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| #!/usr/bin/env node | |
| /*! @license MIT ©2014–2016 Ruben Verborgh, Ghent University – imec */ | |
| /* Merges the queries from the 'queries' folder into 'settings.json'. */ | |
| var fs = require('fs'), | |
| path = require('path'); | |
| var queryDir = path.join(__dirname, 'queries'), | |
| settingsFile = path.join(__dirname, 'settings.json'), | |
| outputFile = path.join(__dirname, 'queries.json'); | |
| // Write the settings with queries to the output file | |
| var settings = JSON.parse(fs.readFileSync(settingsFile, { encoding: 'utf8' })); | |
| settings.queries = readQueryDirectory(queryDir) | |
| // Sort by ascending priority and name | |
| .sort(function (a, b) { | |
| return (a.priority - b.priority) || | |
| (a.name.toLowerCase() > b.name.toLowerCase() ? 1 : -1); | |
| }) | |
| // Remove priority numbers in output | |
| .map(function (d) { return delete d.priority, d; }); | |
| fs.writeFileSync(outputFile, JSON.stringify(settings)); | |
| // Recursively reads queries in the given directory | |
| function readQueryDirectory(directory) { | |
| return [].concat.apply([], fs.readdirSync(directory).map(function (filename) { | |
| filename = path.join(directory, filename); | |
| if (fs.statSync(filename).isDirectory()) | |
| return readQueryDirectory(filename); | |
| else if (/\.(sparql)|(graphql)$/.test(filename)) | |
| return readQuery(filename); | |
| else | |
| return []; | |
| })); | |
| } | |
| // Creates a query from the file | |
| function readQuery(queryFile) { | |
| // Construct the initial query | |
| var query = { | |
| name: queryFile.replace(/^.+\/|\.\w+$/g, ''), | |
| priority: 1000, datasources: [] | |
| }; | |
| // Parse query comments for metadata | |
| var inputLines = fs.readFileSync(queryFile, {encoding: 'utf8'}).split('\n'), outputLines = []; | |
| inputLines.forEach(function (line, index) { | |
| // The line might be a key/value pair | |
| var keyValue = line.match(/^#\s*(\w+)\s*:\s*(.*)\s*/); | |
| if (keyValue) { | |
| var key = keyValue[1].toLowerCase(), value = keyValue[2]; | |
| switch (key) { | |
| case 'datasource': | |
| case 'datasources': | |
| value.split(/\s+/) | |
| .forEach(function (d) { | |
| if (d.length) query.datasources.push(d); | |
| }); | |
| return; | |
| } | |
| } | |
| // The first line might contain a name | |
| if (index === 0 && line[0] === '#') { | |
| query.name = line.replace(/#\s*/, ''); | |
| // A number preceding the name indicates the priority | |
| if (/^\d/.test(query.name)) { | |
| query.priority = parseInt(query.name, 10); | |
| query.name = query.name.replace(/^\d+\W\s*/, ''); | |
| } | |
| } | |
| // Any other line is part of the query | |
| else { | |
| outputLines.push(line); | |
| } | |
| }); | |
| // Depending on the file name, assume a different query format | |
| if (queryFile.endsWith('graphql')) { | |
| var emptyLineIndex = outputLines.indexOf(''); | |
| if (emptyLineIndex < 0) | |
| throw new Error(queryFile + ' does not have an empty line between GraphQL query and JSON-LD context'); | |
| query.queryFormat = 'graphql'; | |
| query.query = outputLines.slice(0, emptyLineIndex).join('\n').trim(); | |
| query.context = outputLines.slice(emptyLineIndex + 1).join('\n').trim(); | |
| } | |
| else { | |
| query.queryFormat = 'sparql'; | |
| query.query = outputLines.join('\n').trim(); | |
| } | |
| // Skip disabled query formats | |
| if (!settings.queryFormats[query.queryFormat]) { | |
| return []; | |
| } | |
| return query; | |
| } |