Commit Graph

46 Commits

Author SHA1 Message Date
Aviv Keller
71785889c8
lib: prefer logical assignment
PR-URL: https://github.com/nodejs/node/pull/55044
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: LiviaMedeiros <livia@cirno.name>
2024-10-09 06:42:16 +00:00
Aviv Keller
5c22d19f44
lib, tools: remove duplicate requires
PR-URL: https://github.com/nodejs/node/pull/54987
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
2024-09-25 08:51:28 +00:00
Antoine du Hamel
a596af0819
tools: add lint rule to keep primordials in ASCII order
PR-URL: https://github.com/nodejs/node/pull/52592
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
2024-04-21 16:53:08 +00:00
Ethan Arrowood
a0b66383f1
src: add --disable-warning option
Co-authored-by: Geoffrey Booth <webadmin@geoffreybooth.com>
Co-authored-by: Antoine du Hamel <duhamelantoine1995@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/50661
Fixes: https://github.com/nodejs/node/issues/30810
Fixes: https://github.com/nodejs/node/issues/47478
Fixes: https://github.com/nodejs/node/issues/46862
Fixes: https://github.com/nodejs/node/issues/40940
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
2023-11-21 20:30:02 +00:00
Vinicius Lourenço
dcaded006e
lib: avoid memory allocation on nodeprecation flag
PR-URL: https://github.com/nodejs/node/pull/50231
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2023-10-30 20:48:16 +00:00
Daeyeon Jeong
ada2d053ae
process: runtime deprecate coercion to integer in process.exit()
This is a follow up of doc-only deprecation
https://github.com/nodejs/node/pull/43738.

Signed-off-by: Daeyeon Jeong daeyeon.dev@gmail.com
PR-URL: https://github.com/nodejs/node/pull/44711
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2022-10-07 13:26:12 +00:00
Joyee Cheung
3611045dfc
bootstrap: clean up warning setup during serialization
PR-URL: https://github.com/nodejs/node/pull/38905
Refs: https://github.com/nodejs/node/issues/35711
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2022-08-03 00:41:42 +08:00
Rich Trott
78a2cd8624 lib: add comments to empty catch statements
PR-URL: https://github.com/nodejs/node/pull/41831
Refs: https://eslint.org/docs/rules/no-empty
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
2022-02-05 12:58:30 +00:00
Antoine du Hamel
09c9e5dea4 lib: avoid mutating Error.stackTraceLimit when it is not writable
PR-URL: https://github.com/nodejs/node/pull/38215
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
2021-04-15 00:17:16 +02:00
ZiJian Liu
08dd4b1723
lib: refactor to use validateString
PR-URL: https://github.com/nodejs/node/pull/37006
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2021-01-22 19:56:34 -08:00
Antoine du Hamel
5c3944fa20 lib,tools: enforce access to prototype from primordials
PR-URL: https://github.com/nodejs/node/pull/36025
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
2020-11-14 05:56:39 -08:00
Antoine du Hamel
1da672994a lib: use primordials when calling methods of Error
This is to unsure that code using those methods won't crash if the
methods are deleted in userland.

PR-URL: https://github.com/nodejs/node/pull/35837
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
2020-10-30 11:08:20 +00:00
Sebastien Ahkrin
b79829c5f5
lib: replace String global with primordials
PR-URL: https://github.com/nodejs/node/pull/35397
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Pranshu Srivastava <rexagod@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Ujjwal Sharma <ryzokuken@disroot.org>
2020-10-04 09:40:56 +02:00
AshCripps
242bfb6bfc
src: allow setting a dir for all diagnostic output
Add a flag that allows for the setting of a directory where all
diagnostic output will be written to.
e.g. --redirect-warnings

Refs: https://github.com/nodejs/node/pull/33010#issuecomment-618544792

PR-URL: https://github.com/nodejs/node/pull/33584
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2020-07-20 18:20:18 +02:00
Ruben Bridgewater
49745cdef0 process: delay throwing an error using throwDeprecation
This makes sure all warnings that were triggered before a deprecation
warning during the same tick are properly handled and logged.

It also guarantees that users can not catch the error anymore.

Fixes: https://github.com/nodejs/node/issues/17871

PR-URL: https://github.com/nodejs/node/pull/32312
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
2020-05-23 21:48:27 +02:00
himself65
d01a06a916 lib: simplify function process.emitWarning
PR-URL: https://github.com/nodejs/node/pull/32992
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Andrey Pechkurov <apechkurov@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2020-04-24 10:30:48 +03:00
Anna Henningsen
907ebdd76d
process: suggest --trace-warnings when printing warning
Suggest using `--trace-warnings` or `--trace-deprecation` the first
time a warning is emitted without a stack trace, similar to how
we suggest `--trace-uncaught` when printing uncaught exceptions
without a stack trace.

PR-URL: https://github.com/nodejs/node/pull/32797
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2020-04-15 02:10:53 +02:00
Rich Trott
8c18e91c8a process: remove undocumented now argument from emitWarning()
process.emitWarning() "now" option is undocumented and a Boolean trap.
Remove it before people start adopting it.

