes/ 2012-08-10 14:58:19 -07:00
LICENSE Delete license headers from files 2012-11-05 11:16:24 -08:00
NOTICE Delete license headers from files 2012-11-05 11:16:24 -08:00
README Delete license headers from files 2012-11-05 11:16:24 -08:00

README 

WHAT IS ARCANIST?

Arcanist is the command-line tool for Phabricator. It allows you to interact
with Phabricator installs to send code for review, download patches, transfer
files, view status, make API calls, and various other things. You can find
a complete user guide here:

  http://www.phabricator.com/docs/phabricator/article/Arcanist_User_Guide.html

For more information about Phabricator, see:

  http://phabricator.org/

LICENSE

Arcanist is released under the Apache 2.0 license except as otherwise noted.