“Jiri integrates repositories intelligently”
Jiri is a tool for multi-repo development. It supports:
Jiri has an extensible plugin model, making it easy to create new sub-commands.
Jiri is open-source.
We have prebuilts for linux and darwin x86_64
systems. In order to build jiri manually use these instructions.
Jiri organizes a set of repositories on your local filesystem according to a manifest. These repositories are referred to as “projects”, and are all contained within a single directory called the “jiri root”.
The manifest file specifies the relative location of each project within the jiri root, and also includes other metadata about the project such as its remote url, the remote branch it should track, and more.
The jiri update
command syncs the master branch of all local projects to the revision and remote branch specified in the manifest for each project. Jiri will create the project locally if it does not exist, and if run with the -gc
flag, jiri will “garbage collect” any projects that are not listed in the manifest by deleting them locally.
The .jiri_manifest
file in the jiri root describes which project jiri should sync. Typically the .jiri_manifest
file will import other manifests, but it can also contain a list of projects.
For example, here is a simple .jiri_manifest
with just two projects, “foo” and “bar”, which are hosted on github and bitbucket respectively.
<?xml version="1.0" encoding="UTF-8"?> <manifest> <projects> <project name="foo-project" remote="https://github.com/my-org/foo" path="foo"/> <project name="bar" remote="https://bitbucket.com/other-org/bar" path="bar"/> </projects> </manifest>
When you run jiri update
for the first time, the “foo” and “bar” repos will be cloned into foo
and bar
respectively and repos would be put on DETACHED HEAD. Running jiri update
again will update all the remote refs and rebase your current branch to its upstream branch.
Note that the project paths do not need to be immediate children of the jiri root. We could have decided to set the path
attribute for the “bar” project to “third_party/bar”, or even nest “bar” inside the “foo” project by setting the path
to “foo/bar” (assuming no files in the foo repo conflict with bar).
Because manifest files also need to be kept in sync between various team members, it often makes sense to keep your team's manifests in a version controlled repository.
Jiri makes it easy to “import” a remote manifest from your local .jiri_manifest
file with the jiri import
command. For example, running the following command will create a .jiri_manifest
file (or append to an existing one) with an import
tag that imports the minimal manifest from the https://fuchsia.googlesource.com/manifest
repo.
jiri import minimal https://fuchsia.googlesource.com/manifest
The next time you run jiri update
, jiri will sync all projects listed in the minimal manifest.
This section explains how to get started with jiri.
First we “bootstrap” jiri so that it can sync and build itself.
Then we create and import a new manifest, which specifies how jiri should manage your projects.
You can get jiri up-and-running in no time with the help of the bootstrap script.
First, pick a jiri root directory. All projects will be synced to subdirectories of the root.
export MY_ROOT=$HOME/myroot
Execute the jiri_bootstrap
script, which will fetch and build the jiri tool, and initialize the root directory.
curl -s https://raw.githubusercontent.com/fuchsia-mirror/jiri/master/scripts/bootstrap_jiri | bash -s "$MY_ROOT"
The jiri
command line tool will be installed in $MY_ROOT/.jiri_root/bin/jiri
, so add that to your PATH
.
export PATH="$MY_ROOT"/.jiri_root/bin:$PATH
Next, use the jiri import
command to import the “minimal” manifest from the Fuchsia repo. This manifest includes only the projects needed to build the Jiri itself.
You can see the minimal manifest here. For more information on manifests, read the manifest docs.
cd "$MY_ROOT" jiri import minimal https://fuchsia.googlesource.com/manifest
You should now have a file in the root directory called .jiri_manifest
, which will contain a single import.
Finally, run jiri update
, which will sync all local projects to the revisions listed in the manifest (which in this case will be HEAD
).
jiri update
You should now see the jiri project in $MY_ROOT/src/fuchsia.googlesource.com/jiri
.
Running jiri update
again will sync the local repos to the remotes, and update the jiri tool.
Now that jiri is able to sync and build itself, we must tell it how to manage your projects.
In order for jiri to manage a set of projects, those projects must be listed in a manifest, and that manifest must be hosted in a git repo.
If you already have a manifest hosted in a git repo, you can import that manifest the same way we imported the “minimal” manifest.
For example, if your manifest is called “my_manifest” and is in a repo hosted at “https://github.com/my_org/manifests”, then you can import that manifest as follows.
jiri import my_manifest https://github.com/my_org/manifests
The rest of this section walks through how to create a manifest from scratch, host it from a local git repo, and get jiri to manage it.
