Setting up Gerrit: Difference between revisions

From Qt Wiki
Jump to navigation Jump to search
m (→‎Local Setup: Fix tag closing of Windows path.)
m (Setting up git hooks: use the git hooks from qtrepotools (ensures the hooks are updated automatically with `git pull` in qtrepotools))
 
(24 intermediate revisions by 18 users not shown)
Line 6: Line 6:


In order to be able to propose changes to those projects, you have to first setup your Gerrit account and get Qt's sourcecode, following the steps below:
In order to be able to propose changes to those projects, you have to first setup your Gerrit account and get Qt's sourcecode, following the steps below:
# [[#How to get started - Gerrit registration|Set up]] a Gerrit account
 
# Tweak your SSH config as instructed [[#Local Setup|here]]
#[[#How to get started - Gerrit registration|Set up]] a Gerrit account
# Use the recommended Git settings, defined [[#Configuring Git|here]]
#Tweak your SSH config as instructed [[#Local Setup|here]]
# [[#Getting the source code|Get the source code]] of the projects you want to contribute to
#Use the recommended Git settings, defined [[#Configuring Git|here]]
#[[#Getting the source code|Get the source code]] of the projects you want to contribute to
 
Moreover, if you did not use the init-repository scripts to get the source code, you will have to manually:
Moreover, if you did not use the init-repository scripts to get the source code, you will have to manually:
# [[#Setting up git hooks|Set up the git commit hooks]] .  
 
# [[#Setting_up_gerrit_git_remote|Set up]] a Gerrit git remote.
#[[#Setting up git hooks|Set up the git commit hooks]] .
#[[#Setting_up_gerrit_git_remote|Set up]] a Gerrit git remote.


Once all the steps above have been completed, you're ready to [[Qt Contribution Guidelines#Creating Changes for Inclusion Into Qt|submit your patch to Qt]]!
Once all the steps above have been completed, you're ready to [[Qt Contribution Guidelines#Creating Changes for Inclusion Into Qt|submit your patch to Qt]]!


See also:
See also:
* [[Git Introduction]]
* [[Gerrit Caveats and Hints]]


== How to get started - Gerrit registration ==
*[[Git Introduction]]
*[[Gerrit Caveats and Hints]]


# Create a [https://login.qt.io/register Qt account], if you don't have one yet.
==How to get started - Gerrit registration==
#* '''Note''': Use an all-lowercase user name. Otherwise, Gerrit will lowercase it for you, and as it is case sensitive, you will have to use mismatched login names.
Before starting make sure you have a working Git installation and OpenSSH installed. ( or the bundled version of SSH that comes with recent Git packages).
# Log into https://codereview.qt-project.org with your Qt account.
# Go to [https://codereview.qt-project.org/#/settings/contact "Settings" -> "Contact Information"], set your real name and register your email address, if it hasn't been automatically registered.
#* You will receive a confirmation email; click on the link inside to finalize your registration.
#** If you use Outlook, manually copy the link ''including any trailing equal signs'' into the browser.
#* '''Note''': The email address you use to contribute to the Qt Project will be publicly visible in the Git history. Use an alias + a custom e-mail address if you want to stay anonymous (this is discouraged)
# Review and agree to the Qt Project's contribution license agreement (CLA) in Gerrit. You need to do this only once, unless the license changes.
#* If your company has a corporate contribution agreement, ask the admin of your company's Gerrit user group to add your account to this group.
#* More details about the CLA can be found [https://www.qt.io/contributionagreement/ here].
# Go to "Settings"-> "SSH Public Keys" and upload your [https://help.github.com/articles/generating-ssh-keys public SSH Key]
# If you are behind a firewall that blocks SSH access:
## Go to "Settings" -> "HTTP Password"
## Click "Generate Password"
## Add the following line to your <tt>~/.netrc</tt> (Windows: <tt>​%USERPROFILE%\_netrc</tt>):<pre>machine codereview.qt-project.org login <Gerrit username> password <Generated password></pre>


