reprism/src/languages/makefile.js

Modular Syntax highlighting for the web

export default {
  language: 'makefile',
  init: Prism => {
    Prism.languages.makefile = {
      comment: {
        pattern: /(^|[^\\])#(?:\\(?:\r\n|[\s\S])|[^\\\r\n])*/,
        lookbehind: true,
      },
      string: {
        pattern: /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
        greedy: true,
      },

      // Built-in target names
      builtin: /\.[A-Z][^:#=\s]+(?=\s*:(?!=))/,

      // Targets
      symbol: {
        pattern: /^[^:=\r\n]+(?=\s*:(?!=))/m,
        inside: {
          variable: /\$+(?:[^(){}:#=\s]+|(?=[({]))/,
        },
      },
      variable: /\$+(?:[^(){}:#=\s]+|\([@*%<^+?][DF]\)|(?=[({]))/,

      keyword: [
        // Directives
        /-include\b|\b(?:define|else|endef|endif|export|ifn?def|ifn?eq|include|override|private|sinclude|undefine|unexport|vpath)\b/,
        // Functions
        {
          pattern: /(\()(?:addsuffix|abspath|and|basename|call|dir|error|eval|file|filter(?:-out)?|findstring|firstword|flavor|foreach|guile|if|info|join|lastword|load|notdir|or|origin|patsubst|realpath|shell|sort|strip|subst|suffix|value|warning|wildcard|word(?:s|list)?)(?=[ \t])/,
          lookbehind: true,
        },
      ],
      operator: /(?:::|[?:+!])?=|[|@]/,
      punctuation: /[:;(){}]/,
    }
  },
}