Add: Prerequisites checker

[csit.git] / resources / libraries / bash / function / common.sh

diff --git a/resources/libraries/bash/function/common.sh b/resources/libraries/bash/function/common.sh
index 89c8f31..751d994 100644 (file)
--- a/resources/libraries/bash/function/common.sh
+++ b/resources/libraries/bash/function/common.sh
@@ -167,6 +167,21 @@ function check_download_dir () {
 }
 
 
+function check_prerequisites () {
+
+    # Fail if prerequisites are not met.
+    #
+    # Functions called:
+    # - installed - Check if application is installed/present in system.
+    # - die - Print to stderr and exit.
+
+    set -exuo pipefail
+
+    if ! installed sshpass; then
+        die "Please install sshpass before continue!"
+    fi
+}
+
 function cleanup_topo () {
 
     # Variables read:
@@ -520,6 +535,24 @@ function get_test_tag_string () {
 }
 
 
+function installed () {
+
+    # Check if the given utility is installed. Fail if not installed.
+    #
+    # Duplicate of common.sh function, as this file is also used standalone.
+    #
+    # Arguments:
+    # - ${1} - Utility to check.
+    # Returns:
+    # - 0 - If command is installed.
+    # - 1 - If command is not installed.
+
+    set -exuo pipefail
+
+    command -v "${1}"
+}
+
+
 function reserve_and_cleanup_testbed () {
 
     # Reserve physical testbed, perform cleanup, register trap to unreserve.
@@ -650,14 +683,11 @@ function run_pybot () {
 
 function select_arch_os () {
 
-    # Populate variables related to local operating system.
-    #
-    # Also install any missing prerequisities CSIT tests need.
-    # TODO: Move the installation to a separate function?
+    # Set variables affected by local CPU architecture and operating system.
     #
     # Variables set:
-    # - VPP_VER_FILE - Name of File in CSIT dir containing vpp stable version.
-    # - IMAGE_VER_FILE - Name of File in CSIT dir containing the image name.
+    # - VPP_VER_FILE - Name of file in CSIT dir containing vpp stable version.
+    # - IMAGE_VER_FILE - Name of file in CSIT dir containing the image name.
     # - PKG_SUFFIX - Suffix of OS package file name, "rpm" or "deb."
 
     set -exuo pipefail