The sass-convert command, which is included by default in the sass gem and converts CSS to Sass (Scss), was convenient, so I’d like to introduce it.

Installing sass-convert

First, let’s install sass-convert.

sass-convert is included by default when you install the sass gem, so you just need to run gem install sass without thinking about it to complete the installation.

gem install sass

How to Use sass-convert

Check the usage with sass-convert —help.

$ sass-convert --help
Usage: sass-convert [options] [INPUT] [OUTPUT]

Description:
  Converts between CSS, indented syntax, and SCSS files. For example,
  this can convert from the indented syntax to SCSS, or from CSS to
  SCSS (adding appropriate nesting).

Common Options:
    -F, --from FORMAT                The format to convert from. Can be css, scss, sass.
                                     By default, this is inferred from the input filename.
                                     If there is none, defaults to css.
    -T, --to FORMAT                  The format to convert to. Can be scss or sass.
                                     By default, this is inferred from the output filename.
                                     If there is none, defaults to sass.
    -i, --in-place                   Convert a file to its own syntax.
                                     This can be used to update some deprecated syntax.
    -R, --recursive                  Convert all the files in a directory. Requires --from and --to.
    -?, -h, --help                   Show this help message.
    -v, --version                    Print the Sass version.

Style:
        --dasherize                  Convert underscores to dashes.
        --indent NUM                 How many spaces to use for each level of indentation. Defaults to 2.
                                     "t" means use hard tabs.
        --old                        Output the old-style ":prop val" property syntax.
                                     Only meaningful when generating Sass.

Input and Output:
    -s, --stdin                      Read input from standard input instead of an input file.
                                     This is the default if no input file is specified. Requires --from.
    -E, --default-encoding ENCODING  Specify the default encoding for input files.
        --unix-newlines              Use Unix-style newlines in written files.
                                     Always true on Unix.

Miscellaneous:
        --cache-location PATH        The path to save parsed Sass files. Defaults to .sass-cache.
    -C, --no-cache                   Don't cache to sassc files.
    -q, --quiet                      Silence warnings and status messages during conversion.
        --trace                      Show a full Ruby stack trace on error

That’s all from the Gemba.