== Local Setup ==
#Create a [https://login.qt.io/register Qt account], if you don't have one yet.
#*'''Note''': Use an all-lowercase user name. Otherwise, Gerrit will lowercase it for you, and as it is case sensitive, you will have to use mismatched login names.
#Log into https://codereview.qt-project.org with your Qt account.
#Go to [https://codereview.qt-project.org/settings/#Profile "Settings" -> "Profile"], set your real name and register your email address, if it hasn't been automatically registered.
#*You will receive a confirmation email; click on the link inside to finalize your registration.
#**If you use Outlook, manually copy the link ''including any trailing equal signs'' into the browser.
#*'''Note''': The email address you use to contribute to the Qt Project will be publicly visible in the Git history. Use an alias + a custom e-mail address if you want to stay anonymous (this is discouraged)
#Review and agree to the Qt Project's contribution license agreement (CLA) in Gerrit. You need to do this only once, unless the license changes.
#*If your company has a corporate contribution agreement, ask the admin of your company's Gerrit user group to add your account to this group.
#*More details about the CLA can be found [https://www.qt.io/contributionagreement/ here].
#Create a public SSH key for your PC, if you don't have one yet (see below under "Local Setup" for instructions)
#Go to "Settings"-> "SSH Public Keys" and upload your public SSH Key.
#If you are behind a firewall that blocks SSH access:
##Go to "Settings" -> "HTTP Password"
##Click "Generate Password"
##Add the following line to your <tt>~/.netrc</tt> (Windows: <tt>​%USERPROFILE%\_netrc</tt>):<pre>machine codereview.qt-project.org login <Gerrit username> password <Generated password></pre>
 
==Local Setup==
'''Proper configuration of SSH for your Gerrit account is necessary for the URLs in the next steps.'''
'''Proper configuration of SSH for your Gerrit account is necessary for the URLs in the next steps.'''


Additionally, adding an SSH public key to your gerrit user account can be useful for custom applications that watch Gerrit for certain events and do things such as post automated comments, pull and build commits automatically, etc...
'''Note:''' On Windows, when '''not''' using OpenSSH, the <tt>~/</tt> shorthand used below can be equated with <tt>C:\Users\%USERNAME%\</tt>. Make replacements in the example as necessary.


The instructions below are applicable to Linux (Terminal), Mac (Console), and Windows (Powershell).
Edit <tt>~/.ssh/config</tt> with host information for Gerrit, as shown below. Do not copy comments marked by #, as they may not be ignored by your SSH client.


'''Note: SSH keys are intended to be unique to each machine. New keys must be created for each additional machine logging in to Gerrit with SSH.'''
<pre>
 
Host codereview.qt-project.org
'''Note:''' On windows, the ~/ shorthand used below can be equated with <tt>C:\Users\%USERNAME%\</tt>. Make replacements in the example as necessary.
 
# Edit "~/.ssh/config" with host information for gerrit. See sample below. Do not copy comments marked by #. They may not be ignored by your OS.  <syntaxhighlight>
Host codereview.qt-project.org
    Hostname codereview.qt-project.org
     Port 29418
     Port 29418
     # this is your Gerrit username, not email, and not your PC's username. You can view this from Settings in gerrit when logged in.
     # To avoid no mutual signature algorithm errors
    PubkeyAcceptedKeyTypes +ssh-rsa
    # Use your Gerrit username, not email or your username on your own machine.
    # You can view this from Settings in gerrit when logged in.
     User yourgerritusername
     User yourgerritusername
     PreferredAuthentications publickey
     PreferredAuthentications publickey
     IdentityFile ~/.ssh/id_rsa
     IdentityFile ~/.ssh/id_ed25519
</syntaxhighlight>
</pre>
# Generate your key pairs with the ssh-keygen tool following the format below. Use Powershell in windows, Terminal in linux, or Console in Mac.  <br>ssh-keygen -t rsa -b 4096 -C youremail@email.com -f ~/.ssh/id_rsa
 
# Log into codereview.qt-project.org and navigate to Settings → SSH Public Keys
Next, you will need to ensure that you have an SSH key pair, and make it known to Gerrit.
# From the ~/.ssh directory, open the newly created id_rsa.pub file with a text editor.
 
# Copy the entire contents and paste into a new key entry in you Gerrit's SSH Public Keys page.
#If you have no key pair on this machine yet, generate one now. On the command line, invoke the following command, replacing "<tt>john-doe-win10-home"</tt> with a comment that uniquely describes the machine you're on:<br><tt>ssh-keygen -t ed25519 -C john-doe-win10-home -f ~/.ssh/id_ed25519</tt><br>'''Note: SSH keys are intended to be unique to each machine. New keys must be created for each additional machine logging in to Gerrit with SSH.'''
# Save the new entry in your Gerrit settings.
#Open the <tt>~/.ssh/id_ed25519.pub</tt> file with a text editor and copy its entire contents into the clipboard.
# You can test to verify the connection works by running: ssh codereview.qt-project.org gerrit stream-events
#Log into https://codereview.qt-project.org and navigate to <tt>Settings</tt> (the gear symbol on the top right) → <tt>SSH Keys</tt>
# If the connection is functional, every Gerrit event should be displayed in raw format to your console.
#Paste the clipboard into the <tt>New SSH key</tt> entry, and hit the <tt>ADD NEW SSH KEY</tt> button.
 
