docs: update

CONTRIBUTING.md

@@ -4,16 +4,26 @@
 ## Table of Contents
 <!-- vim-markdown-toc GFM -->
 
-* [ShellCheck](#shellcheck)
 * [Coding Conventions](#coding-conventions)
-* [No no's](#no-nos)
-* [If Statements](#if-statements)
-* [Case Statements](#case-statements)
+    * [ShellCheck](#shellcheck)
+    * [No no's](#no-nos)
+    * [If Statements](#if-statements)
+    * [Case Statements](#case-statements)
+* [Making changes to Neofetch](#making-changes-to-neofetch)
+    * [Adding support for a new Operating System / Distribution.](#adding-support-for-a-new-operating-system--distribution)
 
 <!-- vim-markdown-toc -->
 
 
-## ShellCheck
+## Coding Conventions
+
+- Indent 4 spaces.
+- Use [snake_case](https://en.wikipedia.org/wiki/Snake_case) for function
+  and variable names.
+- Keep lines below `100` characters long.
+- Use `[[ ]]` for tests.
+
+### ShellCheck
 
 For your contribution to be accepted, your changes need to pass
 ShellCheck.
@@ -30,16 +40,7 @@ shellcheck neofetch -e SC1090,SC2009,SC2012,SC2016,SC2034,SC2128,SC2153,SC2154,S
 request on the repo and our Travis.ci hook will run ShellCheck for you.
 
 
-## Coding Conventions
-
-- Indent 4 spaces.
-- Use [snake_case](https://en.wikipedia.org/wiki/Snake_case) for function
-  and variable names.
-- Keep lines below `100` characters long.
-- Use `[[ ]]` for tests.
-
-
-## No no's
+### No no's
 
 - Don’t use `echo`.
     - Use `printf "%s\n"`
@@ -52,7 +53,7 @@ request on the repo and our Travis.ci hook will run ShellCheck for you.
     - Use `awk '/pattern/ { printf }'`
 
 
-## If Statements
+### If Statements
 
 If the test only has one command inside of it; use the compact test
 syntax. Otherwise the normal `if`/`fi` is just fine.
@@ -72,7 +73,7 @@ fi
 ```
 
 
-## Case Statements
+### Case Statements
 
 Case statements need to be formatted in a specific way.
 
@@ -92,3 +93,55 @@ case "$var" in
     ;;
 esac
 ```
+
+## Making changes to Neofetch
+
+### Adding support for a new Operating System / Distribution.
+
+Adding support for a new OS/Distro requires adding the Name, Logo and
+Colors of the OS/Distro to the `get_distro_ascii()` function.
+
+The function is located right at the bottom of the script, one function
+above `main()`. Inside this function you’ll find an alphabetical list of
+each OS/Distro.
+
+Find the spot in the list your new OS/Distro fits into and start
+implementing your changes.
+
+If your OS/Distro requires changes to the actual information gathering
+functions then you can make these changes in the `get_*` functions.
+
+**Syntax**:
+
+- You have to escape back-slashes (`\`). (eg `\\`)
+- You can use `${c1}` to `${c6}`to color the ascii.
+    - These are evaluated *after* we read the file.
+
+
+**Example**:
+
+```sh
+        "CRUX"*)
+            set_colors 4 5 7 6
+            read -rd '' ascii_data <<'EOF'
+${c1}         odddd
+      oddxkkkxxdoo
+     ddcoddxxxdoool
+     xdclodod  olol
+     xoc  xdd  olol
+     xdc  ${c2}k00${c1}Okdlol
+     xxd${c2}kOKKKOkd${c1}ldd
+     xdco${c2}xOkdlo${c1}dldd
+     ddc:cl${c2}lll${c1}oooodo
+   odxxdd${c3}xkO000kx${c1}ooxdo
+  oxdd${c3}x0NMMMMMMWW0od${c1}kkxo
+ oooxd${c3}0WMMMMMMMMMW0o${c1}dxkx
+docldkXW${c3}MMMMMMMWWN${c1}Odolco
+xx${c2}dx${c1}kxxOKN${c3}WMMWN${c1}0xdoxo::c
+${c2}xOkkO${c1}0oo${c3}odOW${c2}WW${c1}XkdodOxc:l
+${c2}dkkkxkkk${c3}OKX${c2}NNNX0Oxx${c1}xc:cd
+${c2} odxxdx${c3}xllod${c2}ddooxx${c1}dc:ldo
+${c2}   lodd${c1}dolccc${c2}ccox${c1}xoloo
+EOF
+        ;;
+```