Import LinuxCNC source tree

scripts/shellcheck.sh

@@ -0,0 +1,60 @@
+#!/bin/bash -e
+
+if ! command -v shellcheck > /dev/null; then
+    echo "E: Please install the program 'shellcheck' prior to executing this script."
+    exit 1
+fi
+
+# This script is supposed to be in the scripts subdirectory
+TOPDIR=$(realpath --relative-to=. "$(dirname "$0")/..")
+
+# Exclude tracking includes and don't complain about include paths
+SHELLCHECK_OPTS="--exclude=SC1090,SC1091"
+export SHELLCHECK_OPTS
+
+# Check if files are specified on the command line. If so, only use those.
+if [ $# -gt 0 ]; then
+    case "$1" in
+    -h|--help*)
+        cat <<EOF
+Shellcheck script to check LinuxCNC shell scripts.
+Usage: shellcheck.sh [-h|--help] [files...]
+  -h, --help   This help message
+
+Specify one or more files on the command line if you only want those files
+to be checked. The script will search all of the LinuxCNC source tree for
+shell scripts if no files are specified on the command line.
+EOF
+        exit 1
+        ;;
+    esac
+    FILES=( "$@" )
+else
+    #
+    # With the file command we can find all scripts.
+    #   Note: perform shellcheck with a distclean tree. Some scripts are
+    #   generated by configure from .in files.
+    #
+    # Without the file command we just look for script file names.
+    #
+    if [ -n "$(command -v file)" ]; then
+        mapfile -t FILES < <(find "$TOPDIR" -type f \
+                     -not -path "*/.git/*" \
+                     -not -path "*/autom4te.cache/*" \
+                     -not -name "*~" \
+                     -not -path "*/tcl/*" \
+                     -not -name "*.tcl" \
+                     -not -name "configure" \
+                     -not -name "config.guess" \
+                     -not -name "config.status" \
+                     -not -name "config.sub" \
+                     -not -name "install-sh" \
+                     -exec file {} + | awk -F: '/shell script/{print $1}')
+    else
+        mapfile -r FILES < <(find "$TOPDIR" -type f -name "*.sh")
+    fi
+fi
+
+if [ "${#FILES[@]}" -gt 0 ]; then
+    shellcheck "${FILES[@]}"
+fi