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JavaScript

'use strict';
const fs = require('fs');
module.exports = exports;
const versionArray = process.version
.substr(1)
.replace(/-.*$/, '')
.split('.')
.map((item) => {
return +item;
});
const napi_multiple_commands = [
'build',
'clean',
'configure',
'package',
'publish',
'reveal',
'testbinary',
'testpackage',
'unpublish'
];
const napi_build_version_tag = 'napi_build_version=';
module.exports.get_napi_version = function() {
// returns the non-zero numeric napi version or undefined if napi is not supported.
// correctly supporting target requires an updated cross-walk
let version = process.versions.napi; // can be undefined
if (!version) { // this code should never need to be updated
if (versionArray[0] === 9 && versionArray[1] >= 3) version = 2; // 9.3.0+
else if (versionArray[0] === 8) version = 1; // 8.0.0+
}
return version;
};
module.exports.get_napi_version_as_string = function(target) {
// returns the napi version as a string or an empty string if napi is not supported.
const version = module.exports.get_napi_version(target);
return version ? '' + version : '';
};
module.exports.validate_package_json = function(package_json, opts) { // throws Error
const binary = package_json.binary;
const module_path_ok = pathOK(binary.module_path);
const remote_path_ok = pathOK(binary.remote_path);
const package_name_ok = pathOK(binary.package_name);
const napi_build_versions = module.exports.get_napi_build_versions(package_json, opts, true);
const napi_build_versions_raw = module.exports.get_napi_build_versions_raw(package_json);
if (napi_build_versions) {
napi_build_versions.forEach((napi_build_version)=> {
if (!(parseInt(napi_build_version, 10) === napi_build_version && napi_build_version > 0)) {
throw new Error('All values specified in napi_versions must be positive integers.');
}
});
}
if (napi_build_versions && (!module_path_ok || (!remote_path_ok && !package_name_ok))) {
throw new Error('When napi_versions is specified; module_path and either remote_path or ' +
"package_name must contain the substitution string '{napi_build_version}`.");
}
if ((module_path_ok || remote_path_ok || package_name_ok) && !napi_build_versions_raw) {
throw new Error("When the substitution string '{napi_build_version}` is specified in " +
'module_path, remote_path, or package_name; napi_versions must also be specified.');
}
if (napi_build_versions && !module.exports.get_best_napi_build_version(package_json, opts) &&
module.exports.build_napi_only(package_json)) {
throw new Error(
'The Node-API version of this Node instance is ' + module.exports.get_napi_version(opts ? opts.target : undefined) + '. ' +
'This module supports Node-API version(s) ' + module.exports.get_napi_build_versions_raw(package_json) + '. ' +
'This Node instance cannot run this module.');
}
if (napi_build_versions_raw && !napi_build_versions && module.exports.build_napi_only(package_json)) {
throw new Error(
'The Node-API version of this Node instance is ' + module.exports.get_napi_version(opts ? opts.target : undefined) + '. ' +
'This module supports Node-API version(s) ' + module.exports.get_napi_build_versions_raw(package_json) + '. ' +
'This Node instance cannot run this module.');
}
};
function pathOK(path) {
return path && (path.indexOf('{napi_build_version}') !== -1 || path.indexOf('{node_napi_label}') !== -1);
}
module.exports.expand_commands = function(package_json, opts, commands) {
const expanded_commands = [];
const napi_build_versions = module.exports.get_napi_build_versions(package_json, opts);
commands.forEach((command)=> {
if (napi_build_versions && command.name === 'install') {
const napi_build_version = module.exports.get_best_napi_build_version(package_json, opts);
const args = napi_build_version ? [napi_build_version_tag + napi_build_version] : [];
expanded_commands.push({ name: command.name, args: args });
} else if (napi_build_versions && napi_multiple_commands.indexOf(command.name) !== -1) {
napi_build_versions.forEach((napi_build_version)=> {
const args = command.args.slice();
args.push(napi_build_version_tag + napi_build_version);
expanded_commands.push({ name: command.name, args: args });
});
} else {
expanded_commands.push(command);
}
});
return expanded_commands;
};
module.exports.get_napi_build_versions = function(package_json, opts, warnings) { // opts may be undefined
const log = require('npmlog');
let napi_build_versions = [];
const supported_napi_version = module.exports.get_napi_version(opts ? opts.target : undefined);
// remove duplicates, verify each napi version can actaully be built
if (package_json.binary && package_json.binary.napi_versions) {
package_json.binary.napi_versions.forEach((napi_version) => {
const duplicated = napi_build_versions.indexOf(napi_version) !== -1;
if (!duplicated && supported_napi_version && napi_version <= supported_napi_version) {
napi_build_versions.push(napi_version);
} else if (warnings && !duplicated && supported_napi_version) {
log.info('This Node instance does not support builds for Node-API version', napi_version);
}
});
}
if (opts && opts['build-latest-napi-version-only']) {
let latest_version = 0;
napi_build_versions.forEach((napi_version) => {
if (napi_version > latest_version) latest_version = napi_version;
});
napi_build_versions = latest_version ? [latest_version] : [];
}
return napi_build_versions.length ? napi_build_versions : undefined;
};
module.exports.get_napi_build_versions_raw = function(package_json) {
const napi_build_versions = [];
// remove duplicates
if (package_json.binary && package_json.binary.napi_versions) {
package_json.binary.napi_versions.forEach((napi_version) => {
if (napi_build_versions.indexOf(napi_version) === -1) {
napi_build_versions.push(napi_version);
}
});
}
return napi_build_versions.length ? napi_build_versions : undefined;
};
module.exports.get_command_arg = function(napi_build_version) {
return napi_build_version_tag + napi_build_version;
};
module.exports.get_napi_build_version_from_command_args = function(command_args) {
for (let i = 0; i < command_args.length; i++) {
const arg = command_args[i];
if (arg.indexOf(napi_build_version_tag) === 0) {
return parseInt(arg.substr(napi_build_version_tag.length), 10);
}
}
return undefined;
};
module.exports.swap_build_dir_out = function(napi_build_version) {
if (napi_build_version) {
const rm = require('rimraf');
rm.sync(module.exports.get_build_dir(napi_build_version));
fs.renameSync('build', module.exports.get_build_dir(napi_build_version));
}
};
module.exports.swap_build_dir_in = function(napi_build_version) {
if (napi_build_version) {
const rm = require('rimraf');
rm.sync('build');
fs.renameSync(module.exports.get_build_dir(napi_build_version), 'build');
}
};
module.exports.get_build_dir = function(napi_build_version) {
return 'build-tmp-napi-v' + napi_build_version;
};
module.exports.get_best_napi_build_version = function(package_json, opts) {
let best_napi_build_version = 0;
const napi_build_versions = module.exports.get_napi_build_versions(package_json, opts);
if (napi_build_versions) {
const our_napi_version = module.exports.get_napi_version(opts ? opts.target : undefined);
napi_build_versions.forEach((napi_build_version)=> {
if (napi_build_version > best_napi_build_version &&
napi_build_version <= our_napi_version) {
best_napi_build_version = napi_build_version;
}
});
}
return best_napi_build_version === 0 ? undefined : best_napi_build_version;
};
module.exports.build_napi_only = function(package_json) {
return package_json.binary && package_json.binary.package_name &&
package_json.binary.package_name.indexOf('{node_napi_label}') === -1;
};