Re: "./t0001-init.sh --valgrind" is broken

[Jeff King <peff@peff.net>]

On Thu, Mar 03, 2016 at 07:09:12PM +0700, Duy Nguyen wrote:

> +the-other-Johannes who added valgrind support.
> 
> On Thu, Mar 3, 2016 at 1:55 PM, Johannes Sixt <j6t@kdbg.org> wrote:
> > ---- 8< ----
> > Subject: [PATCH] t0001: fix GIT_* environment variable check under --valgrind
> >
> > When a test case is run without --valgrind, the wrap-for-bin.sh
> > helper script inserts the environment variable GIT_TEXTDOMAINDIR, but
> > when run with --valgrind, the variable is missing. A recently
> > introduced test case expects the presence of the variable, though, and
> > fails under --valgrind.
> 
> Yep.
> 
> It's interesting though that valgrind sets up some variables without
> going through bin-wrappers. That's understandable because valgrind
> support is added (in 4e1be63) 10 months before bin-wrappers (in
> ea92519).  But it's probably better that we inject valgrind command
> from inside bin-wrappers script, the same way we inject gdb, I think.

I had the same thought and even started on a patch, but it doesn't quite
work. The bin-wrappers are all about intercepting what goes into the
user's $PATH, and pointing our libexec dir at the main build.

So we have "git" and "git-upload-pack" in bin-wrappers, but not
"git-log". Whereas the valgrind code wants to intercept _all_ of the
test script's invocations of git, including ones spawned by scripts,
other git commands, etc. So conceptually, it wants to intercept
$GIT_EXEC_PATH.

-Peff