You can verify that the connection works by running:<br><tt>ssh codereview.qt-project.org</tt>
 
If the connection is functional, you should see a welcome message. End the connection by pressing <tt>Ctrl-C</tt>. If not, running <tt>ssh -v codereview.qt-project.org</tt> should give you an error message with details.
 
When making a connection to codereview.qt-project.org using ssh for the first time a prompt will show asking you to verify the authenticity (public key) of the host using it's fingerprint.<syntaxhighlight>
The authenticity of host '[codereview.qt-project.org]:29418 ([54.194.93.196]:29418)' can't be established.
ED25519 key fingerprint is SHA256:DwwqNluQyJVkOk+3bFMK6NwWYIGjMnqGP+R0k59e3CY.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])?
</syntaxhighlight>This prompt will only show the first time connecting to the host or when the host's public keys are changed. When prompted verify that the fingerprint for your key type is correct then accept the host's public key by typing yes, alternatively you could copy the fingerprint into the terminal for it to compare it to the provided fingerprint.
 
Here is a list of current fingerprints for codereview.qt-project.org<ref>https://lists.qt-project.org/pipermail/development/2022-November/043216.html</ref>:<syntaxhighlight>
ssh_host_ecdsa_384_key
384 SHA256:yMnqjnsJU0y6kfiyQQu8pYNGPFE7av5QxbeLdjTKNmk (ECDSA)
 
ssh_host_ecdsa_521_key
521 SHA256:kytLsqmLdG1KXLO/s3OxOajTYqf1+n7+YqqbOUzNbtE (ECDSA)
 
ssh_host_ecdsa_key
256 SHA256:El3+EYlXAGylCVo/Y/WYzPg7tS4fjejkepO1JVXUkb0 (ECDSA)
 
ssh_host_ed25519_key
256 SHA256:DwwqNluQyJVkOk+3bFMK6NwWYIGjMnqGP+R0k59e3CY (ED25519)
 
ssh_host_rsa_key
4096 SHA256:EPuL0PAbNuXXoye7X93ARF7/XALxA5XNAaE3p6M/L3g (RSA)
</syntaxhighlight>If the fingerprint the host provides is not included in this list, you might face an attempt for a man-in-the-middle attack or the host keys might have changed, if that happens search for the project's latest keys.


== Configuring Git ==
==Configuring Git==


We are developing in a heterogeneous environment with both Unix and Windows machines. Therefore it is imperative to have all files in the repository in the canonical LF-only format. Therefore, Windows users '''must''' run
We are developing in a heterogeneous environment with both Unix and Windows machines. Therefore it is imperative to have all files in the repository in the canonical LF-only format. Therefore, Windows users '''must''' run
Line 97: Line 129:
git config --global commit.template <path to qt5.git or qt.git>/.commit-template
git config --global commit.template <path to qt5.git or qt.git>/.commit-template
</pre>
</pre>
A common mistake is forgetting to add new files to a commit. Therefore it is recommended to set up git to always show them in <tt>git stat</tt> and <tt>git commit</tt>, even if this is somewhat slower (especially on Windows):
<pre>
git config --global status.showuntrackedfiles all
</pre>
Pre-2.0 git has a somewhat stupid default that <tt>git push</tt> will push ''all'' branches to the upstream repository, which is almost never what you want. To fix this, use:
<pre>
git config --global push.default tracking
</pre>
This is not relevant for mainline branches under Gerrit control, as all pushing happens with refs anyway, but it may be important for your private clones.


