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node_modules/@mapbox/node-pre-gyp/lib/util/handle_gyp_opts.js

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+'use strict';
+
+module.exports = exports = handle_gyp_opts;
+
+const versioning = require('./versioning.js');
+const napi = require('./napi.js');
+
+/*
+
+Here we gather node-pre-gyp generated options (from versioning) and pass them along to node-gyp.
+
+We massage the args and options slightly to account for differences in what commands mean between
+node-pre-gyp and node-gyp (e.g. see the difference between "build" and "rebuild" below)
+
+Keep in mind: the values inside `argv` and `gyp.opts` below are different depending on whether
+node-pre-gyp is called directory, or if it is called in a `run-script` phase of npm.
+
+We also try to preserve any command line options that might have been passed to npm or node-pre-gyp.
+But this is fairly difficult without passing way to much through. For example `gyp.opts` contains all
+the process.env and npm pushes a lot of variables into process.env which node-pre-gyp inherits. So we have
+to be very selective about what we pass through.
+
+For example:
+
+`npm install --build-from-source` will give:
+
+argv == [ 'rebuild' ]
+gyp.opts.argv == { remain: [ 'install' ],
+  cooked: [ 'install', '--fallback-to-build' ],
+  original: [ 'install', '--fallback-to-build' ] }
+
+`./bin/node-pre-gyp build` will give:
+
+argv == []
+gyp.opts.argv == { remain: [ 'build' ],
+  cooked: [ 'build' ],
+  original: [ '-C', 'test/app1', 'build' ] }
+
+*/
+
+// select set of node-pre-gyp versioning info
+// to share with node-gyp
+const share_with_node_gyp = [
+  'module',
+  'module_name',
+  'module_path',
+  'napi_version',
+  'node_abi_napi',
+  'napi_build_version',
+  'node_napi_label'
+];
+
+function handle_gyp_opts(gyp, argv, callback) {
+
+  // Collect node-pre-gyp specific variables to pass to node-gyp
+  const node_pre_gyp_options = [];
+  // generate custom node-pre-gyp versioning info
+  const napi_build_version = napi.get_napi_build_version_from_command_args(argv);
+  const opts = versioning.evaluate(gyp.package_json, gyp.opts, napi_build_version);
+  share_with_node_gyp.forEach((key) => {
+    const val = opts[key];
+    if (val) {
+      node_pre_gyp_options.push('--' + key + '=' + val);
+    } else if (key === 'napi_build_version') {
+      node_pre_gyp_options.push('--' + key + '=0');
+    } else {
+      if (key !== 'napi_version' && key !== 'node_abi_napi')
+        return callback(new Error('Option ' + key + ' required but not found by node-pre-gyp'));
+    }
+  });
+
+  // Collect options that follow the special -- which disables nopt parsing
+  const unparsed_options = [];
+  let double_hyphen_found = false;
+  gyp.opts.argv.original.forEach((opt) => {
+    if (double_hyphen_found) {
+      unparsed_options.push(opt);
+    }
+    if (opt === '--') {
+      double_hyphen_found = true;
+    }
+  });
+
+  // We try respect and pass through remaining command
+  // line options (like --foo=bar) to node-gyp
+  const cooked = gyp.opts.argv.cooked;
+  const node_gyp_options = [];
+  cooked.forEach((value) => {
+    if (value.length > 2 && value.slice(0, 2) === '--') {
+      const key = value.slice(2);
+      const val = cooked[cooked.indexOf(value) + 1];
+      if (val && val.indexOf('--') === -1) { // handle '--foo=bar' or ['--foo','bar']
+        node_gyp_options.push('--' + key + '=' + val);
+      } else { // pass through --foo
+        node_gyp_options.push(value);
+      }
+    }
+  });
+
+  const result = { 'opts': opts, 'gyp': node_gyp_options, 'pre': node_pre_gyp_options, 'unparsed': unparsed_options };
+  return callback(null, result);
+}