Adds a makefile for local install and cleans up some of the code

Makefile

@@ -0,0 +1,22 @@
+UNAME := $(shell uname -s)
+
+SYN := /syntax
+FT := /ftdetect
+
+ifeq ($(UNAME), Haiku)
+ROOT = /boot/home/config/settings/vim
+else
+ROOT := ~/.vim
+endif
+
+.PHONY: install
+install: ./syntax/gmi.vim ./ftdetect/gmi.vim
+	install -d ${ROOT}${SYN}
+	install -d ${ROOT}${FT}
+	install -m 0644 ./syntax/gmi.vim ${ROOT}${SYN}
+	install -m 0644 ./syntax/gmi.vim ${ROOT}${FT}
+
+.PHONY: remove
+remove:
+	rm -rf ${ROOT}${SYN}/gmi.vim
+	rm -rf ${ROOT}${FT}/gmi.vim

syntax/gmi.vim

@@ -3,32 +3,39 @@
 " " Maintainer: sloum < sloum AT rawtext.club >
 " " Latest Revision: 02 February 2020
 
-if exists("b:current_syntax")
+"
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
   finish
 endif
 
 " Handle monospaced blocks
-syn region Special start="```" end="```"
+syn region gmiMono start="```" end="```"
 
 " Handle between one and three heading levels
-syn match Constant /^#\{1,3}.*$/
+syn match gmiHeader /^#\{1,3}.*$/
 
 " Start a link line
-syn match Todo /^=>/ nextgroup=Underlined skipwhite
+syn match gmiLinkStart /^=>/ nextgroup=gmiLinkUrl skipwhite
 
 " An extremely naive way of handling the URL portion of the link line
 " TODO think about improving this
-syn match Underlined /\S\+/ contained nextgroup=String skipwhite
+syn match gmiLinkUrl /\S\+/ contained nextgroup=gmiLinkTitle skipwhite
 
-syn match String /.*$/ contained
+syn match gmiLinkTitle /.*$/ contained
 
 " Handle list items
-syn match Identifier /^\*.*$/
-
-syn match Ignore /^77/
-syn match String /^88/
-syn match Comment /^99/
-
-
+syn match gmiListItem /^\*.*$/
 
 let b:current_syntax = "gmi"
+
+hi def link gmiMono Special
+hi def link gmiHeader Constant
+hi def link gmiLinkStart Todo
+hi def link gmiLinkUrl Underlined
+hi def link gmiLinkTitle String
+hi def link gmiListItem Identifier
+