function getErrorSource(error) {
var match = /\n at [^(]+ \((.*):(\d+):(\d+)\)/.exec(error.stack);
if (match) {
var source = match[1];
var line = +match[2];
var column = +match[3];
// Support the inline sourceContents inside the source map
var contents = fileContentsCache[source];
// Support files on disk
if (!contents && fs && fs.existsSync(source)) {
contents = fs.readFileSync(source, 'utf8');
}
// Format the line from the original source code like node does
if (contents) {
var code = contents.split(/(?:\r\n|\r|\n)/)[line - 1];
if (code) {
return source + ':' + line + '\n' + code + '\n' +
new Array(column).join(' ') + '^';
}
}
}
return null;
}...
it('specifically requested error source', function(done) {
compareStdout(done, createSecondLineSourceMap(), [
'',
'function foo() { throw new Error("this is the error"); }',
'var sms = require("./source-map-support");',
'sms.install({ handleUncaughtExceptions: false });',
'process.on("uncaughtException", function (e) { console.log("SRC:" + sms.getErrorSource(e)); });',
'process.nextTick(foo);'
], [
/^SRC:.*[/\\].original.js:1$/,
'this is the original code',
'^'
]);
});
...install = function (options) {
options = options || {};
if (options.environment) {
environment = options.environment;
if (["node", "browser", "auto"].indexOf(environment) === -1) {
throw new Error("environment " + environment + " was unknown. Available options are {auto, browser, node}")
}
}
// Allow sources to be found by methods other than reading the files
// directly from disk.
if (options.retrieveFile) {
if (options.overrideRetrieveFile) {
retrieveFileHandlers.length = 0;
}
retrieveFileHandlers.unshift(options.retrieveFile);
}
// Allow source maps to be found by methods other than reading the files
// directly from disk.
if (options.retrieveSourceMap) {
if (options.overrideRetrieveSourceMap) {
retrieveMapHandlers.length = 0;
}
retrieveMapHandlers.unshift(options.retrieveSourceMap);
}
// Support runtime transpilers that include inline source maps
if (options.hookRequire && !isInBrowser()) {
var Module;
try {
Module = require('module');
} catch (err) {
// NOP: Loading in catch block to convert webpack error to warning.
}
var $compile = Module.prototype._compile;
if (!$compile.__sourceMapSupport) {
Module.prototype._compile = function(content, filename) {
fileContentsCache[filename] = content;
sourceMapCache[filename] = undefined;
return $compile.call(this, content, filename);
};
Module.prototype._compile.__sourceMapSupport = true;
}
}
// Configure options
if (!emptyCacheBetweenOperations) {
emptyCacheBetweenOperations = 'emptyCacheBetweenOperations' in options ?
options.emptyCacheBetweenOperations : false;
}
// Install the error reformatter
if (!errorFormatterInstalled) {
errorFormatterInstalled = true;
Error.prepareStackTrace = prepareStackTrace;
}
if (!uncaughtShimInstalled) {
var installHandler = 'handleUncaughtExceptions' in options ?
options.handleUncaughtExceptions : true;
// Provide the option to not install the uncaught exception handler. This is
// to support other uncaught exception handlers (in test frameworks, for
// example). If this handler is not installed and there are no other uncaught
// exception handlers, uncaught exceptions will be caught by node's built-in
// exception handler and the process will still be terminated. However, the
// generated JavaScript code will be shown above the stack trace instead of
// the original source code.
if (installHandler && hasGlobalProcessEventEmitter()) {
uncaughtShimInstalled = true;
shimEmitUncaughtException();
}
}
}...
```
$ npm install source-map-support
```
Source maps can be generated using libraries such as [source-map-index-generator](https://github.com/twolfson/source-map-index-generator
). Once you have a valid source map, insert the following line at the top of your compiled code:
```js
require('source-map-support').install();
```
And place a source mapping comment somewhere in the file (usually done automatically or with an option by your transpiler):
```
//# sourceMappingURL=path/to/source.map
```
...function mapSourcePosition(position) {
var sourceMap = sourceMapCache[position.source];
if (!sourceMap) {
// Call the (overrideable) retrieveSourceMap function to get the source map.
var urlAndMap = retrieveSourceMap(position.source);
if (urlAndMap) {
sourceMap = sourceMapCache[position.source] = {
url: urlAndMap.url,
map: new SourceMapConsumer(urlAndMap.map)
};
// Load all sources stored inline with the source map into the file cache
// to pretend like they are already loaded. They may not exist on disk.
