process: add 'warning' event by jasnell · Pull Request #4782 · nodejs/node
added
semver-major
labels
Jan 20, 2016
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.
jasnell added a commit that referenced this pull request
Mar 24, 2016
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: #4782 Reviewed-By: Rod Vagg <rod@vagg.org> Reviewed-By: Wyatt Preul <wpreul@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
jasnell added a commit that referenced this pull request
Apr 26, 2016
The following significant (semver-major) changes have been made since the
previous Node v5.0.0 release.
* Buffer
* New Buffer constructors have been added
[#4682](#4682)
* Previously deprecated Buffer APIs are removed
[#5048](#5048),
[#4594](#4594)
* Improved error handling [#4514](#4514)
* Cluster
* Worker emitted as first argument in 'message' event
[#5361](#5361).
* Crypto
* Improved error handling [#3100](#3100),
[#5611](#5611)
* Simplified Certificate class bindings
[#5382](#5382)
* Improved control over FIPS mode
[#5181](#5181)
* pbkdf2 digest overloading is deprecated
[#4047](#4047)
* Dependencies
* Reintroduce shared c-ares build support
[#5775](#5775).
* V8 updated to 5.0.71.31 [#6111](#6111).
* DNS
* Add resolvePtr API to query plain DNS PTR records
[#4921](#4921).
* Domains
* Clear stack when no error handler
[#4659](#4659).
* File System
* The `fs.realpath()` and `fs.realpathSync()` methods have been updated
to use a more efficient libuv implementation. This change includes the
removal of the `cache` argument and the method can throw new errors
[#3594](#3594)
* FS apis can now accept and return paths as Buffers
[#5616](#5616).
* Error handling and type checking improvements
[#5616](#5616),
[#5590](#5590),
[#4518](#4518),
[#3917](#3917).
* fs.read's string interface is deprecated
[#4525](#4525)
* HTTP
* 'clientError' can now be used to return custom errors from an
HTTP server [#4557](#4557).
* Modules
* Current directory is now prioritized for local lookups
[#5689](#5689)
* Symbolic links are preserved when requiring modules
[#5950](#5950)
* Net
* DNS hints no longer implicitly set
[#6021](#6021).
* Improved error handling and type checking
[#5981](#5981),
[#5733](#5733),
[#2904](#2904)
* Path
* Improved type checking [#5348](#5348).
* Process
* Introduce process warnings API
[#4782](#4782).
* Throw exception when non-function passed to nextTick
[#3860](#3860).
* Readline
* Emit key info unconditionally
[#6024](#6024)
* REPL
* Assignment to `_` will emit a warning.
[#5535](#5535)
* Timers
* Fail early when callback is not a function
[#4362](#4362)
* TLS
* Rename 'clientError' to 'tlsClientError'
[#4557](#4557)
* SHA1 used for sessionIdContext
[#3866](#3866)
* TTY
* Previously deprecated setRawMode wrapper is removed
[#2528](#2528).
* Util
* Changes to Error object formatting
[#4582](#4582).
* Windows
* Windows XP and Vista are no longer supported
[#5167](#5167),
[#5167](#5167).
jasnell added a commit that referenced this pull request
Apr 26, 2016
The following significant (semver-major) changes have been made since the
previous Node v5.0.0 release.
* Buffer
* New Buffer constructors have been added
[#4682](#4682)
* Previously deprecated Buffer APIs are removed
[#5048](#5048),
[#4594](#4594)
* Improved error handling [#4514](#4514)
* Cluster
* Worker emitted as first argument in 'message' event
[#5361](#5361).
* Crypto
* Improved error handling [#3100](#3100),
[#5611](#5611)
* Simplified Certificate class bindings
[#5382](#5382)
* Improved control over FIPS mode
[#5181](#5181)
* pbkdf2 digest overloading is deprecated
[#4047](#4047)
* Dependencies
* Reintroduce shared c-ares build support
[#5775](#5775).
* V8 updated to 5.0.71.31 [#6111](#6111).
* DNS
* Add resolvePtr API to query plain DNS PTR records
[#4921](#4921).
* Domains
* Clear stack when no error handler
[#4659](#4659).
* File System
* The `fs.realpath()` and `fs.realpathSync()` methods have been updated
to use a more efficient libuv implementation. This change includes the
removal of the `cache` argument and the method can throw new errors
[#3594](#3594)
* FS apis can now accept and return paths as Buffers
[#5616](#5616).
* Error handling and type checking improvements
[#5616](#5616),
[#5590](#5590),
[#4518](#4518),
[#3917](#3917).
* fs.read's string interface is deprecated
[#4525](#4525)
* HTTP
* 'clientError' can now be used to return custom errors from an
HTTP server [#4557](#4557).
* Modules
* Current directory is now prioritized for local lookups
[#5689](#5689)
* Symbolic links are preserved when requiring modules
[#5950](#5950)
* Net
* DNS hints no longer implicitly set
[#6021](#6021).
