![]() ![]() You don't need to change any of the settings here, but just clicking "OK" will generate a file called Once TortoiseHg is installed, right-click anywhere on the desktop, select "TortoiseHg" then "Global Settings". The installation is completely straight-forward, just keep hitting "Next" until it has finished. To start with, you need to download the latest version of Pretxnchangegroup.forbid_2heads = python:forbid_2head.forbid_2headsĪttempting to push changes to the repository that will create multiple heads is now blocked.This page will guide you through the process of installing Mercurial (specifically, TortoiseHg) on a windows computer and get you ready to start using it with Codebase. Update your Mercurial nfig, adding the new hook under the 'hooks' section, like this: Step 3: Add hook to Mercurial config file Ui.warn(_('Trying to push more than one head, try run "hg merge" before it.n')) # pretxnchangegroup.forbid_2heads = python:forbid2_head.forbid_2headsĭef forbid_2heads(ui, repo, hooktype, node, **kwargs): # To forbid pushes which creates two or more headss # of the GNU General Public License, incorporated herein by reference. # This software may be used and distributed according to the terms # win32text.py - LF CRLF translation utilities for Windows users Step 2: Install forbid_2heads Python scriptĬreate a new folder named 'forbid_2head' under 'hgext' and save this file under /hgext/forbid_2head/forbid_2head.py: usr/home/mercurial/work/mercurial-1.3.1/hgext The folder name is 'hgext' and it is typically installed under Mercurial's home folder. Installing NetBeans Forbid2Heads Mercurial hook The live server always has a single development graph, containing the most recent changes. Engineers always need to retrieve (and test) the latest version, prior to being able to upload changes that may conflict with others. Server scripts are never rendered inactive by a local 'hg merge' run Linda then has to pull the recent changes, retrieving Bob's additions, merge the changes locally and then push a version that incorporates both her changes and Bob's into the server. In the example above, when Linda attempts to push the changes on Tuesday, her push will be rejected with an error message of "Trying to push more than one head, try run hg merge before it." Instead of allowing multiple heads on the live server, a much better approach is to reject multiple heads, forcing the engineers to merge changes locally, before pushing any change that will create a second head. Rejecting Multiple heads - Do the merge offline If this is a live server, your scripts will all STOP WORKING until the merge is complete and the "> other" notations are removed from the source files. This temporarily breaks the syntax of your source files for the duration of the merge. Running 'hg merge', adds "> other" comments into the source files, as part of its file-diff process. Yes you can run 'hg merge' on the live server to merge Bob and Linda's changes (the two heads) locally, but you never ever want to run hg merge on a live server. ![]() Some Mercurial plugins automatically push with -f, creating the second head on the live server repository. While TortoiseHG will often block Linda's push with a warning that it will create multiple heads, it is possible to push with -f (force). There are now two development branches - the one with Bob's changes and the one with Linda's changes, neither one having all changes in place. ![]() Since Linda doesn't have the most recent copy of index.php (with Bob's changes), her copy of index.php will create a second "head" to the project. * Linda makes a few additional changes to index.php and pushes them to the server on Tuesday morning. * Bob makes a few changes to index.php and pushes them to the server Monday afternoon. Bob and Linda each pull a copy of the repository to their local Mercurial HG. Pitfalls to watch-for with Multiple Heads * As part of a merge (generally temporary)Īt any time, you can view the head(s) of a repository with the command: hg heads Having multiple heads occurs in two cases: These changes may potentially overlap and break the application flow. Multiple heads are a case where the code repository contains changes from two (or more) developers, that haven't been merged. One of the most popular hooks is the ability to reject multiple heads. The name Mercurial uses for one of these actions is a hook (aka trigger). In some cases, you can even control Mercurial's response to those events. The Mercurial version control system offers a powerful mechanism to let you perform automated actions in response to events that occur in a repository. ![]()
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