1 files changed, 78 insertions, 0 deletions
diff --git a/collectors/charts.d.plugin/charts.d.dryrun-helper.sh b/collectors/charts.d.plugin/charts.d.dryrun-helper.sh
new file mode 100755
index 00000000..67496c1b
--- /dev/null
+++ b/collectors/charts.d.plugin/charts.d.dryrun-helper.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# shellcheck disable=SC2181
+
+# will stop the script for any error
+set -e
+
+me="$0"
+name="$1"
+chart="$2"
+conf="$3"
+
+can_diff=1
+
+tmp1="$(mktemp)"
+tmp2="$(mktemp)"
+
+myset() {
+    set | grep -v "^_=" | grep -v "^PIPESTATUS=" | grep -v "^BASH_LINENO="
+}
+
+# save 2 'set'
+myset >"$tmp1"
+myset >"$tmp2"
+
+# make sure they don't differ
+diff "$tmp1" "$tmp2" >/dev/null 2>&1
+if [ $? -ne 0 ]
+then
+    # they differ, we cannot do the check
+    echo >&2 "$me: cannot check with diff."
+    can_diff=0
+fi
+
+# do it again, now including the script
+myset >"$tmp1"
+
+# include the plugin and its config
+if [ -f "$conf" ]
+then
+    # shellcheck source=/dev/null
+    . "$conf"
+    if [ $? -ne 0 ]
+    then
+        echo >&2 "$me: cannot load config file $conf"
+        rm "$tmp1" "$tmp2"
+        exit 1
+    fi
+fi
+
+# shellcheck source=/dev/null
+. "$chart"
+if [ $? -ne 0 ]
+then
+    echo >&2 "$me: cannot load chart file $chart"
+    rm "$tmp1" "$tmp2"
+    exit 1
+fi
+
+# remove all variables starting with the plugin name
+myset | grep -v "^$name" >"$tmp2"
+
+if [ $can_diff -eq 1 ]
+then
+    # check if they are different
+    # make sure they don't differ
+    diff "$tmp1" "$tmp2" >&2
+    if [ $? -ne 0 ]
+    then
+        # they differ
+        rm "$tmp1" "$tmp2"
+        exit 1
+    fi
+fi
+
+rm "$tmp1" "$tmp2"
+exit 0