Make use of PREFIX environment variable

This patch puts the environment variable PREFIX in more use. If
specified, mull-wizard Makefile substitute all instances of prefix with
the provided environment variable.

Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>

Makefile

@@ -1,10 +1,8 @@
 .POSIX:
 
 OS = $(shell uname -s)
-ifeq ($(OS), Darwin)
+ifndef PREFIX
   PREFIX = /usr/local
-else
-  PREFIX = /usr
 endif
 MANPREFIX = $(PREFIX)/share/man
 
@@ -18,12 +16,16 @@ install:
 	for shared in share/*; do \
 		cp -f $$shared $(DESTDIR)$(PREFIX)/share/mutt-wizard; \
 	done
+	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
+	cp -f mw.1 $(DESTDIR)$(MANPREFIX)/man1/mw.1
+	if [ "$(PREFIX)" ]; then \
+		sed -iba 's:/usr/local:$(PREFIX):' $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrc; \
+		sed -iba 's:/usr/local:$(PREFIX):' $(DESTDIR)$(PREFIX)/bin/mw; \
+		sed -iba 's:/usr/local:$(PREFIX):' $(DESTDIR)$(MANPREFIX)/man1/mw.1; \
+	fi
 	if [ "$(OS)" = "Darwin" ]; then \
-		sed -iba 's/\/usr\//\/usr\/local\//' $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrc; \
 		rm $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrcba; \
 	fi
-	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
-	cp -f mw.1 $(DESTDIR)$(MANPREFIX)/man1/mw.1
 
 uninstall:
 	for script in bin/*; do \

bin/mw

@@ -8,11 +8,7 @@ command -V gpg >/dev/null 2>&1 && GPG="gpg" || GPG="gpg2"
     }
 ! command -v mbsync >/dev/null && printf "\`mbsync\` must be installed to run mutt-wizard.\\n" && exit
 
-case "$(uname)" in
-	Linux) prefix="/usr" ;;
-	*)  prefix="/usr/local" ;;
-esac
-
+prefix="/usr/local"
 muttdir="$HOME/.config/mutt"		# Main mutt config location
 accdir="$muttdir/accounts"		# Directory for account settings
 maildir="$HOME/.local/share/mail"	# Location of mail storage

mw.1

@@ -60,10 +60,10 @@ will delete downloaded mail for for safety (and time)'s sake. If you want to del
 .TP
 .B Default settings
 The mutt-wizard has many default settings that focus on making it aesthetically pleasing and supplying more vim-like bindings. These can be found in
-.I /usr/share/mutt-wizard/mutt-wizard.muttrc
+.I /usr/local/share/mutt-wizard/mutt-wizard.muttrc
 and the default mailcap file can be found in
 .I
-/usr/share/mutt-wizard/mailcap.
+/usr/local/share/mutt-wizard/mailcap.
 Any of these settings can be overwritten in
 .I ~/.config/mutt/muttrc,
 but be mindful that your overriding binds should appear after the
@@ -73,7 +73,7 @@ file is sourced.
 .TP
 .B Detecting server settings
 mutt-wizard has a repository of email services and their server information kept in
-.I /usr/share/mutt-wizard/domains.csv
+.I /usr/local/share/mutt-wizard/domains.csv
 which is used to automatically configure email settings.
 If your email provider is not found there, it will prompt you to input your email service's IMAP and SMTP server information which can usually be found by searching online.
 

share/mutt-wizard.muttrc

@@ -3,7 +3,7 @@
 # mutt-wizard will have this file sourced from your muttrc.
 # In the interest of seamless updating, do not edit this file.
 # If you want to override any settings, set those in your muttrc.
-set mailcap_path = /usr/share/mutt-wizard/mailcap
+set mailcap_path = /usr/local/share/mutt-wizard/mailcap
 set certificate_file = ~/.cache/mutt-wizard/certificates
 set date_format="%y/%m/%d %I:%M%p"
 set index_format="%2C %zs %?X?A& ? %D %-15.15F %s (%-4.4c)"