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POPass a full bash script line to another bash function to execute
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  1. POPass a full bash script line to another bash function to execute
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    copied!<p>in the BASH code below, the variable ECHO_ALL is a global and set to either 'yes' or 'no' based on input parsing of options.</p> <p>--- begin of ~/scripts/util/util-optout.sh ---</p> <pre><code>######################################## # @param $@ # @return the return value from $@ # @brief A wrapper function to allow # for OPTional OUTput of any # command w/wo args ####################################### optout() { if [ ${ECHO_ALL} = 'no' ]; then "$@" 1&gt;/dev/null 2&gt;&amp;1 return $? else "$@" return $? fi } </code></pre> <p>--- end of file ---</p> <p>in another bash file I source the above util-optout.sh file and use the optout() function to allow for conditional output.. essentially allow for conditional redirection of any commands output to /dev/null to make scripts silent.</p> <p>for example in some other build script i have</p> <pre><code>source ~/scripts/util/util-optout.sh optout pushd ${ZLIB_DIR} optout rm -vf config.cache optout CC=${BUILD_TOOL_CC} ./configure ${ZLIB_CONFIGURE_OPT} --prefix=${CURR_DIR}/${INSTALL_DIR} # ^^^^^^^^^^^^^^^^^^^ # ^ this breaks my optout() command # my optout() fails when there are prefixed bash env vars set like CC=${...} before ./configure optout popd optout make -C ${ZLIB_DIR} ${ZLIB_COMPILER_OPT} all optout make -C ${ZLIB_DIR} install </code></pre> <p>for simple commands with any type of parameters after it like 'pushd' or 'rm'.. optout() works great. even the optout make -C ones work fine.</p> <p>but it gives me an error for commands that have prefix env-vars set like the optout CC=${...} ./configure ... </p> <p>utils/util-optout.sh: line 33: CC=gcc: command not found</p> <p>Is there a way to make my optout() function work for ANY possible valid bash script line.</p> <p>i know it has something to do with the use of "$@" or "$*" in my optout() function, but i have studied the bash man pages in detail and I can't make it work for all possible bash line cases.</p> <p>so far the only way to get past this limitation with my optout() is the following 3-line style; which is annoying.</p> <pre><code>export CC=${BUILD_TOOL_CC} optout ./configure ${ZLIB_CONFIGURE_OPT} --prefix=${CURR_DIR}/${INSTALL_DIR} unset CC </code></pre> <p>Any ideas on how to reduce it all back down to a single optout ... line</p>
 

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