install

#!/bin/sh

# Get filename of this script, with fallback
progname="$(basename "$0" || 'cttab-install')"

# Must be `firefox` or `librewolf`
browser="$1"
case "$browser" in
    # Valid
    firefox|librewolf) ;;
    # Invalid - empty or unsupported browser
    *)
        echo 'please enter a supported browser name to install for'
        if [ "$browser" ]; then
            echo "'$browser' is not supported by this script"
        fi
        echo 'options: [ firefox | librewolf ]'
        echo "    EXAMPLE: $progname firefox <FILEPATH>"
        echo 'or uninstall for a browser:'
        echo "    EXAMPLE: $progname firefox --uninstall"
        exit 1
        ;;
esac

# Uninstall for a browser
if [ "$2" = '--uninstall' ] || [ "$1" = '--remove' ]; then
    uninstall=1
else
    # If this script is ran from cttab directory, `./index.html` is used
    filepath="$2"
    if [ ! "$filepath" ]; then
        # Use relative filepath to current directory
        filepath_rel="$(pwd)/index.html"
        if [ -f "$filepath_rel" ]; then
            filepath="$filepath_rel"
            echo "NOTE: using $filepath_rel as filepath"
            echo
        else
            # No filename given or could be inferred
            echo "please enter the FULL filefilepath to the 'index.html' file"
            echo "    EXAMPLE: $progname <BROWSER> ~/Documents/cttab/index.html"
            echo
            echo "alternatively, run this script from inside your 'cttab' folder"
            echo "    EXAMPLE: cd ~/Documents/cttab && $progname <BROWSER>"
            exit 2
        fi
    fi
    # Replace `~` with full path to home directory
    if [ "${filepath%"${filepath#?}"}" = "~" ]; then
        filepath="$HOME${filepath#?}"
    fi
    # Check index file exists
    if [ ! -f "$filepath" ]; then
        echo "cannot find a file at '$filepath'"
        echo 'please make sure that is the correct filepath'
        echo "NOTE: do NOT include 'file:///' at the start of the path"
        echo "    EXAMPLE: $progname <BROWSER> ~/Documents/cttab/index.html"
        exit 3
    fi
    # Add `file://` prefix to filename
    # Note only 2 extra slashes are needed, as path is already absolute, starting at root
    filepath_full="file://$filepath"
fi

# Path to create all files in
path="/usr/lib/$browser"
# Check path exists
if [ ! -d "$path" ]; then
    echo "ERROR: cannot find $path"
    echo 'maybe the selected browser is not installed on your system, or installed in a different directory?'
    exit 4
fi

# Files to create
# autoconfig.cfg
path_1="$path/autoconfig.cfg"
file_1="// First line must be comment! Do not delete this line!
var {classes:Cc,interfaces:Ci,utils:Cu} = Components;
try { Cu.import(\"resource:///modules/AboutNewTab.jsm\");
var newTabURL = \"$filepath_full\";
AboutNewTab.newTabURL = newTabURL;
} catch(e){Cu.reportError(e);} // report errors in the Browser Console"
# defaults/pref/autoconfig.cfg
path_2="$path/defaults/pref/autoconfig.js"
file_2='// First line must be comment! Do not delete this line!
pref("general.config.filename", "autoconfig.cfg");
pref("general.config.obscure_value", 0);
pref("general.config.sandbox_enabled", false);'


action='create'
[ -n "$uninstall" ] && action='remove'
echo "NOTE: root access is required to $action 2 files:"
echo "    $path_1"
echo "    $path_2"

if [ -z "$uninstall" ]; then
    # Create files
    echo "$file_1" | sudo tee "$path_1" > /dev/null || {
        echo "ERROR: cannot create file $path_1"
        exit 5
    }
    echo "$file_2" | sudo tee "$path_2" > /dev/null || {
        echo "ERROR: cannot create file $path_2"
        exit 6
    }
else
    # Remove files
    if [ ! -e "$path_1" ] && [ ! -e "$path_1" ]; then
        echo
        echo 'WARNING: no files to remove!'
        exit 0
    fi
    if [ -e "$path_1" ]; then
        sudo rm "$path_1" || {
            echo "ERROR: cannot remove file $path_1"
            exit 7
        }
    fi
    if [ -e "$path_2" ]; then
        sudo rm "$path_2" || {
            echo "ERROR: cannot remove file $path_2"
            exit 8
        }
    fi
fi

echo
echo 'All good!'
echo "NOTE: $browser needs to be restarted for changes to be applied"
echo "NOTE: to apply to new *windows* as well, change this setting:"
echo "    about:preferences > Home > Homepage and new windows > Custom URLS"
echo "    to: $filepath"