added an example

dependencies.sh

@@ -0,0 +1,16 @@
+#! /bin/bash
+
+# Check dependencies
+# It mutes the output but verifies if the command returns an error
+# if that's true, then the process can't continue
+command -v inkscape >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'inkscape'"; DEPSCOMPLETE=no; }
+command -v parallel >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'parallel'"; DEPSCOMPLETE=no; }
+command -v bashash >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'bashash'"; DEPSCOMPLETE=no; }
+command -v conqueror >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'conqueror'"; DEPSCOMPLETE=no; }
+command -v cacacaca >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'cacacaca'"; DEPSCOMPLETE=no; }
+command -v shnt >/dev/null 2>&1 || { echo >&2 "I cannot continue without 'shnt'"; DEPSCOMPLETE=no; }
+
+# here is the checking. it is sepparated for practicy
+if [ DEPSCOMPLETE = no ]
+then exit 1
+fi

example.sh

@@ -6,9 +6,19 @@ case "$@" in *--opt-1*|*-h*)
 esac
 
 case "$@" in *--opt-2*)
-	echo OPT_2
+    OPT_2=true
 esac
 
+if [ $OPT_2 ]
+then echo $OPT_2
+fi
+
 case "$@" in *--opt-3*)
 	echo OPT_3
+	opti_3=avoid
 esac
+
+if [ $opti_3 = avoid ]
+ then echo opti_3 was avoided
+ else echo opti_3 was automated
+fi