Break out build and install scripts (#10)

Separate build and install logic into 2 scripts, update README accordingly

README.md

@@ -34,15 +34,23 @@ SUBCOMMANDS:
 ## Releases
 Currently, releases of phylum-cli are statically-built for linux x64. 
 
+## Installation
+Currently, releases of phylum-cli are statically-built for linux x64. If you need another architecture, see the section below on Building.
+
+An install script is provided for both releases and git versions. The script creates a `$HOME/.phylum` directory and copies the required files. 
+
+This script also **adds the .phylum directory to the user's PATH** on bash.
+
 ## Building
 Phylum-cli is written in Rust, so you'll need a recent Rust installation to build it. [Install Rust](https://www.rust-lang.org/tools/install)
 1. Clone repository
 ```sh
 git clone https://github.com/phylum-dev/cli
 ```
-2. Run install script in cli/lib
+2. Run build and install scripts in cli/lib
 ```sh
 cd cli/lib
+bash build.sh
 bash install.sh
 ```
 

lib/build.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+cargo install --path .

lib/install.sh

@@ -1,8 +1,14 @@
 #!/bin/bash
-cargo install --path .
 mkdir -p ${HOME}/.phylum
 cp -n src/bin/settings.yaml ${HOME}/.phylum/
 cp -f src/bin/phylum-cli.bash ${HOME}/.phylum/
 
-echo "source \$HOME/.phylum/phylum-cli.bash" >> ${HOME}/.bashrc
+if ! grep -q 'phylum-cli.bash' $HOME/.bashrc ;
+then
+  echo "source \$HOME/.phylum/phylum-cli.bash" >> ${HOME}/.bashrc
+fi
+if ! grep -q '.phylum/:\$PATH' $HOME/.bashrc;
+then
+  echo 'export PATH="$HOME/.phylum/:$PATH"' >> ${HOME}/.bashrc
+fi