Instead of relying on $$ to not collide with an existing path.
Quoting the Bash manual about $$:
> Expands to the process ID of the shell. In a () subshell, it expands
> to the process ID of the current shell, not the subshell.
So, this is different from $BASHPID:
> Expands to the process ID of the current bash process. This differs
> from $$ under certain circumstances, such as subshells that do not
> require bash to be re-initialized.
But even $BASHPID is prone to race conditions if the process IDs wrap
around, so to be on the safe side, we're using mktemp here.
Closes#3784.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
- The option for cloning in nix-prefetch-bzr is removed
- ssl certificates are now ignored by fetchbzr
This means that no .bzr directory is downloaded. Without this change, the
hash of the result is unpredictable, probably because of timestamping in the
.bzr directory.
Currently, the only package using fetchbzr is kicad.
