84 lines
2.2 KiB
JavaScript
84 lines
2.2 KiB
JavaScript
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// Replacement for node's internal 'internal/options' module
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exports.getOptionValue = getOptionValue;
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function getOptionValue(opt) {
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parseOptions();
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return options[opt];
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}
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let options;
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function parseOptions() {
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if (!options) {
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options = {
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'--preserve-symlinks': false,
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'--preserve-symlinks-main': false,
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'--input-type': undefined,
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'--experimental-specifier-resolution': 'explicit',
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...parseArgv(getNodeOptionsEnvArgv()),
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...parseArgv(process.execArgv)
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}
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}
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}
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function parseArgv(argv) {
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return require('arg')({
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'--preserve-symlinks': Boolean,
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'--preserve-symlinks-main': Boolean,
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'--input-type': String,
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'--experimental-specifier-resolution': String
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}, {
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argv,
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permissive: true
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});
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}
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function getNodeOptionsEnvArgv() {
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const errors = [];
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const envArgv = ParseNodeOptionsEnvVar(process.env.NODE_OPTIONS || '', errors);
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if (errors.length !== 0) {
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// TODO: handle errors somehow
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}
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return envArgv;
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}
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// Direct JS port of C implementation: https://github.com/nodejs/node/blob/67ba825037b4082d5d16f922fb9ce54516b4a869/src/node_options.cc#L1024-L1063
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function ParseNodeOptionsEnvVar(node_options, errors) {
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const env_argv = [];
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let is_in_string = false;
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let will_start_new_arg = true;
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for (let index = 0; index < node_options.length; ++index) {
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let c = node_options[index];
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// Backslashes escape the following character
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if (c === '\\' && is_in_string) {
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if (index + 1 === node_options.length) {
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errors.push("invalid value for NODE_OPTIONS " +
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"(invalid escape)\n");
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return env_argv;
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} else {
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c = node_options[++index];
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}
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} else if (c === ' ' && !is_in_string) {
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will_start_new_arg = true;
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continue;
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} else if (c === '"') {
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is_in_string = !is_in_string;
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continue;
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}
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if (will_start_new_arg) {
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env_argv.push(c);
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will_start_new_arg = false;
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} else {
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env_argv[env_argv.length - 1] += c;
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}
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}
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if (is_in_string) {
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errors.push("invalid value for NODE_OPTIONS " +
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"(unterminated string)\n");
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}
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return env_argv;
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}
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