Re: [edk2-devel] [PATCH] OvmfPkg/build.sh: use POSIX 'command -v' instead of 'which'.

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Rebecca,

On 7/24/19 2:49 AM, rebecca@bsdio.com wrote:
> Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
> ---
>  OvmfPkg/build.sh | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/OvmfPkg/build.sh b/OvmfPkg/build.sh
> index e94aa2a37e..1c28e65404 100755
> --- a/OvmfPkg/build.sh
> +++ b/OvmfPkg/build.sh
> @@ -174,11 +174,11 @@ case $PROCESSOR in
>        # The user set the QEMU_COMMAND variable. We'll use it to run QEMU.
>        #
>        :
> -    elif  [ -x `which qemu-system-i386` ]; then
> +    elif command -v qemu-system-i386; then
>        QEMU_COMMAND=qemu-system-i386
> -    elif  [ -x `which qemu-system-x86_64` ]; then
> +    elif command -v qemu-system-x86_64; then
>        QEMU_COMMAND=qemu-system-x86_64
> -    elif  [ -x `which qemu` ]; then
> +    elif command -v qemu; then
>        QEMU_COMMAND=qemu
>      else
>        echo Unable to find QEMU for IA32 architecture!
> @@ -242,12 +242,12 @@ FV_DIR=$BUILD_ROOT/FV
>  BUILD_ROOT_ARCH=$BUILD_ROOT/$BUILD_ROOT_ARCH
>  QEMU_FIRMWARE_DIR=$BUILD_ROOT/QEMU
>  
> -if  [[ ! -f `which build` || ! -f `which GenFv` ]];
> +if ! command -v build || ! command -v GenFv;
>  then
>    # build the tools if they don't yet exist. Bin scheme
>    echo Building tools as they are not in the path
>    make -C $WORKSPACE/BaseTools
> -elif [[ ( -f `which build` ||  -f `which GenFv` )  && ! -d  $EDK_TOOLS_PATH/Source/C/bin ]];
> +elif [[ ( $(command -v build) || $(command -v GenFv) ) && ! -d $EDK_TOOLS_PATH/Source/C/bin ]];

Why add $() ?

>  then
>    # build the tools if they don't yet exist. BinWrapper scheme
>    echo Building tools no $EDK_TOOLS_PATH/Source/C/bin directory
>