README.md: add info about install script

README.md

@@ -2,7 +2,7 @@
 
 CLI script to rearrange pdf pages for printing book signatures and foldable zines
 
-## INSTALL pdf2book in Linux or macOS
+## Install pdf2book in Linux or macOS
 
 ### Dependencies: 
 - [`bash`](https://www.gnu.org/software/bash/) (mostly already installed)
@@ -12,6 +12,30 @@ CLI script to rearrange pdf pages for printing book signatures and foldable zine
 - [`venv`](https://docs.python.org/3/library/venv.html) (might be installed)
     - check with `python3 -m venv --help`
 
+### Installation script 
+use the installation script
+```bash 
+# create temporary directory
+TMPDIR=$(mktemp -d)
+# change into temporary dir
+pushd $TMPDIR
+# clone pdf2book source code
+git clone https://git.wlankabel.at/onipa/pdf2book.git 
+# change into pdf2book directory 
+pushd pdf2book
+# show help message of install script
+bash install.sh -h 
+# execute interactive install script
+bash install.sh
+# change to previous folder
+popd
+popd 
+# remove temporary folder
+rm -rf $TMPDIR 
+```
+
+### install manually 
+
 ```bash
 #!/bin/bash
 PREFIX="$HOME/.local"

install.sh

@@ -17,7 +17,7 @@ HELP="""
 $0: install pdf2book with its virtual environment
 usage:
 	-h|--help           show this help message and exti
-	-d|--delete         remove pdf2book
+	-d|--delete         remove pdf2book installation
 	-f|--force          force overwriting of PREFIX/lib/pdf2book.git
 	                    can be used for upgrading
 	-p|--prefix PREFIX  install into PREFIX/lib and PREFIX/bin
@@ -30,6 +30,11 @@ while [[ $# -gt 0 ]]; do
 	case "$1" in
 		--delete|-d)
 		DELETE=1
+		echo 'THIS DOES NOTHING AT THE MOMENT ...'
+		echo 'todo:'
+		echo " - [ ] remove $PREFIX/pdf2book.git"
+		echo " - [ ] and clean your ~/.bashrc or ~/.zshrc"
+		exit 0
 	;;
 		--force|-f)
 		FORCE=1