Suppose that the project you want jiri to manage is the “Hello-World” repo located at https://github.com/Test-Octowin/Hello-World.
First we‘ll create a new git repo to host the manifest we’ll be writing.
mkdir -p /tmp/my_manifest_repo cd /tmp/my_manifest_repo git init
Next we'll create a manifest and commit it to the manifest repo.
The manifest file will include the Hello-World repo as well as the manifest repo itself.
cat <<EOF > my_manifest <?xml version="1.0" encoding="UTF-8"?> <manifest> <projects> <project name="Hello-World" remote="https://github.com/Test-Octowin/Hello-World" path="helloworld"/> <project name="manifest" remote="/tmp/my_manifest_repo" path="manifest"/> </projects> </manifest> EOF git add my_manifest git commit -m "Add my_manifest."
This manifest contains a single project with the name “Hello-World” and the remote of the repo. The path
attribute tells jiri to sync this repo inside the helloworld
directory.
Normally we would want to push this repo to some remote to make it accessible to other users who want to sync the same projects. For now, however, we'll just refer to the repo by its path in the local filesystem.
Now we just need to import that new manifest and jiri update
. Since we don't want the new manifest repo to conflict with the minimal manifest repo, we must pass the -path
flag to the import statement.
cd "$MY_ROOT" jiri import -path="my_manifest_repo" my_manifest /tmp/my_manifest_repo jiri update
You should now see the Hello-World repo in $MY_ROOT/helloworld
, and your manifest repo in $MY_ROOT/my_manifest_repo
.
The jiri help
command will print help documentation about the jiri
tool and its subcommands.
For general documentation, including a list of subcommands, run jiri help
. To find documentation about a specific topic or subcommand, run jiri help <command>
.
branch Show or delete branches grep Search across projects import Adds imports to .jiri_manifest file init Create a new jiri root patch Patch in the existing change project Manage the jiri projects selfupdate Update jiri tool snapshot Create a new project snapshot status Prints status of all the projects update Update all jiri projects upload Upload a changelist for review version Print the jiri version runp Run a command in parallel across jiri projects help Display help for commands or topics
Run jiri help [command]
for command usage.
See the jiri filesystem docs.
See the jiri manifest docs.
TODO(anmittal): Write me.
Gerrit is a collaborative code-review tool used by many open source projects.
One of the peculiarities of Gerrit is that it expects a changelist to be represented by a single commit. This constrains the way developers may use git to work on their changes. In particular, they must use the --amend flag with all but the first git commit operation and they need to use git rebase to sync their pending code change with the remote master. See Android‘s repo command reference or Go’s contributing instructions for examples of how intricate the workflow for resolving conflicts between the pending code change and the remote master is.
The rest of this section describes common development operations using jiri upload
.
All development should take place on a non-master “feature” branch. Once the code is reviewed and approved, it is merged into the remote master via the Gerrit code review system. The change can then be merged into the local branches with jiri update -rebase-all
.
jiri update
git checkout -b <branch-name> --track origin/master
git add <file1> <file2> ... <fileN>
git commit
jiri update
git checkout <branch-name>
git rebase origin/master
git add <file1> <file2> ... <fileN>
git commit --amend
git checkout <branch-name>
jiri upload
If the CL upload is successful, this will print the URL of the CL hosted on Gerrit. You can add reviewers and comments through the Gerrit web UI at that URL.
Note that there are many useful flags for jiri upload
. You can learn about them by running jiri help upload
.
git checkout <branch-name>
git commit --amend
jiri upload
jiri cl upload
jiri update
git checkout JIRI_HEAD && git branch -d <branch-name>
If you have changes A and B, and B depends on A, you can still submit distinct CLs for A and B that can be reviewed and submitted independently (although A must be submitted before B).
First, create your feature branch for A, make your change, and upload the CL for review according to the instructions above.
Then, while still on the feature branch for A, create your feature branch for B.
git checkout -b feature-B --track origin/master
Then make your change and upload the CL for review according to the instructions above.
You can respond to review comments by submitting new patch sets as normal.
After the CL for A has been submitted, make sure to clean up A's feature branch and upload a new patch set for feature B.
jiri update # fetch update that includes feature A git checkout feature-B git rebase -i origin/master # if u see commit from A, delete it and then rebase properly jiri upload # send new patch set for feature B
The CL for feature B can now be submitted.
This process can be extended for more than 2 CLs. You must keep two things in mind:
Jiří is a very popular boys name in the Czech Republic.
We pronounce “jiri” like “yiree”.
The actual Czech name Jiří is pronounced something like “yirzhee”.