How do I say something like HEAD-1 in svn?

Question

I want to refer to a revision just before head or n-revisions before HEAD or something like that.

In what context - to provide to a check-in hook, or just in general? — synthesizerpatel, Feb 22 '12 at 12:08
@synthesizerpatelIn the context of day-to-day use with svn client. I dunno nothing about check-in hooks ;) — Ashkan Kh. Nazary, Feb 22 '12 at 12:22

score 9 · Answer 1 · edited May 23 '17 at 12:15

There's are a few built in revision key words in Subversion which may solve most of your problems:

BASE: This is the revision used in your current working directory.
HEAD: This is the current tip of the branch.
COMMITTED: This is the last committed revision of a file before BASE.
PREV: This is the last changed revision from BASE. It's pretty much COMMITTED-1.

For everything else, you'll need to do a calculation as synthesizeerpatel showed you.

score 5 · Accepted Answer · answered Feb 22 '12 at 12:28

Long story short - you can't without running a command. With check-in hooks you can get access to 'the version before this one', otherwise you need to query it dynamically. Here's an example that populates a shell variable with the revision of the current head, minus one.

HEAD_MINUS_ONE=$(svn info http://svn/path/to/head | grep ^Revision | awk '{print $2-1}')

score 0 · Answer 3 · answered Jan 03 '19 at 23:15

0

@David W. provided part of the asnwer, but for people lazy like me. Just use

svn up -r PREV

answered Jan 03 '19 at 23:15

etiennejcharles

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How do I say something like HEAD-1 in svn?

3 Answers3