Class: Ask::Tools::Write

Inherits:
Ask::Tool
  • Object
show all
Defined in:
lib/ask/tools/shell/write.rb

Overview

Write content to a file, creating parent directories automatically.

Constant Summary collapse

MAX_CONTENT_SIZE = 
500_000

Instance Method Summary collapse

Instance Method Details

#execute(path:, content:) ⇒ Object 



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# File 'lib/ask/tools/shell/write.rb', line 18

def execute(path:, content:)
  path = File.expand_path(path)

  if content.length > MAX_CONTENT_SIZE
    return Ask::Result.error(
      message: "Content too large (#{content.length} bytes). Maximum is #{MAX_CONTENT_SIZE} bytes."
    )
  end

  # Never destroy what the model never saw: if Read only showed part of
  # this file and it hasn't changed since, the rest may hold something
  # the overwrite would silently erase.
  if Shell::FileLedger.partially_seen?(path)
    entry = Shell::FileLedger.entry_for(path)
    seen = entry.lines_seen
    return Ask::Result.error(
      message: "Refusing to overwrite #{path}: only part of the file has been read " \
               "(lines #{seen.first + 1}–#{seen.last} shown, more lines exist). " \
               "Re-read the full file first."
    )
  end

  dir = File.dirname(path)
  FileUtils.mkdir_p(dir) unless File.directory?(dir)

  bytes = File.write(path, content)
  Ask::Result.ok(data: { path: path, bytes: bytes },
                  metadata: { path: path, bytes: bytes })
end