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check_format: Ignore shellcheck's SC2128 and SC2178 directives
These are currently prone to false-positives especially in terms of
scoping. Consider the following:
foo() {
local bar=(42)
echo "${bar[*]}"
}
bar=43
foo
echo "$bar"
Some versions of shellcheck, including the latest, 0.7.2, complain
about $bar being reused as a plain string here. This is incorrect
since foo() holds its own copy of bar[@] hence the assignment which
takes place outside of it doesn't affect its content.
SC2178 can be mitigated be reversing the order of declaration:
bar=43
foo() { ... }
...
but the SC2128 still remains.
Currently, in our code majority of these warnings are coming from
false-positives due to initial source'ing which most of our test
scripts do (e.g. they fetch a function where local bar=() is used
and in the test itself $bar happens to be assigned a plain string.
This is still valid code).
To mitigate, disable these directives untill shellcheck is capable
of properly interpreting scoping when checking them.
Signed-off-by: 
Michal Berger <michalx.berger@intel.com>
Change-Id: Ifbde973eae6e261d79e1c340eb28644bce5f4e45
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8503
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>