Implement bootstrap script dependency checking

hack/bootstrap_tfw_dev.sh

@@ -14,26 +14,7 @@ BASEDIR="$(pwd)"
 BASEIMAGE=baseimage-${TFW_POSTFIX}
 TEST=test-${TFW_POSTFIX}
 FRONTEND=frontend-${TFW_POSTFIX}
-
 LOGFILE=/tmp/bootstrap_tfw.log
-logged() { "$@" >> $LOGFILE 2>&1; }
-
-spinned()
-{
-    "$@" &
-    pid=$!
-    spin=("-" "\\" "|" "/")
-
-    echo -n "${spin[0]}"
-    while kill -0 $pid &> /dev/null; do
-        for i in "${spin[@]}"; do
-            echo -ne "\b$i"
-            sleep 0.1
-        done
-    done
-    echo -ne "\b"
-}
-
 
 run()
 {
@@ -41,6 +22,7 @@ run()
     trap cleanlog EXIT
     : > $LOGFILE
 
+    check_dependencies
     clone_repos
     install_frontend_deps
     if [ "$TFWDEV" == "0" ]; then
@@ -55,6 +37,22 @@ run()
     echo "You can build & start TFW by executing the command: ${TEST}/hack/tfw.sh start"
 }
 
+check_dependencies()
+{
+    dependencies=("git" "docker" "yarn" "ng")
+    missing="0"
+    for dep in ${dependencies[@]}; do
+        if ! type "$dep" > /dev/null 2>&1; then
+            echo "Dependency '${dep}' not found!"
+            missing="1"
+        fi
+    done
+    if [ "$missing" == "1" ]; then
+        echo "Please install the missing packages and retry!"
+        exit 1
+    fi
+}
+
 showlog() { echo && echo "Error! Showing logs:" && cat $LOGFILE; }
 cleanlog() { rm $LOGFILE; }
 err_cleanup() { cd "$BASEDIR" && rm -rf "$BASEIMAGE" "$FRONTEND" "$TEST"; }
@@ -120,4 +118,25 @@ merge_repos()
     echo "Done!"
 }
 
+logged()
+{
+    "$@" >> $LOGFILE 2>&1
+}
+
+spinned()
+{
+    "$@" &
+    pid=$!
+    spin=("-" "\\" "|" "/")
+
+    echo -n "${spin[0]}"
+    while kill -0 $pid &> /dev/null; do
+        for i in "${spin[@]}"; do
+            echo -ne "\b$i"
+            sleep 0.1
+        done
+    done
+    echo -ne "\b"
+}
+
 run