├── README.md
└── bin
    ├── compile
    ├── detect
    └── release


/README.md:
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 1 | # heroku-buildpacks-sourceversion
 2 | Writes the SOURCE_VERSION variable (usually the Git SHA) to a file for use by the app.
 3 | 
 4 | Created by @sreid out of the need to show which Git commit version of an app was running on a Heroku instance. Made possible by the [addition of the SOURCE_VERSION variable during the build process](https://devcenter.heroku.com/changelog-items/630). This variable is available during the build process, but not available to a running app, making this approach neccessary. Suggestions and improvements appreciated!
 5 | 
 6 | ## Usage
 7 | To use this buildpack, the app should already be successfully running the [multi buildpack](https://github.com/heroku/heroku-buildpack-multi).
 8 | 
 9 | Then just add this buildpack in addition to the existing buildpacks in the `.buildpacks` file:
10 | 
11 | 	https://github.com/sreid/heroku-buildpack-sourceversion.git
12 | 
13 | In the application code, read the `.source_version` file that will be created on deployment. For example, in a Rails, it might look something like:
14 | 
15 | 	git_sha = File.read(Rails.root.join('.source_version'))
16 | 
17 | (add any error handling for environments where this file doesn't exist, such as your development machine, of course...)
18 | 
19 | ## License
20 | MIT


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/bin/compile:
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 1 | #!/bin/sh
 2 | 
 3 | # Syntax bin/compile <build-dir> <cache-dir>
 4 | 
 5 | BUILD_DIR=$1
 6 | CACHE_DIR=$2
 7 | 
 8 | echo "=====> Writing out SOURCE_VERSION to .source_version ($SOURCE_VERSION)"
 9 | echo $SOURCE_VERSION > $BUILD_DIR/.source_version
10 | 


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/bin/detect:
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1 | #!/bin/sh
2 | 
3 | exit 0
4 | 


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/bin/release:
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1 | #!/bin/sh
2 | 
3 | exit 0
4 | 


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