mirror of
https://github.com/splitsh/lite.git
synced 2024-06-29 10:40:57 +02:00
131 lines
4.4 KiB
Markdown
131 lines
4.4 KiB
Markdown
Monolithic Repositories to Many Repositories made easy
|
|
======================================================
|
|
|
|
**tl;dr**: **splitsh-lite** is a replacement for the `subtree split` Git
|
|
built-in command that is much faster and has more features at the same time.
|
|
|
|
When starting a new project, do you store all the code in one monolithic
|
|
repository? Or are you creating many repositories?
|
|
|
|
Both strategies work well but both have drawbacks as well. **splitsh** helps use
|
|
both strategies at the same time by providing tools that automatically
|
|
synchronize a mono repository to many repositories.
|
|
|
|
**splitsh-lite** is a sub-project with the goal of providing a faster replacement
|
|
of the `git subtree split` command.
|
|
|
|
If you want to learn more about monorepo vs manyrepos, watch this [4-minute
|
|
lightning talk](http://www.thedotpost.com/2016/05/fabien-potencier-monolithic-repositories-vs-many-repositories)
|
|
I gave at dotScale
|
|
(or [read the slides](https://speakerdeck.com/fabpot/a-monorepo-vs-manyrepos))...
|
|
or watch the longer version from
|
|
[DrupalCon](https://www.youtube.com/watch?v=4w3-f6Xhvu8).
|
|
|
|
The main **splitsh-lite** feature is its ability to create a branch in a repository
|
|
from one or many directories.
|
|
|
|
Installation
|
|
------------
|
|
|
|
Install libgit2:
|
|
|
|
```bash
|
|
go get -d github.com/libgit2/git2go
|
|
cd $GOPATH/src/github.com/libgit2/git2go
|
|
git checkout next
|
|
git submodule update --init
|
|
make install
|
|
```
|
|
|
|
Compiling
|
|
|
|
```bash
|
|
go get github.com/splitsh/lite
|
|
go build -o splitsh-lite github.com/splitsh/lite
|
|
```
|
|
|
|
If everything goes fine, a `splitsh-lite` binary should be available in the
|
|
current directory.
|
|
|
|
Usage
|
|
-----
|
|
|
|
Let say you want to split the `lib/` directory of a repository to its own
|
|
branch; from the "master" Git repository (bare or clone), run:
|
|
|
|
```bash
|
|
splitsh-lite --prefix=lib/
|
|
```
|
|
|
|
The *sha1* of the split is displayed at the end of the execution:
|
|
|
|
```bash
|
|
SHA1=`splitsh-lite --prefix=lib/`
|
|
```
|
|
|
|
The sha1 can be used to create a branch or to push the commits to a new
|
|
repository.
|
|
|
|
Automatically create a branch for the split by passing a branch name
|
|
via the `--target` option:
|
|
|
|
```bash
|
|
splitsh-lite --prefix=lib/ --target=branch-name
|
|
```
|
|
|
|
If new commits are made on the repository, update the split by running the same
|
|
command again. Updates are much faster as **splitsh-lite** keeps a cache of already
|
|
split commits. Caching is possible as **splitsh-lite** guarantees that two splits of
|
|
the same code always results in the same history and the same `sha1`s for each
|
|
commit.
|
|
|
|
By default, **splitsh-lite** splits the current checkout-ed branch but you can split
|
|
a different branch by passing it explicitly with `--origin` (mandatory when
|
|
splitting a bare repository):
|
|
|
|
```bash
|
|
splitsh-lite --prefix=lib/ --origin=origin/1.0
|
|
```
|
|
|
|
You don't even need to run the command from the Git repository directory if you
|
|
pass the `--path` option:
|
|
|
|
```bash
|
|
splitsh-lite --prefix=lib/ --origin=origin/1.0 --path=/path/to/repo
|
|
```
|
|
|
|
Available options:
|
|
|
|
* `--prefix` is the prefix of the directory to split; you can put the split
|
|
contents in a directory by using the `--prefix=from:to` syntax; splitting
|
|
several directories is also possible by passing multiple `--prefix` options;
|
|
|
|
* `--path` is the path to the repository to split (current directory by default);
|
|
|
|
* `--origin` is the Git reference for the origin (can be any Git reference
|
|
like `HEAD`, `heads/xxx`, `tags/xxx`, `origin/xxx`, or any `refs/xxx`);
|
|
|
|
* `--target` creates a reference for the tip of the split (can be any Git reference
|
|
like `HEAD`, `heads/xxx`, `tags/xxx`, `origin/xxx`, or any `refs/xxx`);
|
|
|
|
* `--progress` displays a nice progress bar during the split;
|
|
|
|
* `--quiet` suppresses all output on stderr (useful when run from an automated
|
|
script).
|
|
|
|
* `--scratch` flushes the cache (useful when a branch is force pushed or in
|
|
case of corruption)
|
|
|
|
* `--git` simulates old versions of `git subtree split`. **splitsh** generates
|
|
the same `sha1`s as the latest version of Git by default (`latest`).
|
|
Simulate old versions of Git by using `<1.8.2` or `<2.8.0`.
|
|
|
|
**splitsh** provides more features including a sanity checker, GitHub integration
|
|
for real-time splitting, tagging management and synchronization, and more.
|
|
It has been used by the Symfony project for many years but the tool is not yet
|
|
ready for Open-Source. Stay tuned!
|
|
|
|
If you think that your Open-Source project might benefit from the full version
|
|
of splitsh, send me an email and I will consider splitting your project for free
|
|
on my servers (like I do for Symfony and Laravel).
|