Style-CommandLiteral.md

Pattern: Missing `` or %x around command literal

Issue: -

Description

This rule enforces using `` or %x around command literals.

Examples

# Good if EnforcedStyle is backticks or mixed, bad if percent_x.
folders = `find . -type d`.split

# Good if EnforcedStyle is percent_x, bad if backticks or mixed.
folders = %x(find . -type d).split

# Good if EnforcedStyle is backticks, bad if percent_x or mixed.
`
  ln -s foo.example.yml foo.example
  ln -s bar.example.yml bar.example
`

# Good if EnforcedStyle is percent_x or mixed, bad if backticks.
%x(
  ln -s foo.example.yml foo.example
  ln -s bar.example.yml bar.example
)

# Bad unless AllowInnerBackticks is true.
`echo \`ls\``

Default configuration

Attribute	Value
EnforcedStyle	backticks
SupportedStyles	backticks, percent_x, mixed
AllowInnerBackticks	false

Further Reading

• RuboCop - Style/CommandLiteral
• https://github.com/bbatsov/ruby-style-guide#percent-x