We only need it in one place internally. Replace it with an
internal-only emitWarningSync() function.

PR-URL: https://github.com/nodejs/node/pull/31643
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
2020-02-07 15:37:36 -10:00
Sebastien Ahkrin
c9b93e2344 lib: replace use of Error with primordials
PR-URL: https://github.com/nodejs/node/pull/31163
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2020-01-04 14:50:18 -08:00
Michaël Zasso
141a6e34ee
lib: enforce use of Array from primordials
PR-URL: https://github.com/nodejs/node/pull/30635
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2019-11-27 19:29:01 +01:00
Shubham Chaturvedi
a2dfa3c4e4 lib: use let instead of var
this commit uses let instead of var for util.js & warning.js
PR-URL: https://github.com/nodejs/node/pull/30375
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2019-11-26 19:42:25 +05:30
Joyee Cheung
a38e9c438a
lib: require globals instead of using the global proxy
In addition, use process.stderr instead of console.error when
there is no need to swallow the error.

PR-URL: https://github.com/nodejs/node/pull/27112
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-04-16 04:24:26 +08:00
Joyee Cheung
9dba96dc1a
process: patch more process properties during pre-execution
Delay the creation of process properties that depend on
runtime states and properties that should not be accessed
during bootstrap and patch them during pre-execution:

- process.argv
- process.execPath
- process.title
- process.pid
- process.ppid
- process.REVERT_*
- process.debugPort

PR-URL: https://github.com/nodejs/node/pull/26945
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
2019-04-04 05:14:54 +08:00
Ruben Bridgewater
3fe1e80896
lib: validate Error.captureStackTrace() calls
This adds a custom eslint rule to verify that
`Error.captureStackTrace()` is only called if necessary. In most
cases the helper function should be used instead.

PR-URL: https://github.com/nodejs/node/pull/26738
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2019-03-23 02:55:55 +01:00
Joyee Cheung
0878b6172e
process: move setup of process warnings into node.js
To clarify the side effects and conditions of the warning setup
during bootstrap.

PR-URL: https://github.com/nodejs/node/pull/25263
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
2018-12-31 15:10:00 +08:00
Ruben Bridgewater
3439c955ab process: improve --redirect-warnings handling
1) Acquiring the file descriptor is not observable anymore when using
   the `--redirect-warnings` flag.
2) If `fs.appendFile` fails, the warning is now redirected to the
   default output.
3) The code is smaller and simpler.

PR-URL: https://github.com/nodejs/node/pull/24965
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
2018-12-17 05:37:55 +01:00
Ruben Bridgewater
80ab537ee6 process: properly close file descriptor on exit
This makes sure the file descriptor is closed syncronously on exit
instead of using the asyncronous version which should not be used
on exit.

PR-URL: https://github.com/nodejs/node/pull/24972
Refs: https://github.com/nodejs/node/pull/24965/files#r240770314
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2018-12-13 23:08:44 -08:00
Joyee Cheung
e989269865 src: remove internalBinding('config').warningFile
Instead use `require('internal/options')` lazily. Also refactor the
call site a bit so that the option is queried only once since it's
synchronous anyway.

PR-URL: https://github.com/nodejs/node/pull/24959
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2018-12-13 17:21:36 -08:00
Ruben Bridgewater
a1a5c0419e lib: improve error creation performance
In case of an error where we only care about a cleaned up stack
trace it is cheaper to reset the stack trace limit for the error
that is created. That way the stack frames do not have to be
computed twice.

PR-URL: https://github.com/nodejs/node/pull/24747
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
2018-12-08 18:07:36 -08:00
Masashi Hirano
63b06551f4 src,lib: make process.binding('config') internal
PR-URL: https://github.com/nodejs/node/pull/23400
Refs: https://github.com/nodejs/node/issues/22160
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2018-12-05 11:47:05 -08:00
nakashima
acfcd78892 lib: chenged anonymous function to arrow function
PR-URL: https://github.com/nodejs/node/pull/24605
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Masashi Hirano <shisama07@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
2018-11-28 19:08:58 -08:00
Ruben Bridgewater
49681e7414
process: refactor emitWarning
Remove a couple of obsolete checks by refactoring the code with else.
Also remove the possibility of an undefined warning. That is neither
documented nor does it result in a usable warning.

PR-URL: https://github.com/nodejs/node/pull/20726
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2018-07-16 11:36:45 +02:00
Daniel Bevenius
03043e290a lib: remove unnecessary string interpolation
PR-URL: https://github.com/nodejs/node/pull/20890
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
2018-05-24 09:17:39 +02:00
Ruben Bridgewater
c6b6c92185
lib: always show ERR_INVALID_ARG_TYPE received part
This makes a effort to make sure all of these errors will actually
also show the received input.
On top of that it refactors a few tests for better maintainability.
It will also change the returned type to always be a simple typeof
instead of special handling null.

PR-URL: https://github.com/nodejs/node/pull/19445
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2018-03-25 01:45:37 +01:00
Michaël Zasso
6a9f049968
tools,lib: forbid native Error constructors
This adds a rule that forbids the use of native Error constructors in
the `lib` directory. This is to encourage use of the `internal/errors`
mechanism. The rule is disabled for errors that are not created with
the `internal/errors` module but are still assigned an error code.