if (sourceMap.map.sourcesContent) {
sourceMap.map.sources.forEach(function(source, i) {
var contents = sourceMap.map.sourcesContent[i];
if (contents) {
var url = supportRelativeURL(sourceMap.url, source);
fileContentsCache[url] = contents;
}
});
}
} else {
sourceMap = sourceMapCache[position.source] = {
url: null,
map: null
};
}
}
// Resolve the source URL relative to the URL of the source map
if (sourceMap && sourceMap.map) {
var originalPosition = sourceMap.map.originalPositionFor(position);
// Only return the original position if a matching line was found. If no
// matching line is found then we return position instead, which will cause
// the stack trace to print the path and line for the compiled file. It is
// better to give a precise location in the compiled file than a vague
// location in the original file.
if (originalPosition.source !== null) {
originalPosition.source = supportRelativeURL(
sourceMap.url, originalPosition.source);
return originalPosition;
}
}
return position;
}n/a
retrieveSourceMap = function (arg) {
for (var i = 0; i < list.length; i++) {
var ret = list[i](arg);
if (ret) {
return ret;
}
}
return null;
}n/a
function wrapCallSite(frame) {
if(frame.isNative()) {
return frame;
}
// Most call sites will return the source file from getFileName(), but code
// passed to eval() ending in "//# sourceURL=..." will return the source file
// from getScriptNameOrSourceURL() instead
var source = frame.getFileName() || frame.getScriptNameOrSourceURL();
if (source) {
var line = frame.getLineNumber();
var column = frame.getColumnNumber() - 1;
// Fix position in Node where some (internal) code is prepended.
// See https://github.com/evanw/node-source-map-support/issues/36
if (line === 1 && !isInBrowser() && !frame.isEval()) {
column -= 62;
}
var position = mapSourcePosition({
source: source,
line: line,
column: column
});
frame = cloneCallSite(frame);
frame.getFileName = function() { return position.source; };
frame.getLineNumber = function() { return position.line; };
frame.getColumnNumber = function() { return position.column + 1; };
frame.getScriptNameOrSourceURL = function() { return position.source; };
return frame;
}
// Code called using eval() needs special handling
var origin = frame.isEval() && frame.getEvalOrigin();
if (origin) {
origin = mapEvalOrigin(origin);
frame = cloneCallSite(frame);
frame.getEvalOrigin = function() { return origin; };
return frame;
}
// If we get here then we were unable to change the source position
return frame;
}n/a
function getErrorSource(error) {
var match = /\n at [^(]+ \((.*):(\d+):(\d+)\)/.exec(error.stack);
if (match) {
var source = match[1];
var line = +match[2];
var column = +match[3];
// Support the inline sourceContents inside the source map
var contents = fileContentsCache[source];
// Support files on disk
if (!contents && fs && fs.existsSync(source)) {
contents = fs.readFileSync(source, 'utf8');
}
// Format the line from the original source code like node does
if (contents) {
var code = contents.split(/(?:\r\n|\r|\n)/)[line - 1];
if (code) {
return source + ':' + line + '\n' + code + '\n' +
new Array(column).join(' ') + '^';
}
}
}
return null;
}...
it('specifically requested error source', function(done) {
compareStdout(done, createSecondLineSourceMap(), [
'',
'function foo() { throw new Error("this is the error"); }',
'var sms = require("./source-map-support");',
'sms.install({ handleUncaughtExceptions: false });',
'process.on("uncaughtException", function (e) { console.log("SRC:" + sms.getErrorSource(e)); });',
'process.nextTick(foo);'
], [
/^SRC:.*[/\\].original.js:1$/,
'this is the original code',
'^'
]);
});
...install = function (options) {
options = options || {};
if (options.environment) {
environment = options.environment;
if (["node", "browser", "auto"].indexOf(environment) === -1) {
throw new Error("environment " + environment + " was unknown. Available options are {auto, browser, node}")
}
}
// Allow sources to be found by methods other than reading the files
// directly from disk.
if (options.retrieveFile) {
if (options.overrideRetrieveFile) {
retrieveFileHandlers.length = 0;
}
retrieveFileHandlers.unshift(options.retrieveFile);
}
// Allow source maps to be found by methods other than reading the files
// directly from disk.
if (options.retrieveSourceMap) {
if (options.overrideRetrieveSourceMap) {
retrieveMapHandlers.length = 0;
}
retrieveMapHandlers.unshift(options.retrieveSourceMap);
}
// Support runtime transpilers that include inline source maps
if (options.hookRequire && !isInBrowser()) {
var Module;
try {
Module = require('module');
} catch (err) {
// NOP: Loading in catch block to convert webpack error to warning.
