Merge pull request #2627 from uberhacker/add-antlr4-package

Add antlr4 package

packages/antlr4.rb

+require 'package'
+
+class Antlr4 < Package
+  description 'ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.'
+  homepage 'http://www.antlr.org/'
+  version '4.7.1'
+  source_url 'https://raw.githubusercontent.com/antlr/antlr4/4.7.1/README.md'
+  source_sha256 '70a58ea4c4f5ed23306313782bc13f36c3529d9a990e95ab273d5deed9286d4f'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'jdk8'
+
+  def self.install
+    system 'wget https://www.antlr.org/download/antlr-4.7.1-complete.jar'
+    abort 'Checksum mismatch. :/ Try again.'.lightred unless Digest::SHA256.hexdigest( File.read('antlr-4.7.1-complete.jar') ) == 'f41dce7441d523baf9769cb7756a00f27a4b67e55aacab44525541f62d7f6688'
+    system "install -Dm644 antlr-4.7.1-complete.jar #{CREW_DEST_LIB_PREFIX}/antlr-4.7.1-complete.jar"
+  end
+
+  def self.postinstall
+    puts
+    puts "To complete the installation, execute the following:".lightblue
+    puts "echo 'export CLASSPATH=\".:#{CREW_LIB_PREFIX}/antlr-4.7.1-complete.jar:$CLASSPATH\"' >> ~/.bashrc".lightblue
+    puts "echo 'alias antlr4=\"java -jar #{CREW_LIB_PREFIX}/antlr-4.7.1-complete.jar\"' >> ~/.bashrc".lightblue
+    puts "echo 'alias grun=\"java org.antlr.v4.gui.TestRig\"' >> ~/.bashrc".lightblue
+    puts "source ~/.bashrc".lightblue
+    puts
+  end
+end