PR-URL: https://github.com/nodejs/node/pull/19373
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
2018-03-21 20:15:33 +01:00
Michaël Zasso
1d2fd8b65b lib: port remaining errors to new system
PR-URL: https://github.com/nodejs/node/pull/19137
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2018-03-07 14:54:38 +01:00
Ruben Bridgewater
b55ab01b45
lib: improve lazy requires
* internal/errors - assert should already be in place when calling any
  of the message generating functions.
* No lazy load if not necessary.
* Replace function calls with `if`s.

PR-URL: https://github.com/nodejs/node/pull/14167
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
2017-07-19 15:15:44 -04:00
Brian White
fc6f487f2e
process: fix permanent deopt
PR-URL: https://github.com/nodejs/node/pull/13384
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
2017-06-05 16:44:12 -04:00
Refael Ackermann
16689e30ae inspector: --debug* deprecation and invalidation
PR-URL: https://github.com/nodejs/node/pull/12949
Fixes: https://github.com/nodejs/node/issues/12364
Fixes: https://github.com/nodejs/node/issues/12630
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
2017-05-29 11:33:59 -04:00
James M Snell
dd20e68b0f process: add optional detail to process emitWarning
Adds a new method signature variant for process.emitWarning()
that accepts an options object. The options object may include
a new `detail` option that allows additional detail text to be
associated with the warning. By default, this additional text
will be printed to stderr along with the warning, and included
on the Warning Error object using the `.detail` property.

e.g.

```js
process.emitWarning('A message', {
  code: 'WARNING123',
  detail: 'This is additional detail'
});
// Emits:
// (node {pid}) [WARNING123] Warning: A message
// This is additional detail
```

PR-URL: https://github.com/nodejs/node/pull/12725
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
2017-05-01 11:53:47 -07:00
James M Snell
e75bc87d22 errors: port internal/process errors to internal/errors
* Assign codes to the handful of errors reported by
  internal/process/*.js
* Include documentation for the new error codes
* Improve error messages
* Improve test coverage for process.nextTick

PR-URL: https://github.com/nodejs/node/pull/11294
Ref: https://github.com/nodejs/node/issues/11273
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
2017-04-20 11:34:07 -07:00
James M Snell
03e89b3ff2 process: add --redirect-warnings command line argument
The --redirect-warnings command line argument allows process warnings
to be written to a specified file rather than printed to stderr.

Also adds an equivalent NODE_REDIRECT_WARNINGS environment variable.

If the specified file cannot be opened or written to for any reason,
the argument is ignored and the warning is printed to stderr.

If the file already exists, it will be appended to.

PR-URL: https://github.com/nodejs/node/pull/10116
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Michal Zasso <targos@protonmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
2017-01-30 11:11:47 -08:00
James M Snell
5e1f32fd94 process: add optional code to warnings + type checking
Add the ability to assign an optional code to process warnings +
add additional type checking to ensure that names and codes can
only be strings.

PR-URL: https://github.com/nodejs/node/pull/10116
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Michal Zasso <targos@protonmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
2017-01-30 11:09:38 -08:00
cjihrig
49902124a9 process: add NODE_NO_WARNINGS environment variable
This commit adds support for a NODE_NO_WARNINGS environment
variable, which duplicates the functionality of the --no-warnings
command line flag.

Fixes: https://github.com/nodejs/node/issues/10802
PR-URL: https://github.com/nodejs/node/pull/10842
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
2017-01-19 09:59:37 -05:00
James M Snell
bf91035364 process: fix handling of process.noDeprecation in emitWarning
PR-URL: https://github.com/nodejs/node/pull/8166
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
2016-09-02 13:15:17 -07:00
James M Snell
c6656db352 process: add 'warning' event and process.emitWarning()
In several places throughout the code we write directly to stderr
to report warnings (deprecation, possible eventemitter memory leak).
The current design of simply dumping the text to stderr is less
than ideal. This PR introduces a new "process warnings" mechanism
that emits 'warning' events on the global process object. These are
invoked with a `warning` argument whose value is an Error object.

By default, these warnings will be printed to stderr. This can be
suppressed using the `--no-warnings` and `--no-deprecation` command
line flags. For warnings, the 'warning' event will still be emitted
by the process, allowing applications to handle the warnings in custom
ways. The existing `--no-deprecation` flag will continue to supress
all deprecation output generated by the core lib.

The `--trace-warnings` command line flag will tell Node.js to print
the full stack trace of warnings as part of the default handling.

The existing `--no-deprecation`, `--throw-deprecation` and
`--trace-deprecation` flags continue to work as they currently do,
but the exact output of the warning message is modified to occur
on process.nextTick().

The stack trace for the warnings and deprecations preserve and point
to the correct call site.

A new `process.emitWarning()` API is provided to permit userland
to emit warnings and deprecations using the same consistent
mechanism.

Test cases and documentation are included.

PR-URL: https://github.com/nodejs/node/pull/4782
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Wyatt Preul <wpreul@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
2016-03-24 13:19:11 -07:00