add git as dependency

README.md

@@ -5,12 +5,14 @@ CLI script to rearrange pdf pages for printing book signatures and foldable zine
 ## Install pdf2book in Linux or macOS
 
 ### Dependencies: 
-- [`bash`](https://www.gnu.org/software/bash/) (mostly already installed)
+- [`bash`](https://www.gnu.org/software/bash/) (mostly already pre-installed)
     - check with `bash --version`
-- [`python3`](https://www.python.org/downloads/) (mostly already installed)
+- [`python3`](https://www.python.org/downloads/) (mostly already pre-installed)
     - check with `python3 --version`
-- [`venv`](https://docs.python.org/3/library/venv.html) (might be installed)
+- [`venv`](https://docs.python.org/3/library/venv.html) (might be pre-installed)
     - check with `python3 -m venv --help`
+- [`git`](https://git-scm.com/downloads)(might be pre-installed)
+    - check with `git --version`
 
 ### Installation script 
 use the installation script

install.sh

@@ -5,12 +5,13 @@
 # - python3: check with `python3 --version`
 #- venv: check with `python3 -m venv --help`
 #
-# check dependencies
 set -e
+# check dependencies
+# if not available print error msg
 bash --version > /dev/null
 python3 --version > /dev/null
 python3 -m venv --help > /dev/null
-set +e
+git --version > /dev/null
 #
 PREFIX="$HOME/.local"
 HELP="""