* Improved error handling and type checking
[#5981](#5981),
[#5733](#5733),
[#2904](#2904)
* Path
* Improved type checking [#5348](#5348).
* Process
* Introduce process warnings API
[#4782](#4782).
* Throw exception when non-function passed to nextTick
[#3860](#3860).
* Readline
* Emit key info unconditionally
[#6024](#6024)
* REPL
* Assignment to `_` will emit a warning.
[#5535](#5535)
* Timers
* Fail early when callback is not a function
[#4362](#4362)
* TLS
* Rename 'clientError' to 'tlsClientError'
[#4557](#4557)
* SHA1 used for sessionIdContext
[#3866](#3866)
* TTY
* Previously deprecated setRawMode wrapper is removed
[#2528](#2528).
* Util
* Changes to Error object formatting
[#4582](#4582).
* Windows
* Windows XP and Vista are no longer supported
[#5167](#5167),
[#5167](#5167).
jasnell added a commit that referenced this pull request
Apr 26, 2016
The following significant (semver-major) changes have been made since the
previous Node v5.0.0 release.
* Buffer
* New Buffer constructors have been added
[#4682](#4682)
* Previously deprecated Buffer APIs are removed
[#5048](#5048),
[#4594](#4594)
* Improved error handling [#4514](#4514)
* Cluster
* Worker emitted as first argument in 'message' event
[#5361](#5361).
* Crypto
* Improved error handling [#3100](#3100),
[#5611](#5611)
* Simplified Certificate class bindings
[#5382](#5382)
* Improved control over FIPS mode
[#5181](#5181)
* pbkdf2 digest overloading is deprecated
[#4047](#4047)
* Dependencies
* Reintroduce shared c-ares build support
[#5775](#5775).
* V8 updated to 5.0.71.31 [#6111](#6111).
* DNS
* Add resolvePtr API to query plain DNS PTR records
[#4921](#4921).
* Domains
* Clear stack when no error handler
[#4659](#4659).
* File System
* The `fs.realpath()` and `fs.realpathSync()` methods have been updated
to use a more efficient libuv implementation. This change includes the
removal of the `cache` argument and the method can throw new errors
[#3594](#3594)
* FS apis can now accept and return paths as Buffers
[#5616](#5616).
* Error handling and type checking improvements
[#5616](#5616),
[#5590](#5590),
[#4518](#4518),
[#3917](#3917).
* fs.read's string interface is deprecated
[#4525](#4525)
* HTTP
* 'clientError' can now be used to return custom errors from an
HTTP server [#4557](#4557).
* Modules
* Current directory is now prioritized for local lookups
[#5689](#5689)
* Symbolic links are preserved when requiring modules
[#5950](#5950)
* Net
* DNS hints no longer implicitly set
[#6021](#6021).
* Improved error handling and type checking
[#5981](#5981),
[#5733](#5733),
[#2904](#2904)
* OS X
* MACOSX_DEPLOYMENT_TARGET has been bumped up to 10.7
[#6402](#6402).
* Path
* Improved type checking [#5348](#5348).
* Process
* Introduce process warnings API
[#4782](#4782).
* Throw exception when non-function passed to nextTick
[#3860](#3860).
* Readline
* Emit key info unconditionally
[#6024](#6024)
* REPL
* Assignment to `_` will emit a warning.
[#5535](#5535)
* Timers
* Fail early when callback is not a function
[#4362](#4362)
* TLS
* Rename 'clientError' to 'tlsClientError'
[#4557](#4557)
* SHA1 used for sessionIdContext
[#3866](#3866)
* TTY
* Previously deprecated setRawMode wrapper is removed
[#2528](#2528).
* Util
* Changes to Error object formatting
[#4582](#4582).
* Windows
* Windows XP and Vista are no longer supported
[#5167](#5167),
[#5167](#5167).
jasnell added a commit that referenced this pull request
Apr 26, 2016
The following significant (semver-major) changes have been made since the
previous Node v5.0.0 release.
* Buffer
* New Buffer constructors have been added
[#4682](#4682)
* Previously deprecated Buffer APIs are removed
[#5048](#5048),
[#4594](#4594)
* Improved error handling [#4514](#4514)
* Cluster
* Worker emitted as first argument in 'message' event
[#5361](#5361).
* Crypto
* Improved error handling [#3100](#3100),
[#5611](#5611)
* Simplified Certificate class bindings
[#5382](#5382)
* Improved control over FIPS mode
[#5181](#5181)
* pbkdf2 digest overloading is deprecated
[#4047](#4047)
* Dependencies
* Reintroduce shared c-ares build support
[#5775](#5775).
* V8 updated to 5.0.71.31 [#6111](#6111).
* DNS
* Add resolvePtr API to query plain DNS PTR records
[#4921](#4921).
