From a08986066df1930d17b3509ff5b8d75edf8aafad Mon Sep 17 00:00:00 2001
From: Ian Kelling <ian@iankelling.org>
Date: Fri, 11 Jul 2014 20:21:20 -0700
Subject: [PATCH] add help on argument

---
 errallow-function |  9 +++++++--
 errcatch-function | 15 +++++++++------
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/errallow-function b/errallow-function
index fb00d95..d44247b 100644
--- a/errallow-function
+++ b/errallow-function
@@ -13,5 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Undo the complimentary errcatch function
-errallow() { set +eE +o pipefail; trap ERR; }
+errallow() {
+    if [[ $1 ]]; then
+        echo "errallow help: Undo the complimentary errcatch function."
+    else
+        set +eE +o pipefail; trap ERR
+    fi
+}
diff --git a/errcatch-function b/errcatch-function
index 92751bf..a46dfbc 100644
--- a/errcatch-function
+++ b/errcatch-function
@@ -13,11 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# General purpose bash error handling setup
-# Exit on all errors. Print useful information.
-errcatch() { 
-    set -eE;
-    trap 'echo "${BASH_COMMAND:+BASH_COMMAND=\"$BASH_COMMAND\" }
+errcatch() {
+    if [[ $1 ]]; then
+        echo "errcatch help: Enable general purpose bash error handling.
+Exit on all errors and print useful information."
+    else
+        set -eE;
+        trap 'echo "${BASH_COMMAND:+BASH_COMMAND=\"$BASH_COMMAND\" }
 ${FUNCNAME:+FUNCNAME=\"$FUNCNAME\" }${LINENO:+LINENO=\"$LINENO\"  }\$?=$?"' ERR
-    set -o pipefail
+        set -o pipefail
+    fi
 }
-- 
2.25.1