[PATCH 01/10] check_bindir: don't use the -a or -b option with the test command

Even though POSIX.1 lists -a/-o as options to "test", they are
marked "Obsolescent XSI". Scripts using these expressions
should be converted  as follow:

test "$1" -a "$2"

should be written as:

test "$1" && test "$2"

Likewise

test "$1" -o "$2"

should be written as:

test "$1"  test "$2"

But note that, in test, -a has higher precedence than -o while
"&&" and "||" have equal precedence in the shell.

The reason for this is that the precedence rules were never well
specified, and this made many sane-looking uses of "test -a/-o" problematic.

For example, if $x is "=", these work according to POSIX (it's not
portable, but in practice it's okay):

   $ test -z "$x"
   $ test -z "$x" && test a = b

but this doesn't

   $ test -z "$x" -a a = b
   bash: test: too many arguments

because it groups "test -n = -a" and is left with "a = b".

Similarly, if $x is "-f", these

   $ test "$x"
   $ test "$x" || test c = d

correctly adds an implicit "-n", but this fails:

   $ test "$x" -o c = d
   bash: test: too many arguments

Signed-off-by: Elia Pinto <redacted>
---
Inspired from this discussion http://permalink.gmane.org/gmane.comp.version-control.git/137056

 check_bindir |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/check_bindir b/check_bindir
index a1c4c3e..623eadc 100755
--- a/check_bindir
+++ b/check_bindir

@@ -2,7 +2,7 @@
 bindir="$1"
 gitexecdir="$2"
 gitcmd="$3"
-if test "$bindir" != "$gitexecdir" -a -x "$gitcmd"
+if test "$bindir" != "$gitexecdir" && test -x "$gitcmd"
 then
 	echo
 	echo "!! You have installed git-* commands to new gitexecdir."

-- 
1.7.10.4