Using base.module.sh, replaced basename and dirname

script/host/zfs/destroy-all-snapshots-before.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+source /cis/core/base.module.sh
+
+
+
+function listSnapshotsToDestroy() {
+    local _FILESYSTEM _SNAPSHOT
+    _SNAPSHOT="${1:?"Missing first parameter SNAPSHOT"}"
+    _FILESYSTEM="$(echo ${_SNAPSHOT} | cut -d@ -f1)"
+    readonly _FILESYSTEM _SNAPSHOT
+
+    for _CURRENT in $(zfs list -Ho name -s creation -t snapshot "${_FILESYSTEM:?"Missing first parameter FILESYSTEM"}")
+    do
+        [ -z "${_CURRENT}" ] \
+            && return 1
+
+        [ "${_SNAPSHOT}" == "${_CURRENT}" ] \
+            && break
+
+        echo "${_CURRENT}"
+    done
+    return 0
+}
+
+function main() {
+    local _SNAPSHOT
+    _SNAPSHOT="${1:?"Missing first parameter SNAPSHOT"}"
+    readonly _SNAPSHOT
+
+    ! echo "${_SNAPSHOT}" | grep -q "@" \
+        && echo "This is not a snapshot: ${_SNAPSHOT}" \
+        && return 1
+
+    ! zfs list "${_SNAPSHOT}" &> /dev/null \
+        && echo "The snapshot does not exist: ${_SNAPSHOT}" \
+        && return 1
+
+    listSnapshotsToDestroy "${_SNAPSHOT}" | xargs -r -p -n1 zfs destroy \
+        && return 0
+
+    return 1
+}
+
+base.set SNAPSHOT "${1}" '^[-0-9a-zA-Z_/]@[-0-9a-zA-Z_:.]'
+main "${SNAPSHOT:?"Missing first parameter SNAPSHOT"}" && exit 0
+
+echo "Something went wrong."
+exit 1
+