Inital commit.

images/linux/scripts/helpers/apt.sh

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+#!/bin/bash
+################################################################################
+##  File:  apt.sh
+##  Desc:  This script contains helper functions for using dpkg and apt
+################################################################################
+
+## Use dpkg to figure out if a package has already been installed
+## Example use:
+## if ! IsInstalled packageName; then
+##     echo "packageName is not installed!"
+## fi
+function IsInstalled {
+    dpkg -S $1 &> /dev/null
+}
+
+# Configure apt to always assume Y
+echo "APT::Get::Assume-Yes \"true\";" > /etc/apt/apt.conf.d/90assumeyes
+
+# Use apt-fast for parallel downloads
+apt-get install aria2
+add-apt-repository -y ppa:apt-fast/stable
+apt-get update
+apt-get -y install apt-fast

images/linux/scripts/helpers/containercache.sh

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+#!/bin/bash
+
+source $HELPER_SCRIPTS/apt.sh
+source $HELPER_SCRIPTS/document.sh
+
+# Check prereqs
+echo "Checking prereqs for image pulls"
+if ! command -v docker; then
+    echo "Docker is not installed, cant pull images"
+    exit 1
+fi
+
+# Information output
+systemctl status docker --no-pager
+
+# Pull images
+images=(
+    docker.io/jekyll/builder
+    mcr.microsoft.com/azure-pipelines/node8-typescript
+)
+
+for image in "${images[@]}"; do
+    docker pull "$image"
+done
+
+## Add container information to the metadata file
+ DocumentInstalledItem "Cached container images"
+
+while read -r line; do
+    DocumentInstalledItemIndent "$line"
+done <<< "$(docker images --digests --format '{{.Repository}}:{{.Tag}} (Digest: {{.Digest}})')"

images/linux/scripts/helpers/document.sh

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+#!/bin/bash
+################################################################################
+##  File:  document.sh
+##  Desc:  Helper functions for writing information to the metadata document
+################################################################################
+
+function WriteItem {
+    if [ -z "$METADATA_FILE" ]; then
+        echo "METADATA_FILE environment variable must be set to output to Metadata Document!"
+        return 1;
+    else
+        echo -e "$1" >> "$METADATA_FILE"
+    fi
+}
+
+function AddTitle {
+    WriteItem "# $1"
+}
+
+function AddSubTitle {
+    WriteItem "## $1"
+}
+
+function DocumentInstalledItem {
+    WriteItem "- $1"
+}
+
+function DocumentInstalledItemIndent {
+    WriteItem "  - $1"
+}