Sometimes it is necessary to resolve the same conflicts multiple times. Git has the ability to record and replay conflict resolutions automatically, but - surprise surprise - it is not enabled by default. To fix it, run:
Sometimes it is necessary to resolve the same conflicts multiple times. Git has the ability to record and replay conflict resolutions automatically, but - surprise surprise - it is not enabled by default. To fix it, run:
Line 142: Line 160:
</pre>
</pre>


== Getting the source code ==
==Getting the source code==


=== Cloning Qt5 ===
===Cloning Qt5===
You should clone from the [http://code.qt.io/ official mirror] and track changes from there in order to keep the load on Gerrit down.
You should clone from the [http://code.qt.io/ official mirror] and track changes from there in order to keep the load on Gerrit down.


Line 151: Line 169:
After getting the source code, if you did not use the init-repository script to clone the source code as described in the guide, or you want to manually clone only a submodule, make sure you also [[#Setting up git hooks|manually set up the git commit hooks]] and [[#Setting up gerrit git remote|set up a git remote that point to Qt's gerrit instance]].
After getting the source code, if you did not use the init-repository script to clone the source code as described in the guide, or you want to manually clone only a submodule, make sure you also [[#Setting up git hooks|manually set up the git commit hooks]] and [[#Setting up gerrit git remote|set up a git remote that point to Qt's gerrit instance]].


=== Cloning Qt Creator ===
===Cloning Qt Creator===


<pre>
<pre>
Line 157: Line 175:
</pre>
</pre>


Setup the gerrit remote
==Setting up git hooks==
 
'''NOTE:''' This is only needed if you did NOT use the init-repository script to get the source code, that automatically configures the git hooks for you.


<pre>
It's recommended to use the git hooks from the [https://code.qt.io/cgit/qt/qtrepotools.git/ qtrepotools] repo, which makes it simpler to fetch any updates to the git hooks by a <tt>git pull</tt>.
git remote add gerrit ssh://codereview.qt-project.org/qt-creator/qt-creator
</pre>


If you are behind a SSH-blocking firewall, use the https protocol:
The git_post_commit_hook from the [https://code.qt.io/cgit/qt/qtrepotools.git/ qtrepotools] repository, gives you the checks of the [[Early Warning System|Sanity Bot]] locally.


This section assumes you have a qtrepotools checkout. <qt module checkout dir> is the path to the Qt repo where you want to set up the git hooks.
* On systems that support symlinks (Unix) the git hooks can be set up by creating symlinks to the scripts in <tt><qtrepotools dir>/git-hooks/</tt>:
<pre>
<pre>
git remote add gerrit https://codereview.qt-project.org/a/qt-creator/qt-creator
cd <qt module checkout dir>/.git/hooks
ln -s <path to qtrepotools dir>/git-hooks/gerrit_commit_msg_hook commit-msg
ln -s <path to qtrepotools dir>/git-hooks/git_post_commit_hook post-commit
</pre>
</pre>


== Setting up git hooks ==
* An alternative, that should work on all platforms:
 
** Create <qt module checkout dir>/.git/hooks/{commit-msg,post-commit} files and add this to them (respectively):
'''NOTE:''' This is only needed if you did NOT use the init-repository script to get the source code, that automatically configures the git hooks for you.
commit-msg:
 
To set up the git hooks, install the hook generating Commit-Id files into your top level project directory, as well as all sub-repositories (e.g. qtbase.git) either through (bash)
<pre>
<pre>
gitdir=$(git rev-parse --git-dir); scp -P 29418 codereview.qt-project.org:hooks/commit-msg ${gitdir}/hooks/
#!/bin/sh
exec "<path to qtrepotools clone>/qtrepotools/git-hooks/gerrit_commit_msg_hook" "$@"
</pre>
</pre>
or for Powershell, using utilities provided by puTTY:
 
post-commit:
<pre>
<pre>
$gitdir=$(git rev-parse --git-dir); pscp -p -P 29418 <user>@codereview.qt-project.org:hooks/commit-msg $gitdir/hooks/
#!/bin/sh
exec "<path to qtrepotools clone>/qtrepotools/git-hooks/git_post_commit_hook" "$@"
</pre>
</pre>
or by downloading the file via browser: [http://codereview.qt-project.org/tools/hooks/commit-msg commit-msg] and putting it into the <tt>.git/hooks</tt> directory (make sure it is executable).


