Thanks to @GMartigny, @BendingBender, @tomsotte, @ammarbinfaisal, @zokker13, @stroncium, @satyarohith, @bradfordlemley, @coreyfarrell, @brandon93s, @dtinth, @papb for the great features and bug fixes they've contributed!

Please check the Medium article about this release!

Breaking changes

• Drop support for Node.js 6 (dce22670, #221)
• Remove execa.shell() and execa.shellSync(). The shell option should be used instead. (#219)
• Remove execa.stdout() and execa.stderr(). childProcessResult.stdout and childProcessResult.stderr should be used instead (#234)
• Remove error.code (number or string) in favor of error.exitCode (number) and error.exitCodeName (string) (#187, #250)
• Rename stripeEof option to stripFinalNewline (f8397ba9, 4d0dc88a, #238)
• Rename cmd (in childProcessResult and error) to command (#194)
• Default preferLocal option to false. If you are executing locally installed binaries, you'll need to manually specify preferLocal: true (#314)
• Ensure windowsHide option is always true, so that no window pops up on Windows. (8c886452)
• error.signal is now undefined instead of null when no signal was used (#193)
• Set error.killed to false when child process timed out (#227)
• Make error.killed always boolean (not undefined) (#229, #248)
• Ensure errors always have the same shape. (#276, #277, #283)
• error.stdout and error.stderr are now an empty string (instead of null) when the command failed. (#246)

Features

• Add TypeScript definition (#188, f2cb86ff, 7702b8ef, 4692dcd4, #251)
• Add execa.command() and execa.commandSync(). Those are the same as execa() except both file and arguments are specified in a single string. For example, execa('echo', ['unicorns']) is the same as execa.command('echo unicorns') (#182, #261, #262, #278, #279, #282)
• Retrieve interleaved stdout and stderr with childProcess.all and childProcessResult.all (#171, #264)
• Add execa.node() which (like child_process.fork()) allows you to execute a Node.js script as a child process (#200, #297, #299, #302, #303, #305, #306).
• If childProcess.kill() does not terminate a child process after 5 seconds, force it by sending SIGKILL. This can be configured using the forceKillAfterTimeout option. (#208, #272, #273, #280, #284, #285)
• Add childProcess.cancel() and error.isCanceled (#189, f24e7c72, #226, #309)
• error.stdout, error.stderr and error.all now contain the data that was sent before the child process exit. (#271)
• Improve error.message on child process failure (#180, #223, #230, #245, #269)
• Add .finally() to the child process promise (#174, 65139849)
• Increase maxBuffer option default value from 10 MB to 100 MB (#286)

Bug fixes

• Fix timeout option not working as expected (#199)
• Fix error.timedOut not working with execa.sync() (#249)
• Fix maxBuffer errors not using the same shape as the other errors (#266)
• Fix extendEnd option not working with shell option (#184)
• Fix stripFinalNewline option not applied on error properties (#240)
• Fix /q parameter not added when using cmd instead of cmd.exe (#203)
• Fix uncaught exception when using input option with a non-executable file (#212, #258)
• Fix errors on child processes waiting for stdout/stderr to complete (#270)
• Fix validating that the stdio option cannot be used together with stdin: 0 (#301).

Documentation

• Improve documentation (#158, #235, #237, #239, #241, #256)

Design

• Add a logo (#201)

Tests

• Fix various tests (f185a0e8, #185, #215, #216, #224, #218, #225, #231, #233, #247, #300)

Maintainers

• Add @ehmicky as an additional maintainer.