Class: Ralph::Git::FileSnapshot

Inherits:
Object
  • Object
show all
Defined in:
lib/ralph/git/file_snapshot.rb

Overview

Captures and compares file state via git for change detection

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(files) ⇒ FileSnapshot

Returns a new instance of FileSnapshot.



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# File 'lib/ralph/git/file_snapshot.rb', line 11

def initialize(files)
  @files = files
end

Instance Attribute Details

#files ⇒ Object (readonly)

Returns the value of attribute files.



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# File 'lib/ralph/git/file_snapshot.rb', line 9

def files
  @files
end

Class Method Details

.capture ⇒ Object

Capture a snapshot of all tracked/modified files and their git hashes



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# File 'lib/ralph/git/file_snapshot.rb', line 16

def self.capture
  files = {}
  begin
    status, _, _ = Open3.capture3("git", "status", "--porcelain")
    tracked, _, _ = Open3.capture3("git", "ls-files")

    all_files = Set.new
    status.strip.each_line do |line|
      name = line[3..]&.strip
      all_files.add(name) if name && !name.empty?
    end
    tracked.strip.each_line do |file|
      f = file.strip
      all_files.add(f) unless f.empty?
    end

    all_files.each do |file|
      begin
        hash, _, _ = Open3.capture3("git", "hash-object", file)
        files[file] = hash.strip unless hash.strip.empty?
      rescue StandardError
        # skip
      end
    end
  rescue StandardError
    # git not available
  end
  new(files)
end

Instance Method Details

#modified_since(other) ⇒ Object

Return list of files that changed between this snapshot and a later one



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# File 'lib/ralph/git/file_snapshot.rb', line 47

def modified_since(other)
  Array.new.tap do |changed|
    other.files.each do |file, hash|
      changed << file if files[file] != hash
    end

    files.each_key do |file|
      changed << file unless other.files.key?(file)
    end
  end
end