1 files changed, 47 insertions, 0 deletions

diff --git a/demo.sh b/demo.sh
new file mode 100644
index 0000000..256d091
--- /dev/null
+++ b/demo.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+readonly BASH_LIB_NAME=DEMO
+source ./bash-lib.sh
+
+# Set `DEMO_DEBUG=1` to enable debug messages
+
+trace "this is a trace message" "with additional data"
+debug "this is a debugging message" "with additional data"
+info "this is an informational message" "with additional data"
+warn "this is a warning message" "with additional data"
+error "this is an error message" "with additional data"
+
+# Like echo, but to stderr
+echoe '------------------------------'
+
+if is_debug; then
+        info "Debugging messages:" on
+else
+        info "Debugging messages:" off
+fi
+
+if is_trace; then
+        info "Trace messages:" on
+else
+        info "Trace messages:" off
+fi
+
+echoe '------------------------------'
+
+# Use critical with `set +e` if you want to trap errors
+(
+        function handle_error() {
+                info "handling error..."
+        }
+
+        set +e
+        trap "handle_error" ERR
+
+        critical "this is a critical error:" "this will allow some error recovery"
+        info "but with 'set +e', the program continues its course"
+)
+
+echoe '------------------------------'
+
+info "use 'fatal()' in either case if you want to quit with an error message"
+fatal "some unrecoverable error occurred, exiting"