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selftests: forwarding: lib: Add require_command() 

The logic for testing whether a certain command is available is used
several times in the current code base. The tests in follow-up patches
add more requirements like that.

Therefore extract the logic into a named function, require_command(),
that can be used directly from lib.sh as well as from any test that
wishes to declare dependence on some command.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-07-30 16:39:46 +02:00 committed by David S. Miller
parent 778c4d5c5b
commit e094574f9b
1 changed files with 11 additions and 8 deletions
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19
tools/testing/selftests/net/forwarding/lib.sh
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@ -62,15 +62,18 @@ if [[ "$CHECK_TC" = "yes" ]]; then
check_tc_version
fi
if [[ ! -x "$(command -v jq)" ]]; then
echo "SKIP: jq not installed"
exit 1
fi
require_command()
{
local cmd=$1; shift
if [[ ! -x "$(command -v $MZ)" ]]; then
echo "SKIP: $MZ not installed"
exit 1
fi
if [[ ! -x "$(command -v "$cmd")" ]]; then
echo "SKIP: $cmd not installed"
exit 1
fi
}
require_command jq
require_command $MZ
if [[ ! -v NUM_NETIFS ]]; then
echo "SKIP: importer does not define \"NUM_NETIFS\""