Add a script and a config file to run perlcritic

This is similar to what we do to run perltidy. For now we only run at
severity level 5. Over time we can improve our perl code and reduce the
severity level.

Discussion: https://postgr.es/m/86aa2a3a-0c68-21fb-9560-84ad6914d561@2ndQuadrant.com

2 files changed, 42 insertions, 0 deletions

diff --git a/src/tools/pgperlcritic/perlcriticrc b/src/tools/pgperlcritic/perlcriticrc
new file mode 100644
index 00000000000..1059002ad50
--- /dev/null
+++ b/src/tools/pgperlcritic/perlcriticrc
@@ -0,0 +1,14 @@
+######################################################################
+#
+# src/tools/pgperlcritic/perlcriticrc
+#
+# config  file for perlcritic for Postgres project
+#
+#####################################################################
+
+severity = 5
+
+theme = core
+
+# allow octal constants with leading zeros
+[-ValuesAndExpressions::ProhibitLeadingZeros]
diff --git a/src/tools/pgperlcritic/pgperlcritic b/src/tools/pgperlcritic/pgperlcritic
new file mode 100755
index 00000000000..40d006bef6e
--- /dev/null
+++ b/src/tools/pgperlcritic/pgperlcritic
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# src/tools/pgperlcritic/pgperlcritic
+
+test -f src/tools/pgperlcritic/perlcriticrc || {
+	echo could not find src/tools/pgperlcritic/perlcriticrc
+	exit 1
+	}
+
+set -e
+
+# set this to override default perlcritic program:
+PERLCRITIC=${PERLCRITIC:-perlcritic}
+
+# locate all Perl files in the tree
+{
+	# take all .pl and .pm files
+	find . -type f -a \( -name '*.pl' -o -name '*.pm' \) -print
+	# take executable files that file(1) thinks are perl files
+	find . -type f -perm -100 -exec file {} \; -print |
+	egrep -i ':.*perl[0-9]*\>' |
+	cut -d: -f1
+} |
+sort -u |
+xargs $PERLCRITIC \
+	  --quiet \
+	  --program-extensions .pl \
+	  --profile=src/tools/pgperlcritic/perlcriticrc