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kconfig: a faster way to check the availability of python3 package

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It is faster to check the existance of a certain library by trying importing
that library, instead of invoking pip3 for a complete list of installed
libraries. Time of the check can be significantly reduced.

    # time pip3 list
    ...
    real    0m6.038s
    user    0m0.652s
    sys     0m0.036s

    # time python3 -c "import kconfiglib"
    real    0m0.037s
    user    0m0.036s
    sys     0m0.000s

Tracked-On: #1588
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Junjie Mao
2018-10-19 21:10:01 +08:00
committed by lijinxia
parent 256108f16b
commit c7907a823c
2 changed files with 1 additions and 2 deletions
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2
scripts/deps.mk
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@@ -21,7 +21,7 @@ endef
define check_dep_py3lib =
$(2) += check_py3lib_$(1)
check_py3lib_$(1):
@if ! pip3 list 2>/dev/null | grep $(1) > /dev/null 2>&1; then \
@if ! python3 -c "import $(1)" > /dev/null 2>&1; then \
echo "******** Missing prerequisite tool ********"; \
echo "The python3 library *$(1)* is not installed"; \
echo "Please refer to the Getting Started Guide" \