update readme

README.md

@@ -1,28 +1,50 @@
 # Sub-Resource Integrity Generator Scripts
 
-Basic scripts to generate SRI hashes for a given file. POSIX-compliant shell script for use on *nix and PowerShell for use on Windows.
+Basic scripts to generate SRI hashes. POSIX-compliant shell script for use on *nix and PowerShell for use on Windows.
+
+## common features
+
+- Hash individual files or a quoted space-delimited list of files.
+- Hash all files within a specified directory with one command.
+- Hash a filtered-list of files within a directory with one command.
+- Process a list of files and a directory (filtered or not) at the same time, saving you typing!
 
 ## linux script
 
 - This script *requires* openssl be installed and will exit if it cannot find openssl.
 - You can rename *sri* to anything you like.
-- I suggest copying *sri* somewhere like */usr/local/bin* or */usr/bin* so it can be run easier and from anywhere
-- Complete help is included in the script. Simply run without any parameters or run with '*--help*'
+- I suggest copying *sri* somewhere like */usr/local/bin* or */usr/bin* so it can be run easier and from anywhere (see note below).
+- Complete help is included in the script. Simply run without any parameters or run with '*--help*'.
 
-### examples
+  ```bash
+  ./sri --help
+  ```
 
-Assuming you have *not* copied the script to your path and it is located in your home directory:
+### copy to path location
+
+Copying the script to a location within your path makes running it more convenient. For example:
+
+Assuming you store it in your home directory /Downloads and need to hash files in your webroot (eg: /var/www/css/...)
 
 ```bash
-cd ~
-./sri -f /var/www/css/style.css
+~/SRIhelper/sri -f /var/www/css/style.css
 ```
 
-If copied to a directory in your path like */usr/local/bin*, then you can simplify things by running it directly from where the file you want to hash is located:
+Whereas, if it's in your path, you can omit the source path and just run
 
 ```bash
-cd /var/www/css
-sri -f style.css
+sri -f /var/www/css/style.css
+```
+
+To make this work, just copy the file to a location in your path. There are no dependencies or anything to worry about, the file is self-contained and POSIX compliant.
+
+```bash
+# copy to local/bin
+cp ~/SRIhelper/sri /usr/local/bin/sri
+# copy and rename to something else
+cp ~/SRIhelper/sri /usr/local/bin/hashSRI
+# copy to your global bin directory (usually local is preferred!)
+cp ~/SRIhelper/sri /usr/bin/sri
 ```
 
 ### troubleshooting