feat: pass cwd and env context to plugins

- Allow to run semantic-release (via API) from anywhere passing the current working directory.
- Allows to simplify the tests and to run them in parallel in both the core and plugins.

lib/plugins/index.js

@@ -5,17 +5,17 @@ const PLUGINS_DEFINITIONS = require('../definitions/plugins');
 const pipeline = require('./pipeline');
 const normalize = require('./normalize');
 
-module.exports = (options, pluginsPath, logger) => {
+module.exports = ({cwd, options, logger}, pluginsPath) => {
   const errors = [];
   const plugins = Object.entries(PLUGINS_DEFINITIONS).reduce(
     (
       plugins,
       [type, {configValidator, default: def, pipelineConfig, postprocess = identity, preprocess = identity}]
     ) => {
-      let pluginConfs;
+      let pluginOpts;
 
       if (isUndefined(options[type])) {
-        pluginConfs = def;
+        pluginOpts = def;
       } else {
         const defaultPaths = castArray(def);
         // If an object is passed and the path is missing, set the default one for single plugins
@@ -26,11 +26,12 @@ module.exports = (options, pluginsPath, logger) => {
           errors.push(getError('EPLUGINCONF', {type, pluginConf: options[type]}));
           return plugins;
         }
-        pluginConfs = options[type];
+        pluginOpts = options[type];
       }
 
-      const globalOpts = omit(options, Object.keys(PLUGINS_DEFINITIONS));
-      const steps = castArray(pluginConfs).map(conf => normalize(type, pluginsPath, globalOpts, conf, logger));
+      const steps = castArray(pluginOpts).map(pluginOpt =>
+        normalize({cwd, options: omit(options, Object.keys(PLUGINS_DEFINITIONS)), logger}, type, pluginOpt, pluginsPath)
+      );
 
       plugins[type] = async input =>
         postprocess(await pipeline(steps, pipelineConfig && pipelineConfig(plugins, logger))(await preprocess(input)));