It is recommended to install the git_post_commit_hook from the [https://code.qt.io/cgit/qt/qtrepotools.git/ qtrepotools] repository. This gives you the checks of the [[Early Warning System|Sanity Bot]] locally. To do this, save the script
<pre>
<pre>
#! /bin/sh
# Make them executable:
exec "<path to git clone>/qtrepotools/git-hooks/git_post_commit_hook" "$@"
chmod u+x "<qt module checkout dir>/.git/hooks/commit-msg"
chmod u+x "<qt module checkout dir>/.git/hooks/post-commit"
</pre>
</pre>
into each <path to git clone>/.git/hooks/post-commit


'''NOTE:''' Starting with git 1.7.8, if <tt><module name>/.git</tt> contains <tt>gitdir: ../.git/modules/<module name></tt>, you need to put the submodule hooks in <tt>.git/modules/<module name>/hooks</tt> instead of <tt><module name>/.git/hooks</tt>.
'''NOTE:''' Starting with git 1.7.8, if <qt module checkout dir>/.git is a text file that contains <tt>gitdir: ../.git/modules/<module name></tt>, you need to put the git hooks for each sub-module in <tt><path to git super repo>/.git/modules/<module name>/hooks</tt> instead of <tt><qt module checkout dir>/.git/hooks</tt>.


== Setting up gerrit git remote ==
==Setting up gerrit git remote==


In order to easily push your changes to Gerrit, we recommend setting a git remote that points to gerrit.
In order to easily push your changes to Gerrit, we recommend setting a git remote that points to gerrit.
Follow the instructions in one (or more) of the following subsections, depending on which Qt repositories you want to setup Gerrit for.
Follow the instructions in one (or more) of the following subsections, depending on which Qt repositories you want to setup Gerrit for.


=== Qt5 gerrit git remote ===
===Qt5 gerrit git remote===


If you downloaded the sourcecode of Qt5 (or just one of its modules) using something else than the init-repository script, you will have to manually set up the gerrit git remote.
If you downloaded the sourcecode of Qt5 (or just one of its modules) using something else than the init-repository script, you will have to manually set up the gerrit git remote.
Line 212: Line 233:
</pre>
</pre>


=== QtCreator gerrit git remote ===
===QtCreator gerrit git remote===


<pre>
<pre>
Line 224: Line 245:
</pre>
</pre>


== Pushing your local changes to gerrit ==
==Pushing your local changes to gerrit==


See [[Gerrit Introduction]].
See [[Gerrit Introduction]].

Latest revision as of 22:35, 12 February 2024


All projects under the Qt Open Governance umbrella are hosted on our Gerrit Instance. There is an official mirror and browser of these repositories.

In order to be able to propose changes to those projects, you have to first setup your Gerrit account and get Qt's sourcecode, following the steps below:

  1. Set up a Gerrit account
  2. Tweak your SSH config as instructed here
  3. Use the recommended Git settings, defined here
  4. Get the source code of the projects you want to contribute to

Moreover, if you did not use the init-repository scripts to get the source code, you will have to manually:

  1. Set up the git commit hooks .
  2. Set up a Gerrit git remote.

Once all the steps above have been completed, you're ready to submit your patch to Qt!

See also:

How to get started - Gerrit registration

Before starting make sure you have a working Git installation and OpenSSH installed. ( or the bundled version of SSH that comes with recent Git packages).

  1. Create a Qt account, if you don't have one yet.
    • Note: Use an all-lowercase user name. Otherwise, Gerrit will lowercase it for you, and as it is case sensitive, you will have to use mismatched login names.
  2. Log into https://codereview.qt-project.org with your Qt account.
  3. Go to "Settings" -> "Profile", set your real name and register your email address, if it hasn't been automatically registered.
    • You will receive a confirmation email; click on the link inside to finalize your registration.
      • If you use Outlook, manually copy the link including any trailing equal signs into the browser.
    • Note: The email address you use to contribute to the Qt Project will be publicly visible in the Git history. Use an alias + a custom e-mail address if you want to stay anonymous (this is discouraged)
  4. Review and agree to the Qt Project's contribution license agreement (CLA) in Gerrit. You need to do this only once, unless the license changes.
    • If your company has a corporate contribution agreement, ask the admin of your company's Gerrit user group to add your account to this group.
    • More details about the CLA can be found here.
  5. Create a public SSH key for your PC, if you don't have one yet (see below under "Local Setup" for instructions)
  6. Go to "Settings"-> "SSH Public Keys" and upload your public SSH Key.
  7. If you are behind a firewall that blocks SSH access:
    1. Go to "Settings" -> "HTTP Password"
    2. Click "Generate Password"
    3. Add the following line to your ~/.netrc (Windows: ​%USERPROFILE%\_netrc):
      machine codereview.qt-project.org login <Gerrit username> password <Generated password>

Local Setup

Proper configuration of SSH for your Gerrit account is necessary for the URLs in the next steps.

