Re: git status / git diff -C not detecting file copy

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Pol,

By default, -C only finds copies when the source file was also
modified in the same commit. Since you did not modify hello.txt in the
same commit where you copied it to copied.txt, it will not be
considered.

If you pass -C -C (twice), or use --find-copies-harder, Git will
consider all files in the repository. Note that this can be slower,
which is the reason why it's not the default.

The documentation for git diff describes the -C (--find-copies) and
--find-copies-harder flags and their limitations.

Hope this helps,
Bryan Turner

On Sun, Nov 30, 2014 at 11:35 AM, Pol Online <info@xxxxxxxxxxxxxx> wrote:
> Hi,
>
> The documentation for git status at http://git-scm.com/docs/git-status
> implies that it should be able to detect both renames and copies (with
> the R and C states). The command git diff -C should do it as well.
>
> However I can't get either to detect copies in this simple test case -
> what is happening?
>
>
> mkdir test
> cd test/
> git init
> echo 'Hello World!' > hello.txt
> echo 'Goodbye World!' > goodbye.txt
> git add -A
> git commit -m "Initial commit"
>
> cp hello.txt copied.txt
> mv goodbye.txt moved.txt
> git add -A
>
> $ git status --short
> A  copied.txt  <------------ NO COPY DETECTED
> R  goodbye.txt -> moved.txt
>
> $ git diff -M -C --summary --cached
>  create mode 100644 copied.txt  <------------ NO COPY DETECTED
>  rename goodbye.txt => moved.txt (100%)
>
> $ git commit -m Test
> $ git diff -M -C --summary HEAD~
>   create mode 100644 copied.txt  <------------ NO COPY DETECTED
>   rename goodbye.txt => moved.txt (100%)
>
>
> -Pol
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