From 1d5bbbd55d2307cd0c50e54e08f1ee632066eefb Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Sat, 2 Nov 2019 21:06:35 +0100
Subject: Add a `--help` flag

---
 doc/pdf-urls.1     | 5 +++++
 doc/pdf-urls.1.txt | 3 +++
 src/main.rs        | 7 +++++++
 3 files changed, 15 insertions(+)

diff --git a/doc/pdf-urls.1 b/doc/pdf-urls.1
index 3e90edc..7554d45 100644
--- a/doc/pdf-urls.1
+++ b/doc/pdf-urls.1
@@ -37,6 +37,11 @@ pdf-urls \- Extract URLs from a PDF file
 Extract all URLs from a PDF file and print them, one per line, to standard output\&.
 .SH "OPTIONS"
 .PP
+\-h, \-\-help
+.RS 4
+Print usage help\&.
+.RE
+.PP
 \-v, \-\-version
 .RS 4
 Print the program version\&.
diff --git a/doc/pdf-urls.1.txt b/doc/pdf-urls.1.txt
index ddc2048..294a98f 100644
--- a/doc/pdf-urls.1.txt
+++ b/doc/pdf-urls.1.txt
@@ -16,6 +16,9 @@ standard output.
 
 OPTIONS
 -------
+-h, --help::
+	Print usage help.
+
 -v, --version::
 	Print the program version.
 
diff --git a/src/main.rs b/src/main.rs
index 8f246b3..12d5725 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,6 +28,7 @@ fn print_usage() {
     println!(r#"usage: pdf-urls [<options>] FILE
 
 Options:
+    -h, --help          print this help menu
     -v, --version       print the program version"#);
 }
 
@@ -40,6 +41,12 @@ fn main() {
         process::exit(exitcode::USAGE);
     }
 
+    if args[1] == "-h" || args[1] == "--help" {
+        print_usage();
+
+        process::exit(exitcode::OK);
+    }
+
     if args[1] == "-v" || args[1] == "--version" {
         println!("{}", VERSION);
 
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