Editing Undoing-a-commit

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= Undoing an svn commit =
 
= Undoing an svn commit =
  
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Sometimes one may inadvertently commit a change that was not intended or need to revert a change made by someone else because it breaks functionality.  For example:
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Sometimes one may inadvertently commit a change that was not intended.  For example:
  
 
  $ svn ci test_vls.c
 
  $ svn ci test_vls.c
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  Sending        test_vls.c
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  ... revision: 9999
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Transmitting file data .
 
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Committed revision 9999.
 
  
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We want to "uncommit" the change.  If we don't want to lose the changes we just committed, no worries.  We can copy those file(s) to an unversioned directory '''before''' we do the merge steps below or extract  those changes at any point in the future with the "svn diff" command.  Stash the changed file(s) if desired.
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We want to "uncommit" the change.  But if we don't want to lose the changes we made, we either need to copy the changed file(s) to an unversioned directory '''before''' we do the merge or save the differences '''before''' we commit the merged changes.
  
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Do the merge (note the dot):
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First get the URL of the trunk (shortened example):
  
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  $ svn svn merge -r9999:9998 '''.'''
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$ svn info
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Path: .
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URL: https://brlcad/svnroot/trunk
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Repository Root: https://brlcad/svnroot
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Repository UUID: 2f96ce8b-6d43-0410-b8df-bffccc660ffb
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Revision: 9999
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Node Kind: directory
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Schedule: normal
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Last Changed Author: tom
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Last Changed Rev: 9999
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Last Changed Date: 2012-05-23 15:10:33 -0500 (Wed, 23 May 2012)
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Save the changed file(s) if desired.
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Do the merge:
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  $ svn svn merge -r9999:9998 https://brlcad/svnroot/trunk
 
  U  test_vls.c
 
  U  test_vls.c
  
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Check that the trunk has changed to the state before the bad commit:
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That just "merged" the commits from revision 9999 to 9998, which effectively "undoes" 9999.  Check that your trunk checkout has changed back to the state before the bad commit:
 
  
 
  $ svn diff
 
  $ svn diff
Line 25: Line 38:
 
Commit the change ('''caution''': this will undo local changes that were originally committed!):
 
Commit the change ('''caution''': this will undo local changes that were originally committed!):
  
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  $ svn commit -m "Reverting r9999 because ..."
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  $ svn commit -m "Undoing change committed in r9999."
 
  Sending        test_vls.c
 
  Sending        test_vls.c
 
  Transmitting file data .
 
  Transmitting file data .
 
  Committed revision 10000.
 
  Committed revision 10000.

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