Adjust Makefile target 'install' for optional installation to the home folder about todo.txt-cli HOT 2 CLOSED

diff --git a/Makefile b/Makefile
index 512a54c..8514502 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
 #
 # Makefile for todo.txt
 #
-INSTALL_DIR=/usr/local/bin
+PREFIX=/usr/local
+INSTALL_DIR=$(PREFIX)/bin

 # Dynamically detect/generate version file as necessary
 # This file will define a variable called VERSION.
@@ -31,11 +32,13 @@ clean:
        rm -f $(DISTNAME).tar.gz $(DISTNAME).zip

 install:
+       mkdir -p $(INSTALL_DIR)
        install --mode=755 todo.sh $(INSTALL_DIR)
-       install --mode=644 todo_completion /etc/bash_completion.d/todo
-       mkdir -p /etc/todo
-       [ -e /etc/todo/config ] || \
-               sed "s/^\(export[ \t]*TODO_DIR=\).*/\1~\/.todo/" todo.cfg > /etc/todo/config
+       mkdir -p $(PREFIX)/etc/bash_completion.d/todo
+       install --mode=644 todo_completion $(PREFIX)/etc/bash_completion.d/todo
+       mkdir -p $(PREFIX)/etc/todo
+       [ -e $(PREFIX)/etc/todo/config ] || \
+               sed "s/^\(export[ \t]*TODO_DIR=\).*/\1~\/.todo/" todo.cfg > $(PREFIX)/etc/todo/config
 #
 # Testing
 #