Split plugins

docs/scripts/plugins/01-read-initial-variables.js

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+module.exports = plugin;
+
+const utils = require('./utils');
+
+function plugin() {
+  let variables = {
+    by_name: {},
+    list: [],
+  };
+
+  return (files, metalsmith, done) => {
+    setImmediate(done);
+
+    Object.keys(files).forEach(file_path => {
+      const {file_name, lines} = utils.getLines(files, file_path);
+
+      lines.forEach(line => {
+        const variable = utils.parseLine(line);
+
+        if (variable != false) {
+          variables.by_name[variable.name] = variable;
+          variables.list.push(variable.name);
+        }
+      });
+
+      utils.writeFile(file_path, variables);
+    });
+  };
+}

docs/scripts/plugins/02-read-derived-variables.js

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+module.exports = plugin;
+
+const utils = require('./utils');
+const fs = require('fs');
+
+let initial_variables = JSON.parse(fs.readFileSync(utils.files.initial_variables));
+
+function plugin() {
+  return (files, metalsmith, done) => {
+    setImmediate(done);
+
+    Object.keys(files).forEach(file_path => {
+      let variables = {
+        by_name: {},
+        list: [],
+      };
+      const {file_name, lines} = utils.getLines(files, file_path);
+
+      lines.forEach(line => {
+        const variable = utils.parseLine(line);
+
+        if (variable != false) {
+          variable.computed_value = utils.getInitialValue(variable.value, variable.type, initial_variables);
+          variables.by_name[variable.name] = variable;
+          variables.list.push(variable.name);
+        }
+      });
+
+      utils.writeFile(file_path, variables);
+    });
+  };
+}

docs/scripts/plugins/03-read-other-variables.js

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+module.exports = plugin;
+
+const utils = require('./utils');
+const fs = require('fs');
+
+let initial_variables = JSON.parse(fs.readFileSync(utils.files.initial_variables));
+let derived_variables = JSON.parse(fs.readFileSync(utils.files.derived_variables));
+
+function plugin() {
+  return (files, metalsmith, done) => {
+    setImmediate(done);
+
+    Object.keys(files).forEach(file_path => {
+      if (file_path.startsWith('utilities')) {
+        return;
+      }
+
+      let variables = {
+        by_name: {},
+        list: [],
+      };
+      const {file_name, lines} = utils.getLines(files, file_path);
+
+      lines.forEach(line => {
+        const variable = utils.parseLine(line);
+
+        if (variable != false) {
+          variable.computed_value = utils.getComputedValue(variable.value, variable.type, initial_variables, derived_variables);
+          variables.by_name[variable.name] = variable;
+          variables.list.push(variable.name);
+        }
+      });
+
+      utils.writeFile(file_path, variables);
+    });
+  };
+}

docs/scripts/plugins/utils.js

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+const fs = require('fs');
+const path = require('path');
+
+let utils = {
+  getVariableType: (value) => {
+    if (value.startsWith('hsl')) {
+      return 'color';
+    } else if (value.startsWith('$')) {
+      return 'variable';
+    } else if (value.startsWith('BlinkMacSystemFont') || value == 'monospace') {
+      return 'font-family';
+    } else if (value == 'true' || value == 'false') {
+      return 'boolean';
+    } else if (value.includes('+')) {
+      return 'computed';
+    } else if (value.endsWith('00')) {
+      return 'font-weight';
+    } else if (value.endsWith('px') || value.endsWith('rem')) {
+      return 'size';
+    }
+
+    return 'string';
+  },
+
+  parseLine: (line) => {
+    if (line.startsWith('$') && line.endsWith('!default')) {
+      const colon_index = line.indexOf(':');
+      const variable_name = line.substring(0, colon_index).trim();
+
+      const default_index = line.indexOf('!default');
+      const variable_value = line.substring(colon_index + 1, default_index).trim();
+
+      return variable = {
+        name: variable_name,
+        value: variable_value,
+        type: utils.getVariableType(variable_value),
+      };
+    }
+
+    return false;
+  },
+
+  getLines: (files, file_path) => {
+    const file = files[file_path];
+    const slash_index = file_path.lastIndexOf('/');
+    const dot_index = file_path.lastIndexOf('.');
+    const file_name = file_path.substring(slash_index + 1, dot_index);
+
+    return {
+      file_name,
+      lines: file.contents.toString().split(/(?:\r\n|\r|\n)/g),
+    }
+  },
+
+  writeFile: (file_path, data) => {
+    const json_data = JSON.stringify(data, null, '  ');
+    const json_file_path = 'variables/' + file_path.replace('.sass', '.json');
+    utils.ensureDirectoryExistence(json_file_path);
+
+    fs.writeFile(json_file_path, json_data, err => {
+      if (err) {
+        return console.log(err);
+      }
+
+      console.log(`The file ${json_file_path} was saved!`);
+    });
+  },
+
+  getInitialValue: (value, type, initial_variables) => {
+    if (value.startsWith('$') && value in initial_variables.by_name) {
+      const second_value = initial_variables.by_name[value].value;
+
+      if (second_value.startsWith('$') && second_value in initial_variables.by_name) {
+        const third_value = initial_variables.by_name[second_value].value;
+        console.log('third_value', third_value);
+
+        return third_value;
+      }
+
+      return second_value;
+    }
+
+    return value;
+  },
+
+  getComputedValue: (value, type, initial_variables, derived_variables) => {
+    if (value.startsWith('$')) {
+      let second_value;
+
+      if (value in initial_variables.by_name) {
+        second_value = initial_variables.by_name[value].value;
+      } else if (value in derived_variables.by_name) {
+        second_value = derived_variables.by_name[value].value;
+      }
+
+      if (second_value && second_value.startsWith('$')) {
+        let third_value;
+
+        if (second_value in initial_variables.by_name) {
+          third_value = initial_variables.by_name[second_value].value;
+        } else if (second_value in derived_variables.by_name) {
+          third_value = derived_variables.by_name[second_value].value;
+        }
+
+        return third_value;
+      }
+
+      return second_value;
+    }
+
+    return value;
+  },
+
+  ensureDirectoryExistence: (file_path) => {
+    var dirname = path.dirname(file_path);
+
+    if (fs.existsSync(dirname)) {
+      return true;
+    }
+
+    utils.ensureDirectoryExistence(dirname);
+    fs.mkdirSync(dirname);
+  }
+}
+
+utils.files = {};
+utils.files.initial_variables = `./variables/utilities/initial-variables.json`;
+utils.files.derived_variables = `./variables/utilities/derived-variables.json`;
+
+module.exports = utils;