* Domains
* Clear stack when no error handler
[#4659](#4659).
* File System
* The `fs.realpath()` and `fs.realpathSync()` methods have been updated
to use a more efficient libuv implementation. This change includes the
removal of the `cache` argument and the method can throw new errors
[#3594](#3594)
* FS apis can now accept and return paths as Buffers
[#5616](#5616).
* Error handling and type checking improvements
[#5616](#5616),
[#5590](#5590),
[#4518](#4518),
[#3917](#3917).
* fs.read's string interface is deprecated
[#4525](#4525)
* HTTP
* 'clientError' can now be used to return custom errors from an
HTTP server [#4557](#4557).
* Modules
* Current directory is now prioritized for local lookups
[#5689](#5689)
* Symbolic links are preserved when requiring modules
[#5950](#5950)
* Net
* DNS hints no longer implicitly set
[#6021](#6021).
* Improved error handling and type checking
[#5981](#5981),
[#5733](#5733),
[#2904](#2904)
* OS X
* MACOSX_DEPLOYMENT_TARGET has been bumped up to 10.7
[#6402](#6402).
* Path
* Improved type checking [#5348](#5348).
* Process
* Introduce process warnings API
[#4782](#4782).
* Throw exception when non-function passed to nextTick
[#3860](#3860).
* Readline
* Emit key info unconditionally
[#6024](#6024)
* REPL
* Assignment to `_` will emit a warning.
[#5535](#5535)
* Timers
* Fail early when callback is not a function
[#4362](#4362)
* TLS
* Rename 'clientError' to 'tlsClientError'
[#4557](#4557)
* SHA1 used for sessionIdContext
[#3866](#3866)
* TTY
* Previously deprecated setRawMode wrapper is removed
[#2528](#2528).
* Util
* Changes to Error object formatting
[#4582](#4582).
* Windows
* Windows XP and Vista are no longer supported
[#5167](#5167),
[#5167](#5167).
jasnell added a commit that referenced this pull request
Apr 26, 2016
The following significant (semver-major) changes have been made since the
previous Node v5.0.0 release.
* Buffer
* New Buffer constructors have been added
[#4682](#4682)
* Previously deprecated Buffer APIs are removed
[#5048](#5048),
[#4594](#4594)
* Improved error handling [#4514](#4514)
* Cluster
* Worker emitted as first argument in 'message' event
[#5361](#5361).
* Crypto
* Improved error handling [#3100](#3100),
[#5611](#5611)
* Simplified Certificate class bindings
[#5382](#5382)
* Improved control over FIPS mode
[#5181](#5181)
* pbkdf2 digest overloading is deprecated
[#4047](#4047)
* Dependencies
* Reintroduce shared c-ares build support
[#5775](#5775).
* V8 updated to 5.0.71.31 [#6111](#6111).
* DNS
* Add resolvePtr API to query plain DNS PTR records
[#4921](#4921).
* Domains
* Clear stack when no error handler
[#4659](#4659).
* File System
* The `fs.realpath()` and `fs.realpathSync()` methods have been updated
to use a more efficient libuv implementation. This change includes the
removal of the `cache` argument and the method can throw new errors
[#3594](#3594)
* FS apis can now accept and return paths as Buffers
[#5616](#5616).
* Error handling and type checking improvements
[#5616](#5616),
[#5590](#5590),
[#4518](#4518),
[#3917](#3917).
* fs.read's string interface is deprecated
[#4525](#4525)
* HTTP
* 'clientError' can now be used to return custom errors from an
HTTP server [#4557](#4557).
* Modules
* Current directory is now prioritized for local lookups
[#5689](#5689)
* Symbolic links are preserved when requiring modules
[#5950](#5950)
* Net
* DNS hints no longer implicitly set
[#6021](#6021).
* Improved error handling and type checking
[#5981](#5981),
[#5733](#5733),
[#2904](#2904)
* OS X
* MACOSX_DEPLOYMENT_TARGET has been bumped up to 10.7
[#6402](#6402).
* Path
* Improved type checking [#5348](#5348).
* Process
* Introduce process warnings API
[#4782](#4782).
* Throw exception when non-function passed to nextTick
[#3860](#3860).
* Readline
* Emit key info unconditionally
[#6024](#6024)
* REPL
* Assignment to `_` will emit a warning.
[#5535](#5535)
* Timers
* Fail early when callback is not a function
[#4362](#4362)
* TLS
* Rename 'clientError' to 'tlsClientError'
[#4557](#4557)
* SHA1 used for sessionIdContext
[#3866](#3866)
* TTY
* Previously deprecated setRawMode wrapper is removed
[#2528](#2528).
* Util
* Changes to Error object formatting
[#4582](#4582).
* Windows
* Windows XP and Vista are no longer supported
[#5167](#5167),
[#5167](#5167).
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters