-a $HOME/.bashrc and -a ~/.bashrc produce different results

Csaba Raduly rcsaba@gmail.com
Fri May 20 07:32:00 GMT 2011


On Thu, May 19, 2011 at 11:06 PM, Eric Blake  wrote:

> "$HOME" expands $HOME, but "~/.bashrc" does _not_ expand ~.  For
> tilde-expansion to occur, it must be unquoted.

Not only that, it has to be the first character:

<quote>
3.5.2 Tilde Expansion
---------------------
If a word begins with an unquoted tilde character (`~'), ...
</endquote>

I've been bitten by this in a makefile when I wrote:

SOMETOOL := ~/sometool
CPPFLAGS += -I$(SOMETOOL)/include


and   -I~/sometool/include   was not expanded. I've made a rule to
only use ${HOME} in makefiles.

Csaba
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