44 lines
1.2 KiB
Ruby
44 lines
1.2 KiB
Ruby
class Antlr < Formula
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desc "ANother Tool for Language Recognition"
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homepage "https://www.antlr.org/"
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url "https://www.antlr.org/download/antlr-4.7.1-complete.jar"
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sha256 "f41dce7441d523baf9769cb7756a00f27a4b67e55aacab44525541f62d7f6688"
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bottle :unneeded
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depends_on :java
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def install
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prefix.install "antlr-#{version}-complete.jar"
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(bin/"antlr4").write <<~EOS
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#!/bin/bash
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CLASSPATH="#{prefix}/antlr-#{version}-complete.jar:." exec java -jar #{prefix}/antlr-#{version}-complete.jar "$@"
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EOS
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(bin/"grun").write <<~EOS
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#!/bin/bash
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java -classpath #{prefix}/antlr-#{version}-complete.jar:. org.antlr.v4.gui.TestRig "$@"
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EOS
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end
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test do
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path = testpath/"Expr.g4"
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path.write <<~EOS
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grammar Expr;
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prog:\t(expr NEWLINE)* ;
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expr:\texpr ('*'|'/') expr
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|\texpr ('+'|'-') expr
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|\tINT
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|\t'(' expr ')'
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;
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NEWLINE :\t[\\r\\n]+ ;
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INT :\t[0-9]+ ;
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EOS
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ENV.prepend "CLASSPATH", "#{prefix}/antlr-#{version}-complete.jar", ":"
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ENV.prepend "CLASSPATH", ".", ":"
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system "#{bin}/antlr4", "Expr.g4"
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system "javac", *Dir["Expr*.java"]
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assert_match(/^$/, pipe_output("#{bin}/grun Expr prog", "22+20\n"))
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end
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end
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