From: Anil Belur <abelur@linuxfoundation.org>
Date: Sat, 7 Apr 2018 00:30:22 +0000 (+0000)
Subject: Merge "Validate packer version before install"
X-Git-Tag: v0.18.0~12
X-Git-Url: https://gerrit.linuxfoundation.org/infra/gitweb?a=commitdiff_plain;h=7523625d22342839f99c02c0400a4b5d17252671;hp=ad0ee7c792b24345f2b419b3418bd84eac0f6ac1;p=releng%2Fglobal-jjb.git

Merge "Validate packer version before install"
---

diff --git a/shell/packer-install.sh b/shell/packer-install.sh
index 8b3ef6d5..90780cbf 100644
--- a/shell/packer-install.sh
+++ b/shell/packer-install.sh
@@ -12,18 +12,14 @@ echo "---> packer-install.sh"
 # The script checks for the packer binaries and installs the binary
 # if its not available
 
-# $PACKER_VERSION        : Define a packer version passed as job paramter
+# Ensure we fail the job if any steps fail.
+set -eu -o pipefail
 
+# $PACKER_VERSION        : Define a packer version passed as job paramter
 PACKER_VERSION="${PACKER_VERSION:-1.1.3}"
 export PATH="${WORKSPACE}/bin:$PATH"
 
-# Ensure we fail the job if any steps fail.
-set -eu -o pipefail
-
-if hash packer.io 2>/dev/null; then
-    echo "packer.io command is available."
-else
-    echo "packer.io command not is available. Installing packer ..."
+packer_install() {
     # Installs Hashicorp's Packer binary, required for verify & merge packer jobs
     pushd "${WORKSPACE}"
     wget -nv "https://releases.hashicorp.com/packer/${PACKER_VERSION}/packer_${PACKER_VERSION}_linux_amd64.zip"
@@ -32,4 +28,23 @@ else
     # rename packer to avoid conflict with binary in cracklib
     mv "${WORKSPACE}/bin/packer" "${WORKSPACE}/bin/packer.io"
     popd
+}
+
+# Functions to compare semantic versions x.y.z
+version_gt() { test "$(echo "$@" | tr " " "\n" | sort -V | head -n 1)" != "$1"; }
+version_le() { test "$(echo "$@" | tr " " "\n" | sort -V | head -n 1)" == "$1"; }
+version_lt() { test "$(echo "$@" | tr " " "\n" | sort -rV | head -n 1)" != "$1"; }
+version_ge() { test "$(echo "$@" | tr " " "\n" | sort -rV | head -n 1)" == "$1"; }
+
+if hash packer.io 2>/dev/null; then
+    CURRENT_VERSION="$(packer.io --version)"
+    if version_lt $CURRENT_VERSION $PACKER_VERSION; then
+       echo "Packer version $CURRENT_VERSION installed is less than $PACKER_VERSION available, updating Packer."
+       packer_install
+    else
+      echo "Packer version installed $CURRENT_VERSION is greater than or equal to the required minimum version $PACKER_VERSION."
+    fi
+else
+    echo "Packer binary not available, installing Packer version $PACKER_VERSION."
+    packer_install
 fi