}
var $compile = Module.prototype._compile;
if (!$compile.__sourceMapSupport) {
Module.prototype._compile = function(content, filename) {
fileContentsCache[filename] = content;
sourceMapCache[filename] = undefined;
return $compile.call(this, content, filename);
};
Module.prototype._compile.__sourceMapSupport = true;
}
}
// Configure options
if (!emptyCacheBetweenOperations) {
emptyCacheBetweenOperations = 'emptyCacheBetweenOperations' in options ?
options.emptyCacheBetweenOperations : false;
}
// Install the error reformatter
if (!errorFormatterInstalled) {
errorFormatterInstalled = true;
Error.prepareStackTrace = prepareStackTrace;
}
if (!uncaughtShimInstalled) {
var installHandler = 'handleUncaughtExceptions' in options ?
options.handleUncaughtExceptions : true;
// Provide the option to not install the uncaught exception handler. This is
// to support other uncaught exception handlers (in test frameworks, for
// example). If this handler is not installed and there are no other uncaught
// exception handlers, uncaught exceptions will be caught by node's built-in
// exception handler and the process will still be terminated. However, the
// generated JavaScript code will be shown above the stack trace instead of
// the original source code.
if (installHandler && hasGlobalProcessEventEmitter()) {
uncaughtShimInstalled = true;
shimEmitUncaughtException();
}
}
}...
```
$ npm install source-map-support
```
Source maps can be generated using libraries such as [source-map-index-generator](https://github.com/twolfson/source-map-index-generator
). Once you have a valid source map, insert the following line at the top of your compiled code:
```js
require('source-map-support').install();
```
And place a source mapping comment somewhere in the file (usually done automatically or with an option by your transpiler):
```
//# sourceMappingURL=path/to/source.map
```
...function mapSourcePosition(position) {
var sourceMap = sourceMapCache[position.source];
if (!sourceMap) {
// Call the (overrideable) retrieveSourceMap function to get the source map.
var urlAndMap = retrieveSourceMap(position.source);
if (urlAndMap) {
sourceMap = sourceMapCache[position.source] = {
url: urlAndMap.url,
map: new SourceMapConsumer(urlAndMap.map)
};
// Load all sources stored inline with the source map into the file cache
// to pretend like they are already loaded. They may not exist on disk.
if (sourceMap.map.sourcesContent) {
sourceMap.map.sources.forEach(function(source, i) {
var contents = sourceMap.map.sourcesContent[i];
if (contents) {
var url = supportRelativeURL(sourceMap.url, source);
fileContentsCache[url] = contents;
}
});
}
} else {
sourceMap = sourceMapCache[position.source] = {
url: null,
map: null
};
}
}
// Resolve the source URL relative to the URL of the source map
if (sourceMap && sourceMap.map) {
var originalPosition = sourceMap.map.originalPositionFor(position);
// Only return the original position if a matching line was found. If no
// matching line is found then we return position instead, which will cause
// the stack trace to print the path and line for the compiled file. It is
// better to give a precise location in the compiled file than a vague
// location in the original file.
if (originalPosition.source !== null) {
originalPosition.source = supportRelativeURL(
sourceMap.url, originalPosition.source);
return originalPosition;
}
}
return position;
}n/a
retrieveSourceMap = function (arg) {
for (var i = 0; i < list.length; i++) {
var ret = list[i](arg);
if (ret) {
return ret;
}
}
return null;
}n/a
function wrapCallSite(frame) {
if(frame.isNative()) {
return frame;
}
// Most call sites will return the source file from getFileName(), but code
// passed to eval() ending in "//# sourceURL=..." will return the source file
// from getScriptNameOrSourceURL() instead
var source = frame.getFileName() || frame.getScriptNameOrSourceURL();
if (source) {
var line = frame.getLineNumber();
var column = frame.getColumnNumber() - 1;
// Fix position in Node where some (internal) code is prepended.
// See https://github.com/evanw/node-source-map-support/issues/36
if (line === 1 && !isInBrowser() && !frame.isEval()) {
column -= 62;
}
var position = mapSourcePosition({
source: source,
line: line,
column: column
});
frame = cloneCallSite(frame);
frame.getFileName = function() { return position.source; };
frame.getLineNumber = function() { return position.line; };
frame.getColumnNumber = function() { return position.column + 1; };
frame.getScriptNameOrSourceURL = function() { return position.source; };
return frame;
}
// Code called using eval() needs special handling
var origin = frame.isEval() && frame.getEvalOrigin();
if (origin) {
origin = mapEvalOrigin(origin);
frame = cloneCallSite(frame);
frame.getEvalOrigin = function() { return origin; };
return frame;
}
// If we get here then we were unable to change the source position
return frame;
}n/a