Note: On Windows, when not using OpenSSH, the ~/ shorthand used below can be equated with C:\Users\%USERNAME%\. Make replacements in the example as necessary.

Edit ~/.ssh/config with host information for Gerrit, as shown below. Do not copy comments marked by #, as they may not be ignored by your SSH client.

Host codereview.qt-project.org
    Port 29418
    # To avoid no mutual signature algorithm errors
    PubkeyAcceptedKeyTypes +ssh-rsa
    # Use your Gerrit username, not email or your username on your own machine.
    # You can view this from Settings in gerrit when logged in.
    User yourgerritusername
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_ed25519

Next, you will need to ensure that you have an SSH key pair, and make it known to Gerrit.

  1. If you have no key pair on this machine yet, generate one now. On the command line, invoke the following command, replacing "john-doe-win10-home" with a comment that uniquely describes the machine you're on:
    ssh-keygen -t ed25519 -C john-doe-win10-home -f ~/.ssh/id_ed25519
    Note: SSH keys are intended to be unique to each machine. New keys must be created for each additional machine logging in to Gerrit with SSH.
  2. Open the ~/.ssh/id_ed25519.pub file with a text editor and copy its entire contents into the clipboard.
  3. Log into https://codereview.qt-project.org and navigate to Settings (the gear symbol on the top right) → SSH Keys
  4. Paste the clipboard into the New SSH key entry, and hit the ADD NEW SSH KEY button.

You can verify that the connection works by running:
ssh codereview.qt-project.org

If the connection is functional, you should see a welcome message. End the connection by pressing Ctrl-C. If not, running ssh -v codereview.qt-project.org should give you an error message with details.

When making a connection to codereview.qt-project.org using ssh for the first time a prompt will show asking you to verify the authenticity (public key) of the host using it's fingerprint.

The authenticity of host '[codereview.qt-project.org]:29418 ([54.194.93.196]:29418)' can't be established.
ED25519 key fingerprint is SHA256:DwwqNluQyJVkOk+3bFMK6NwWYIGjMnqGP+R0k59e3CY.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

This prompt will only show the first time connecting to the host or when the host's public keys are changed. When prompted verify that the fingerprint for your key type is correct then accept the host's public key by typing yes, alternatively you could copy the fingerprint into the terminal for it to compare it to the provided fingerprint. Here is a list of current fingerprints for codereview.qt-project.org[1]:

ssh_host_ecdsa_384_key
384 SHA256:yMnqjnsJU0y6kfiyQQu8pYNGPFE7av5QxbeLdjTKNmk (ECDSA)

ssh_host_ecdsa_521_key
521 SHA256:kytLsqmLdG1KXLO/s3OxOajTYqf1+n7+YqqbOUzNbtE (ECDSA)

ssh_host_ecdsa_key
256 SHA256:El3+EYlXAGylCVo/Y/WYzPg7tS4fjejkepO1JVXUkb0 (ECDSA)

ssh_host_ed25519_key
256 SHA256:DwwqNluQyJVkOk+3bFMK6NwWYIGjMnqGP+R0k59e3CY (ED25519)

ssh_host_rsa_key
4096 SHA256:EPuL0PAbNuXXoye7X93ARF7/XALxA5XNAaE3p6M/L3g (RSA)

If the fingerprint the host provides is not included in this list, you might face an attempt for a man-in-the-middle attack or the host keys might have changed, if that happens search for the project's latest keys.

Configuring Git

We are developing in a heterogeneous environment with both Unix and Windows machines. Therefore it is imperative to have all files in the repository in the canonical LF-only format. Therefore, Windows users must run

git config --global core.autocrlf true

to automatically get CRLF line endings which are suitable for the native tools, and Unix users should use

git config --global core.autocrlf input

(this is a safety measure for the case where files with CRLF line endings get into the file system- this can happen when archives are unpacked, attachments saved, etc.).

To be able to create commits which can be pushed to the server, you need to set up your committer information correctly:

git config --global user.name "Your Name"
git config --global user.email "me@example.com"

Please do not use nicknames or pseudonyms instead of the real name unless you have really good reasons. Gerrit will not accept your commits unless the committer information matches the email address(es) you registered.

