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June 3, 2010 10:58
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GitInfo: Rack middleware example
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| .DS_Store | |
| *.log |
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| require 'rubygems' | |
| require 'sinatra' | |
| # LET'S USE OUT MIDDLEWARE ----------------------------------------------> | |
| require 'rack/gitinfo' | |
| use Rack::GitInfo | |
| # use Rack::GitInfo, :path => '/Users/karmi/Playground/Rails/rails' | |
| # <----------------------------------------------------------------------- | |
| get '/' do | |
| erb :index | |
| end | |
| __END__ | |
| @@ layout | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Rack::GitInfo Example</title> | |
| <meta charset="utf-8"> | |
| <style>body { font-family: sans-serif; margin: 4em; } small { color: #333; }</style> | |
| </head> | |
| <body> | |
| <%= yield %> | |
| </body> | |
| </html> | |
| @@index | |
| <p>Hey, am I in Git?</p> |
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| # = Rack::GitInfo | |
| # | |
| # Example Rack middleware to show revision info from Git | |
| # | |
| # For a more advanced library have a look at http://github.com/sickill/rack-revision-info | |
| module Rack | |
| class GitInfo | |
| def initialize(app, options={}) | |
| @app = app | |
| @path = options[:path] || ::File.expand_path('../', $0) | |
| end | |
| def call(env) | |
| status, headers, body = @app.call(env) | |
| if headers['Content-Type'].to_s.include?('text/html') # Only update HTML bodies | |
| body = (body << message).to_a.join("\n") | |
| headers['Content-Length'] = Rack::Utils.bytesize(body.to_s).to_s | |
| headers['X-Git-Revision-ID'] = @sha | |
| end | |
| [status, headers, body] | |
| end | |
| private | |
| def git_revision_info | |
| output = %x[( GIT_DIR=#{@path}/.git git log -1 --no-color --pretty=format:'%H~~~%ai~~~%an~~~%s' 2>&1)] | |
| output =~ /(fatal)|(no such file)/i ? nil : output | |
| end | |
| def message | |
| @sha, date, author, message = git_revision_info.split('~~~') | |
| "<p><small>Revision info: #{@sha} from #{date} by #{author} : #{message}</small></p>" | |
| rescue | |
| @sha = 'N/A' | |
| "<p><small>Cannot get Git revision info</small></p>" | |
| end | |
| end | |
| end |
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