class Detector::Java::Cli

Overview

Detects Java command-line applications. Gated strictly on CLI-library imports or unambiguous arg-parser constructs — NOT on bare main(String[] args) / System.getenv, which every Java app (web servers included) has.

Defined in:

detector/detectors/java/cli.cr

Constant Summary

LIB_IMPORTS = ["picocli.", "org.kohsuke.args4j", "com.beust.jcommander", "org.apache.commons.cli", "com.github.rvesse.airline", "io.airlift.airline", "joptsimple."]
USAGE = /\bnew\s+Options\s*\(\s*\)|\bOption\.builder\s*\(|\bnew\s+JCommander\s*\(|\bJCommander\.newBuilder\s*\(|\bnew\s+CmdLineParser\s*\(|\bnew\s+CommandLine\s*\(/

NOTE deliberately no new\s+OptionParser\s*\( alternative here — jopt-simple's OptionParser is a common, generic class name apps also give their own options-parsing helpers (e.g. a video/report settings OptionParser). Genuine jopt-simple usage always requires import joptsimple.* or a joptsimple. fully-qualified reference, which LIB_IMPORTS already covers — adding a bare class-name pattern here would mistag unrelated classes as java_cli.

Class Method Summary

Instance Method Summary

Instance methods inherited from class Detector

applicable?(filename : String) : Bool applicable?, base_relative_path(filename : String) : String base_relative_path, content_matches?(file_contents : String, markers : Regex) : Bool content_matches?, detect(filename : String, file_contents : String) : Bool detect, gemfile_dependency?(file_contents : String, gem_name : String) : Bool gemfile_dependency?, gemspec_dependency?(file_contents : String, gem_name : String) : Bool gemspec_dependency?, idempotent? : Bool idempotent?, logger : NoirLogger logger, name : String name, path_sensitive? : Bool path_sensitive?

Constructor methods inherited from class Detector

new(options : Hash(String, YAML::Any)) new

Macros inherited from class Detector

detector_for(tech, extensions = nil, basenames = nil, path_segments = nil, idempotent = nil) detector_for

Class Method Detail

def self.tech_name : String #

The tech name without needing an instance, so the registry can be read off the classes themselves rather than from a parallel list.


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Instance Method Detail

def applicable?(filename : String) : Bool #
Description copied from class Detector

Cheap filename-only filter the detector pass uses to skip #detect on files the detector cannot possibly match. The default true preserves prior behavior (every detector runs on every file). Override with the same predicate the body of #detect starts with — e.g., filename.ends_with?(".py") for a Python framework detector — so the detector loop avoids the #detect dispatch on files outside the detector's language.

On large codebases (saleor's 4255 .py files) this lifts ~100 virtual #detect calls per file out of the hot loop because most detectors' inner first-line is exactly this kind of cheap filename check.


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def detect(filename : String, file_contents : String) : Bool #

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def set_name #

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