To facilitate following the style guide for commit messages, it is recommended to install the Qt commit message template:

git config --global commit.template <path to qt5.git or qt.git>/.commit-template

Sometimes it is necessary to resolve the same conflicts multiple times. Git has the ability to record and replay conflict resolutions automatically, but - surprise surprise - it is not enabled by default. To fix it, run:

git config --global rerere.enabled true
git config --global rerere.autoupdate true # this saves you the git add, but you should verify the result with git diff --staged

git pull will show a nice diffstat, so you get an overview of the changes from upstream. git pull --rebase does not do that by default. But you want it:

git config --global rebase.stat true

To get nicely colored patches (from git diff, git log -p, git show, etc.), use this:

git config --global color.ui auto
git config --global core.pager "less -FRSX"

Git supports aliases which you can use to save yourself some typing. For example, these (any similarity with subversion command aliases is purely accidental ;)):

git config --global alias.di diff
git config --global alias.ci commit
git config --global alias.co checkout
git config --global alias.ann blame
git config --global alias.st status

Getting the source code

Cloning Qt5

You should clone from the official mirror and track changes from there in order to keep the load on Gerrit down.

This guide will show you how to get and build the source code.

After getting the source code, if you did not use the init-repository script to clone the source code as described in the guide, or you want to manually clone only a submodule, make sure you also manually set up the git commit hooks and set up a git remote that point to Qt's gerrit instance.

Cloning Qt Creator

git clone git://code.qt.io/qt-creator/qt-creator.git

Setting up git hooks

NOTE: This is only needed if you did NOT use the init-repository script to get the source code, that automatically configures the git hooks for you.

It's recommended to use the git hooks from the qtrepotools repo, which makes it simpler to fetch any updates to the git hooks by a git pull.

The git_post_commit_hook from the qtrepotools repository, gives you the checks of the Sanity Bot locally.

This section assumes you have a qtrepotools checkout. <qt module checkout dir> is the path to the Qt repo where you want to set up the git hooks.

  • On systems that support symlinks (Unix) the git hooks can be set up by creating symlinks to the scripts in <qtrepotools dir>/git-hooks/:
cd <qt module checkout dir>/.git/hooks
ln -s <path to qtrepotools dir>/git-hooks/gerrit_commit_msg_hook commit-msg 
ln -s <path to qtrepotools dir>/git-hooks/git_post_commit_hook post-commit
  • An alternative, that should work on all platforms:
    • Create <qt module checkout dir>/.git/hooks/{commit-msg,post-commit} files and add this to them (respectively):

commit-msg:

#!/bin/sh
exec "<path to qtrepotools clone>/qtrepotools/git-hooks/gerrit_commit_msg_hook" "$@"

post-commit:

#!/bin/sh
exec "<path to qtrepotools clone>/qtrepotools/git-hooks/git_post_commit_hook" "$@"
# Make them executable:
chmod u+x "<qt module checkout dir>/.git/hooks/commit-msg"
chmod u+x "<qt module checkout dir>/.git/hooks/post-commit"

NOTE: Starting with git 1.7.8, if <qt module checkout dir>/.git is a text file that contains gitdir: ../.git/modules/<module name>, you need to put the git hooks for each sub-module in <path to git super repo>/.git/modules/<module name>/hooks instead of <qt module checkout dir>/.git/hooks.

Setting up gerrit git remote

In order to easily push your changes to Gerrit, we recommend setting a git remote that points to gerrit. Follow the instructions in one (or more) of the following subsections, depending on which Qt repositories you want to setup Gerrit for.

Qt5 gerrit git remote

If you downloaded the sourcecode of Qt5 (or just one of its modules) using something else than the init-repository script, you will have to manually set up the gerrit git remote. You don't have to do this if you cloned the Qt5 sourcecode using the init-repository script as described in #Cloning Qt5. That handles it for you.

git remote add gerrit ssh://codereview.qt-project.org/qt/<qt5 or the submodule name you have checked out>

If you are behind a SSH-blocking firewall, use the https protocol:

git remote add gerrit https://codereview.qt-project.org/a/qt/<qt5 or the submodule name you have checked out>

QtCreator gerrit git remote

git remote add gerrit ssh://codereview.qt-project.org/qt-creator/qt-creator

If you are behind a SSH-blocking firewall, use the https protocol:

git remote add gerrit https://codereview.qt-project.org/a/qt-creator/qt-creator

Pushing your local changes to gerrit

See Gerrit Introduction.