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@prantlf/railroad-diagrams

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JavaScript library and command-line tools for drawing railroad syntax diagrams to SVG.

github.com/prantlf/railroad-diagrams

prantlf/railroad-diagrams

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{"version":3,"file":"rrdlint","sources":["../rrdlint.js"],"sourcesContent":["import globSync from 'tiny-glob/sync';\nimport { readFileSync } from 'fs';\nimport { join, extname } from 'path';\nimport { safeLoad } from 'js-yaml';\nimport rr, { Diagram } from 'railroad-diagrams';\n\nconst args = process.argv;\nlet verbose = false;\nconst patterns = [];\nlet forcedInputType;\n\nfunction usage () {\n console.log(`Checks the syntax of railroad diagrams in JSON, YAML or JavaScript.\n\nUsage: rrdlint [option...] [pattern...]\n\nOptions:\n -i|--input <type> read input from json, yaml or javascript. defaults to json\n -v|--verbose print checked file names and error stacktrace\n -V|--version print version number\n -h|--help print usage instructions\n\nIf no file name pattern is provided, standard input will be read.\nIf no input type is provided, it will be inferred from the file extension:\n\".json\" -> json, \".yaml\" or \".yml\" -> yaml, \".js\" -> javascript.\n \nExamples:\n cat foo.yaml | rrdlint -i yaml\n rrdlint diagrams/*`);\n process.exit(0);\n}\n\nif (!args.length) usage();\n\nfor (let i = 2, l = args.length; i < l; ++i) {\n const arg = args[i];\n let match;\n if ((match = /^(?:-|--)(?:(no)-)?(\\w+)$/.exec(arg))) {\n switch (match[2]) {\n case 'v': case 'verbose':\n verbose = true;\n continue;\n case 'i': case 'input':\n forcedInputType = args[++i];\n if (forcedInputType !== 'json' && forcedInputType !== 'yaml' && forcedInputType !== 'javascript') {\n console.error(`Invalid input type: \"${forcedInputType}\".`);\n process.exit(2);\n }\n continue;\n case 'V': case 'version':\n console.log(JSON.parse(readFileSync(join(\n __dirname, '../package.json'), 'utf-8')).version);\n process.exit(0);\n continue;\n case 'h': case 'help':\n usage();\n }\n console.error(`Unknown option: \"${match[0]}\".`);\n process.exit(2);\n }\n patterns.push(arg);\n}\n\nif (patterns.length) {\n for (const pattern of patterns) {\n const names = globSync(pattern, { filesOnly: true });\n for (const name of names) {\n let inputType;\n if (forcedInputType === undefined) {\n const ext = extname(name);\n switch (ext) {\n case '.json': inputType = 'json'; break;\n case '.yml': case '.yaml': inputType = 'yaml'; break;\n case '.js': inputType = 'javascript';\n }\n } else {\n inputType = forcedInputType;\n }\n run({ name, code: readFileSync(name, 'utf-8') }, inputType);\n }\n }\n}\n\nfunction run (source, inputType) {\n try {\n switch (inputType) {\n case 'javascript':\n fromJavaScript(source.code); break;\n case 'yaml':\n Diagram.fromJSON(safeLoad(source.code)); break;\n case 'json':\n default:\n Diagram.fromJSON(JSON.parse(source.code));\n }\n if (verbose) console.log(`${source.name}: OK`);\n } catch (error) {\n console.error(`${source.name}: ${error.message}`);\n if (verbose) console.log(error.stack);\n process.exitCode = 1;\n }\n}\n\nfunction fromJavaScript (input) {\n global.rr = rr;\n const diagramFunctions = `const { ${Object.keys(rr).join(', ')} } = rr;`;\n const createDiagram = new Function(`${diagramFunctions}\n${input}`);\n createDiagram();\n}\n\nif (!patterns.length) {\n let input = '';\n process.stdin.setEncoding('utf8');\n process.stdin\n .on('data', chunk => (input += chunk))\n .on('end', () => {\n run({ name: 'snippet', code: input }, forcedInputType);\n })\n 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