🎨 simplify Makefile

Makefile

@@ -1,13 +1,11 @@
-# Compatible with GNU make and BSD make.
+NAME=gister
 
-include config.mk
+PREFIX?=/usr/local
+BINDIR=${PREFIX}/bin
 
-install:
- @echo Installing to ${PREFIX}/bin ...
- @mkdir -p ${PREFIX}/bin
- @cp -f bin/gister ${PREFIX}/bin/gister
- @chmod 755 ${PREFIX}/bin/gister
+install: ${NAME}
+ @mkdir -p ${BINDIR}
+ @install -c -m 755 bin/${NAME} ${BINDIR}/${NAME}
 
 uninstall:
- @echo Uninstalling from ${PREFIX}/bin ...
- @rm -f ${PREFIX}/bin/gister
+ @rm -f ${BINDIR}/${NAME}

README.md

@@ -74,8 +74,15 @@ You need to install its dependencies mentioned before yourself.
  cd gister
  make install
 
-- Edit `config.mk` if you do not want to install it to `/usr/local`.
-- Compatible with both GNU and BSD make.
+By default gister will be installed into `/usr/local/bin/gister`.
+Change `PREFIX` to install r3c to another directory.
+For example:
+
+```sh
+make PREFIX=~/.local install
+```
+
+The Makefile is compatible with both GNU and BSD make.
 
 To uninstall:
 
@@ -84,6 +91,13 @@ To uninstall:
 ; make uninstall
 ```
 
+If you have changed the `PREFIX` variable when installing, you need to use the same value when uninstalling.
+For example:
+
+```sh
+make PREFIX=~/.local uninstall
+```
+
 You can also install/uninstall gister via [basher].
 
 [basher]: https://github.com/basherpm/basher