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shellcheck: disable "unreachable command" check [SC2317]
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This new check in 0.9.0 appears to have some issues with various forms
of "early return", like trap, exit and return. This is tripping up (at
least):

  cmd/zed/zed.d/history_event-zfs-list-cacher.sh
  /etc/zfs/zfs-functions

Its not obvious what its complaining about or what the remedy is, so it
seems sensible to disable this check for now.

See also:

  https://www.shellcheck.net/wiki/SC2317
  koalaman/shellcheck#2542
  koalaman/shellcheck#2613

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #15089
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robn authored Jul 21, 2023
1 parent 46adb28 commit 13ec73a
Showing 1 changed file with 2 additions and 1 deletion.
3 changes: 2 additions & 1 deletion config/Shellcheck.am
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
# Not following: a was not specified as input (see shellcheck -x). [SC1091]
# Prefer putting braces around variable references even when not strictly required. [SC2250]
# Consider invoking this command separately to avoid masking its return value (or use '|| true' to ignore). [SC2312]
# Command appears to be unreachable. Check usage (or ignore if invoked indirectly). [SC2317]
# In POSIX sh, 'local' is undefined. [SC2039] # older ShellCheck versions
# In POSIX sh, 'local' is undefined. [SC3043] # newer ShellCheck versions

Expand All @@ -18,7 +19,7 @@ PHONY += shellcheck
_STGT = $(subst ^,/,$(subst shellcheck-here-,,$@))
shellcheck-here-%:
if HAVE_SHELLCHECK
shellcheck --format=gcc --enable=all --exclude=SC1090,SC1091,SC2039,SC2250,SC2312,SC3043 $$([ -n "$(SHELLCHECK_SHELL)" ] && echo "--shell=$(SHELLCHECK_SHELL)") "$$([ -e "$(_STGT)" ] || echo "$(srcdir)/")$(_STGT)"
shellcheck --format=gcc --enable=all --exclude=SC1090,SC1091,SC2039,SC2250,SC2312,SC2317,SC3043 $$([ -n "$(SHELLCHECK_SHELL)" ] && echo "--shell=$(SHELLCHECK_SHELL)") "$$([ -e "$(_STGT)" ] || echo "$(srcdir)/")$(_STGT)"
else
@echo "skipping shellcheck of" $(_STGT) "because shellcheck is not installed"
endif
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