Getting old revision of renamed files

[Tom Anderson]

On 02/02/12 17:05, Nikolaus Rath wrote:
> When I want to look at a previous revision of a file, I typically use
> 'hg revert -r rev<myfile>'.

Ouch!

> This works well as long as the file has not been renamed after rev. If
> the file has been renamed, then<myfile>  will look just as before, and
> instead I will have a "new" file somewhere else in the repository.

Unless you currently have a file with the name your file used to have, 
in which case the revert will do nothing:

hg init test
cd test
echo first >red
hg add .
hg commit -m 'added first as red'
hg mv red blue
hg commit -m 'renamed red to blue'
echo second >red
hg add .
hg commit -m 'added second as red'
hg revert -r 0 blue
cat red

> So I have to go through the "hg log -f<myfile>" output to figure out where
> the revert placed the contents. In addition to that, there seems to be
> an implicit "hg add" of the old location and name of the file, so I also
> have to call "hg remove -f" to prevent re-adding the file with the old
> name.
>
> Is there a better way to do this?
>
> I first thought that "hg cat -r rev<myfile>" would do what I want, but
> this just fails with "no such file in rev " if the file had a different
> name at that point.

Sounds like a bug in hg cat to me. Is it that hg cat takes the same 
rename-ignorant approach to history that hg log does, but that it also 
lacks the -f flag that hg log can take to make it follow renames?

tom

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Tom Anderson | Developer | +44 20 7826 4312 | timgroup.com 
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