Add shellcheck makefile target. shellcheck when doing release.

Makefile

@@ -39,6 +39,9 @@ PYTHON_VERSION=cdist/version.py
 SPHINXM=make -C $(DOCS_SRC_DIR) man
 SPHINXH=make -C $(DOCS_SRC_DIR) html
 SPHINXC=make -C $(DOCS_SRC_DIR) clean
+
+SHELLCHECKCMD=shellcheck -s sh -f gcc -x
+SHELLCHECK_SKIP=grep -v ': __.*is referenced but not assigned.*\[SC2154\]'
 ################################################################################
 # Manpages
 #
@@ -253,3 +256,20 @@ test-remote:
 
 pep8:
 	$(helper) $@
+
+shellcheck-global-explorers:
+	@find cdist/conf/explorer -type f -exec $(SHELLCHECKCMD) {} + | $(SHELLCHECK_SKIP)
+shellcheck-manifests:
+	@find cdist/conf/type -type f -name manifest -exec $(SHELLCHECKCMD) {} + | $(SHELLCHECK_SKIP)
+
+shellcheck-local-gencodes:
+	@find cdist/conf/type -type f -name gencode-local -exec $(SHELLCHECKCMD) {} + | $(SHELLCHECK_SKIP)
+
+shellcheck-remote-gencodes:
+	@find cdist/conf/type -type f -name gencode-remote -exec $(SHELLCHECKCMD) {} + | $(SHELLCHECK_SKIP)
+
+shellcheck-gencodes: shellcheck-local-gencodes shellcheck-remote-gencodes
+
+shellcheck-types: shellcheck-manifests shellcheck-gencodes
+
+shellcheck: shellcheck-global-explorers shellcheck-types

bin/build-helper

@@ -250,6 +250,7 @@ eof
         "$0" check-date
         "$0" check-unittest
         "$0" check-pep8
+        "$0" shellcheck
 
         # Generate version file to be included in packaging
         "$0" target-version
@@ -370,7 +371,29 @@ eof
 
     check-pep8)
         "$0" pep8
-        echo "Please review pep8 report."
+        printf "\\nPlease review pep8 report.\\n"
+        while true
+        do
+            echo "Continue (yes/no)?"
+            any=
+            read any
+            case "$any" in
+                yes)
+                    break
+                ;;
+                no)
+                    exit 1
+                ;;
+                *)
+                    echo "Please answer with 'yes' or 'no' explicitly."
+                ;;
+        esac
+        done
+    ;;
+
+    shellcheck)
+        make helper=${helper} WEBDIR=${WEBDIR} shellcheck
+        printf "\\nPlease review shellcheck report.\\n"
         while true
         do
             echo "Continue (yes/no)?"

bin/build-helper.freebsd

@@ -285,6 +285,7 @@ eof
         "$0" check-date
         "$0" check-unittest
         "$0" check-pep8
+        "$0" shellcheck
 
         # Generate version file to be included in packaging
         "$0" target-version
@@ -432,7 +433,29 @@ eof
 
     check-pep8)
         "$0" pep8
-        echo "Please review pep8 report."
+        printf "\\nPlease review pep8 report.\\n"
+        while true
+        do
+            echo "Continue (yes/no)?"
+            any=
+            read any
+            case "$any" in
+                yes)
+                    break
+                ;;
+                no)
+                    exit 1
+                ;;
+                *)
+                    echo "Please answer with 'yes' or 'no' explicitly."
+                ;;
+        esac
+        done
+    ;;
+
+    shellcheck)
+        make helper=${helper} WEBDIR=${WEBDIR} shellcheck
+        printf "\\nPlease review shellcheck report.\\n"
         while true
         do
             echo "Continue (yes/no)?"