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core/src/main/java/org/jruby/util/RubyFiletypeDetector.java
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package org.jruby.util; | ||
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import java.io.BufferedReader; | ||
import java.io.IOException; | ||
import java.nio.charset.StandardCharsets; | ||
import java.nio.file.Files; | ||
import java.nio.file.Path; | ||
import java.nio.file.spi.FileTypeDetector; | ||
import java.util.Locale; | ||
import java.util.regex.Pattern; | ||
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public final class RubyFiletypeDetector extends FileTypeDetector { | ||
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private static final String[] KNOWN_RUBY_FILES = new String[]{ "Gemfile", "Rakefile", "Mavenfile" }; | ||
private static final String[] KNOWN_RUBY_SUFFIXES = new String[]{ ".rb", ".rake", ".gemspec" }; | ||
private static final String RUBY_MIME = "application/x-ruby"; | ||
private static final Pattern SHEBANG_REGEXP = Pattern.compile("^#! ?/usr/bin/(env +ruby|ruby).*"); | ||
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@Override | ||
public String probeContentType(Path path) throws IOException { | ||
final Path fileNamePath = path.getFileName(); | ||
if (fileNamePath == null) { | ||
return null; | ||
} | ||
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final String fileName = fileNamePath.toString(); | ||
final String lowerCaseFileName = fileName.toLowerCase(Locale.ROOT); | ||
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for (String candidate : KNOWN_RUBY_SUFFIXES) { | ||
if (lowerCaseFileName.endsWith(candidate)) { | ||
return RUBY_MIME; | ||
} | ||
} | ||
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for (String candidate : KNOWN_RUBY_FILES) { | ||
if (fileName.equals(candidate)) { | ||
return RUBY_MIME; | ||
} | ||
} | ||
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try (BufferedReader fileContent = Files.newBufferedReader(path, StandardCharsets.UTF_8)) { | ||
final String firstLine = fileContent.readLine(); | ||
if (firstLine != null && SHEBANG_REGEXP.matcher(firstLine).matches()) { | ||
return RUBY_MIME; | ||
} | ||
} | ||
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return null; | ||
} | ||
} | ||
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core/src/main/resources/META-INF/services/java.nio.file.spi.FileTypeDetector
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org.jruby.util.RubyFiletypeDetector |