Install dependencies automatically

Install system packages needed to build manila-image-elements.

Change-Id: Ia1fef024f9188869a1993604dcfbd09499700515
Closes-Bug: #1504530

README.rst

@@ -16,5 +16,3 @@ Script for creating Ubuntu based image with our elements and default parameters.
 .. sourcecode:: bash
 
     tox -e buildimage
-
-Note: Make sure you have qemu-img (qemu-utils package on Ubuntu/Debian, qemu on Fedora/RHEL/openSUSE) and kpartx installed.

bin/manila-image-create

@@ -16,6 +16,7 @@ export ELEMENTS_PATH=$_PREFIX/elements
 # Collect configuration
 # --------------------
 # Development options:
+DIB_UPDATE_REQUESTED=${DIB_UPDATE_REQUESTED:-true}
 USE_OFFLINE_MODE=${USE_OFFLINE_MODE:-"yes"}
 ENABLE_DEBUG_MODE=${ENABLE_DEBUG_MODE:-"no"}
 DISABLE_IMG_COMPRESSION=${DISABLE_IMG_COMPRESSION:-"no"}
@@ -42,7 +43,7 @@ REQUIRED_ELEMENTS="manila-ssh vm $MANILA_IMG_OS dhcp-all-interfaces cleanup-kern
 OPTIONAL_ELEMENTS=
 OPTIONAL_DIB_ARGS=
 
-if [ "$MANILA_ENABLE_CIFS_SUPPORT" != "yes" && "$MANILA_ENABLE_NFS_SUPPORT" != "yes" ]; then
+if [ "$MANILA_ENABLE_CIFS_SUPPORT" != "yes" ] && [ "$MANILA_ENABLE_NFS_SUPPORT" != "yes" ]; then
     echo "You should enable NFS or CIFS support for manila image."
 fi
 
@@ -67,11 +68,103 @@ if [ "$DISABLE_IMG_COMPRESSION" = "yes" ]; then
     OPTIONAL_DIB_ARGS="$OPTIONAL_DIB_ARGS -u"
 fi
 
-if [ "$MANILA_IMG_OS" = "manila-ubuntu-core" && "$MANILA_IMG_OS_VER" != "trusty" ]; then
+if [ "$MANILA_IMG_OS" = "manila-ubuntu-core" ] && [ "$MANILA_IMG_OS_VER" != "trusty" ]; then
     echo "manila-ubuntu-core doesn't support '$MANILA_IMG_OS_VER' release."
     echo "Change MANILA_IMG_OS to 'ubuntu' if you need another release."
 fi
 
+# Verify dependencies
+# -------------------
+if [ -e /etc/os-release ]; then
+    platform=$(cat /etc/os-release | awk -F= '/^ID=/ {print tolower($2);}')
+    # remove eventual quotes around ID=...
+    platform=$(echo $platform | sed -e 's,^",,;s,"$,,')
+elif [ -e /etc/system-release ]; then
+    case "$(head -1 /etc/system-release)" in
+        "Red Hat Enterprise Linux Server"*)
+            platform=rhel
+            ;;
+        "CentOS"*)
+            platform=centos
+            ;;
+        *)
+            echo -e "Unknown value in /etc/system-release. Impossible to build images.\nAborting"
+            exit 2
+            ;;
+    esac
+else
+    echo -e "Unknown host OS. Impossible to build images.\nAborting"
+    exit 2
+fi
+
+is_installed() {
+    if [ "$platform" = 'ubuntu' ]; then
+        dpkg -s "$1" &> /dev/null
+    else
+        # centos, fedora, opensuse, or rhel
+        if ! rpm -q "$1" &> /dev/null; then
+            rpm -q "$(rpm -q --whatprovides "$1")"
+        fi
+    fi
+}
+
+need_required_packages() {
+    case "$platform" in
+        "ubuntu")
+            package_list="qemu kpartx"
+            ;;
+        "fedora")
+            package_list="qemu-img kpartx"
+            ;;
+        "opensuse")
+            package_list="qemu kpartx"
+            ;;
+        "rhel" | "centos")
+            package_list="qemu-kvm qemu-img kpartx"
+            ;;
+        *)
+            echo -e "Unknown platform '$platform' for the package list.\nAborting"
+            exit 2
+            ;;
+    esac
+
+    for p in `echo $package_list`; do
+        if ! is_installed $p; then
+            return 0
+        fi
+    done
+    return 1
+}
+
+if need_required_packages; then
+    # install required packages if requested
+    if [ -n "$DIB_UPDATE_REQUESTED" ]; then
+        case "$platform" in
+            "ubuntu")
+                sudo apt-get install $package_list -y
+                ;;
+            "opensuse")
+                sudo zypper --non-interactive --gpg-auto-import-keys in $package_list
+                ;;
+            "fedora" | "rhel" | "centos")
+                if [ ${platform} = "centos" ]; then
+                    # install EPEL repo, in order to install argparse
+                    sudo rpm -Uvh --force http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
+                fi
+                sudo yum install $package_list -y
+                ;;
+            *)
+                echo -e "Unknown platform '$platform' for installing packages.\nAborting"
+                exit 2
+                ;;
+        esac
+    else
+        echo "Missing one of the following packages: $package_list"
+        echo "Please install manually or rerun with the update option (-u)."
+        exit 1
+    fi
+fi
+
 # Export diskimage-builder settings
 # ---------------------------------
 export DIB_DEFAULT_INSTALLTYPE=package

tools/gate/build_images

@@ -0,0 +1,7 @@
+#!/bin/bash -xe
+
+IMAGE=$1
+
+if [ "$IMAGE" = "generic" ]; then
+    tox -e buildimage
+fi