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Add Add Linux As A Bundler Platform as a ruby til

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2021-02-21 18:26:14 -06:00
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# Add Linux As A Bundler Platform
With a locally developed Ruby project on Mac OSX, I have `darwin` specified as
the _platform_ in the `Gemfile.lock`.
```ruby
PLATFORMS
x86_64-darwin-19
```
When setting up CI for my project on a linux container, I'd get an error like
this:
> Your bundle only supports platforms ["x86_64-darwin-19"] ...
This platform incompatability can be solved with by adding linux as a platform
and re-resolving the lock file. This is done with [`bundle
lock`](https://bundler.io/v2.0/man/bundle-lock.1.html) and the `--add-platform`
flag.
```bash
$ bundle lock --add-platform x86_64-linux
```
If all existing gems work with the new linux platform, the command will succeed
and the updated `Gemfile.lock` will have the following `PLATFORMS` section.
```ruby
PLATFORMS
x86_64-darwin-19
x86_64-linux
```
[source](https://github.com/rubygems/rubygems/issues/4269#issuecomment-759591430)