replaces the non-repository managed web interface for pihole and keeps it updated

automated install/webinterface.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+#
+# this script will update the pihole web interface files.
+#
+# if this is the first time running this script after an 
+# existing installation, the existing web interface files
+# will be removed and replaced with the latest master
+# branch from github. subsequent executions of this script
+# will pull the latest version of the web interface.
+#
+# @TODO: add git as requirement to basic-install.sh
+#
+
+WEB_INTERFACE_GIT_URL="https://github.com/jacobsalmela/AdminLTE.git"
+WEB_INTERFACE_DIR="/var/www/html/admin"
+
+main() {
+    prerequisites
+    if ! is_repo; then
+        make_repo
+    fi
+    update_repo
+}
+
+prerequisites() {
+
+    # must be root to update
+    if [[ $EUID -ne 0 ]]; then
+        sudo bash "$0" "$@"
+        exit $?
+    fi
+
+    # web interface must already exist. this is a (lazy)
+    # check to make sure pihole is actually installed.
+    if [ ! -d "$WEB_INTERFACE_DIR" ]; then
+        echo "$WEB_INTERFACE_DIR not found. Exiting."
+        exit 1
+    fi
+
+    if ! type "git" > /dev/null; then
+        apt-get -y install git
+    fi
+}
+
+is_repo() {
+    # if the web interface directory does not have a .git folder
+    # it means its using the master.zip archive from the install
+    # script.
+    if [ ! -d "$WEB_INTERFACE_DIR/.git" ]; then
+        return 1
+    fi
+    return 0
+}
+
+# removes the web interface installed from the master.zip archive and
+# replaces it with the current master branch from github
+make_repo() {
+    # remove the non-repod interface and clone the interface
+    rm -rf $WEB_INTERFACE_DIR
+    git clone "$WEB_INTERFACE_GIT_URL" "$WEB_INTERFACE_DIR"
+}
+
+# pulls the latest master branch from github
+update_repo() {
+    # pull the latest commits
+    cd "$WEB_INTERFACE_DIR"
+    git pull    
+}
+
+main