Fixing == -> = for dash.

hammer

Index: hammer
===================================================================
--- hammer	(revision 22990)
+++ hammer	(working copy)
@@ -14,7 +14,7 @@
 while `test ! -d "${SRC_DIR}/site_scons" -o \
        -e "${SRC_DIR}/site_scons/site_tools/component_setup.py"`; do
   PARENT_DIR="$(dirname ${SRC_DIR})"
-  if `test "${SRC_DIR}" == "${PARENT_DIR}"`; then
+  if `test "${SRC_DIR}" = "${PARENT_DIR}"`; then

[Mark Mentovai, 2009/08/13 19:05:13]

The backticks aren't necessary.  Same for the "while" condition above. 
Generally, where backticks can be used (line 13), $(...) is preferred.

These days, it's more common to use [ ... ] instead of test.

On line 14, prefer

while [ ! -d ... ] || [ -e ... ] ; do

because the shell will short-circuit when you use its built-in boolean
operations.

Finally, on line 16, you're missing double-quotes around ${SRC_DIR}.  The entire
rest of the script seems to be resilient about spaces in variables, save for
that line.

     echo "ERROR: hammer must be run in a directory with site_scons under" >&2
     echo "       the root of the project tree." >&2
     exit 1