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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID-Hash: 5SWXNFFI6BPYO3FOBCDDTQQQQOQSJKCG X-Message-ID-Hash: 5SWXNFFI6BPYO3FOBCDDTQQQQOQSJKCG X-MailFrom: mprivozn@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-devel.lists.libvirt.org-0; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Development discussions about the libvirt library & tools Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Michal Privoznik via Devel Reply-To: Michal Privoznik X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1768556016488158500 From: Michal Privoznik As mentioned in the previous commit, the following function doesn't echo '1' but '0': func() { local var=3D$(false) echo $? } It's explained here [1]. Since this kind of error is not easy to catch a new syntax-check rule is introduced. To avoid having multiline grep and match only those patterns where '$?' is examined, let's keep the rule simple and forbid all local declarations with subshell. 1: https://www.shellcheck.net/wiki/SC2155 Signed-off-by: Michal Privoznik --- build-aux/syntax-check.mk | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/build-aux/syntax-check.mk b/build-aux/syntax-check.mk index f605c9b0e3..ff44dfa2fe 100644 --- a/build-aux/syntax-check.mk +++ b/build-aux/syntax-check.mk @@ -394,6 +394,12 @@ sc_prohibit_g_autofree_const: halt=3D'=E2=80=98g_autofree=E2=80=99 discards =E2=80=98const=E2=80=99 qua= lifier from pointer target type' \ $(_sc_search_regexp) =20 +sc_prohibit_local_with_subshell: + @prohibit=3D'local [a-zA-Z]+=3D"?\$$\(.+' \ + in_vc_files=3D'\.sh(\.in)?$$' \ + halt=3D'local variable with subshell does not do what you think it does' \ + $(_sc_search_regexp) + =20 # Many of the function names below came from this filter: # git grep -B2 '\<_('|grep -E '\.c- *[[:alpha:]_][[:alnum:]_]* ?\(.*[,;]$'= \ --=20 2.52.0