How to auto-remove trailing whitespace in Eclipse

Question

The question has two parts  one of which I already have the answer for    How to auto-remove trailing whitespace from the entire file being edited  -  Answer  use the AnyEdit plugin  which can be set to do that on any save to the file  How to auto-remove trailing whitespace only from the lines I changed  -  This I don t know and would appreciate any help

User · Answer

PyDev can do it by either Ctrl Shift F if you have code formatter option set to do it  or by during saving   Eclipse -  Window -  Preferences -  PyDev -  Editor -  Code Style -  Code Formatter   I use at least these    Auto format before saving Right trim lines  Add new line at end of file

User · Answer

I would say AnyEdit too  It does not provide this specific functionalities  However  if you and your team use the AnyEdit features at each save actions  then when you open a file  it must not have any trailing whitespace   So  if you modify this file  and if you add new trailing spaces  then during the save operation  AnyEdit will remove only these new spaces  as they are the only trailing spaces in this file   If  for some reasons  you need to keep the trailing spaces on the lines that were not modified by you  then I have no answer for you  and I am not sure this kind of feature exists in any Eclipse plugin

User · Answer

Removing whitespace from the entire file being edited    Preferences -  Java -  Editors -  Save Actions -  check Perform the selected actions on save -  check Additional actions -  click Configure   -  go to Code organizing tab -  check Remove trailing whitespace -  select All lines    Removing whitespace only from the lines I changed    Preferences -  Java -  Editor -  Save Actions -  check  Perform the selected actions on save -  check Format source code -  select Format edited lines   Note it is not necessary to click Configure the formatter settings on the Formatter page - all the code styles automatically include removing trailing whitespace  At least I couldn t find a setting for this in Formatter configuration  and it worked out of the box for built-in Java Conventions  Eclipse  Eclipse 2 1 styles  as well as GoogleStyle   When using this set-up  you obviously need to also turn off the solution to part 1 of the question   Eclipse version checked  4 5 2  4 11

User · Answer

You can map a key in Eclipse to manually remove trailing whitespaces in the whole file  but only on request instead of automatically at save   Preference Keys and then map a set of keys to File Remove Trailing Whitespace  This can be useful if you want to sanitize all new files  but keep legacy code untouched   Another strategy is to activate visual display of whitespace  so at least you ll know when you re adding some trailing whitespace  As far as I know  there s no way to display only trailing whitespace though  but I ll be glad to be proved wrong

User · Answer

I assume your questions is with regards to Java code  If that s the case  you don t actually need any extra plugins to accomplish 1   You can just go to Preferences -  Java -  Editor -  Save Actions and configure it to remove trailing whitespace   By the sounds of it you also want to make this a team-wide setting  right   To make life easier and avoid having to remember setting it up every time you have a new workspace you can set the save action as a project specific preference that gets stored into your SCM along with the code   In order to do that right-click on your project and go to Properties -  Java Editor -  Save Actions   From there you can enable project specific settings and configure it to remove trailing whitespace  among other useful things    NB  This option has been removed in Eclipse Kepler  4 3  and following releases   NB  2  The option seems to be back in Eclipse Luna - Luna Service Release 1a  4 4 1

User · Answer

Do following   Preferences -  Java -  Editor -  Save Actions

User · Answer

In a pinch  for those editors that don t support removal of trailing whitespace at all  e g  the XML editor   you can remove it from all lines by doing a find and replace  enabling regular expressions  then finding    t      and replacing it with     blank    There s probably a better regex to do that but it works for me without needing to install AnyEdit

User · Answer

For php there is also an option

User · Answer

There is a really easy way to do this with sed  the Unix command line tool   You could probably create a macro in Eclipse to run this   sed -i  s    space          lt filename gt

User · Answer

I used this command for git  git config --global core whitespace cr-at-eol  It removes  M characters that are trailing

User · Answer

You don t need any plugin to do so  For instance  if you code JAVA  you can erase trailing whitespaces configuring save actions   Eclipse 3 6  Preferences -  Java -  Editors -  Save Actions -  Check Perform the selected actions on save -  Check Additional actions -  Click the Configure   button   In the Code organizing tab  check Remove trailing whitespace

User · Answer

As  Malvineous said  It s not professional but a work-around to use the Find Replace method to remove trailing space  below including tab U 0009 and whitespace U 0020   Just press Ctrl   F  or command   F    Find   t    t     Replace with blank string Use Regular expressions Replace All   extra  For removing leading space  find    t    t    instead of   t    t     For removing blank lines  find   s   r  n

User · Answer

It is impossible to do it in Eclipse in generic way right now  but it can be changed given with basic Java knowledge and some free time to add basic support for this https   bugs eclipse org bugs show bug cgi id 180349  The dependent issue  https   bugs eclipse org bugs show bug cgi id 311173

User · Answer

I am not aware of any solution for the second part of your question  The reason is that it is not clear how to define I changed  Changed when  Just between 2 saves or between commits    Basically - forget it   I assume you would like to stick to some guideline  but do not touch the rest of the code  But the guideline should be used overall  and not for bites and pieces  So my suggestion is - change all the code to the guideline  it is once-off operation  but make sure that all your developers have the same plugin  AnyEdit  with the same settings for the project

[eclipse] How to auto-remove trailing whitespace in Eclipse?

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