Add install target

Author: SuperSandro2000

Makefile

@@ -1,6 +1,8 @@
 MAKEFLAGS += --warn-undefined-variables
 SHELL := /bin/sh
 
+PREFIX ?= /usr/local
+
 .PHONY: all
 all: man
 
@@ -15,3 +17,10 @@ test:
 		# SC1117 Backslash is literal in...
 		# SC2059 Don't use variables in the printf format string. But we need to or colors won't work
 		shellcheck -e SC1117,SC2059 mgitstatus
+
+.PHONY: install
+install:
+		install -d $(DESTDIR)$(PREFIX)/bin
+		install -d $(DESTDIR)$(PREFIX)/man/man1
+		install mgitstatus -m 755 $(DESTDIR)$(PREFIX)/bin/
+		install mgitstatus.1 $(DESTDIR)$(PREFIX)/man/man1/

README.md

@@ -71,7 +71,7 @@ For more examples, see the [manual page](mgitstatus.1.md).
 
 # Installation
 
-mgitstatus requires a POSIX compliant shell. Bash will do fine.
+mgitstatus requires make.
 
 The following steps will install mgitstatus:
 
@@ -80,10 +80,10 @@ The following steps will install mgitstatus:
     $ cd multi-git-status
 
     # Install globally (all users)
-    $ sudo ./install.sh
+    $ sudo make install
 
     # Install locally (only your user)
-    $ PREFIX=~/.local ./install.sh
+    $ PREFIX=~/.local make install
 
 # License