miaou-create template sandbox

.vscode/settings.json

@@ -23,6 +23,11 @@
         "**/*.txt",
         "**/*.mdown",
         "**/*.md",
-        "**/*.container"
-    ]
+        "**/*.container",
+        "**/miaou-*",
+    ],
+    "todohighlight.enableDiagnostics": true,
+    "todohighlight.toggleURI": true,
+    "bashIde.enableSourceErrorDiagnostics": true,
+    "bashIde.includeAllWorkspaceSymbols": false
 }

README.md

@@ -1,4 +1,5 @@
 miaou-incus
 ===========
 
-incus with lots of convention
+incus customized along opinionated conventions plus additional tools
+

tools/miaou-create

@@ -3,9 +3,13 @@
 # CONSTANTS
 
 BASEDIR=$(dirname "$0")
-DEBIAN='images:debian/13'
+MIAOU_IMAGE=images:debian/13
 APT_ARCHIVES=/var/cache/apt/archives
-CONTAINER=''
+PROJECT_SANDBOX=sandbox
+TEMPLATE_SANDBOX=miaou-debian13-template
+TEMPLATE_REFRESH_DELAY="7 days"
+
+CONTAINER=
 
 # FUNCTIONS
 
@@ -13,6 +17,28 @@ function usage {
     echo "$(basename "$0") <CONTAINER_NAME>"
 }
 
+function humanize_ago {
+    local seconds=$(($(date +%s) - $(date -d "$1" +%s)))
+
+    local days=$((seconds / 86400))
+    local hours=$(((seconds % 86400) / 3600))
+    local minutes=$(((seconds % 3600) / 60))
+
+    if ((days > 365)); then
+        echo "$((days / 365)) year(s) ago"
+    elif ((days > 30)); then
+        echo "$((days / 30)) month(s) ago"
+    elif ((days > 0)); then
+        echo "$days day(s) ago"
+    elif ((hours > 0)); then
+        echo "$hours hour(s) ago"
+    elif ((minutes > 0)); then
+        echo "$minutes minute(s) ago"
+    else
+        echo "$seconds second(s) ago"
+    fi
+}
+
 function parse_options {
     while [[ $# -gt 0 ]]; do
         case "$1" in
@@ -31,56 +57,98 @@ function parse_options {
         shift 1 # Move to the next argument
     done
     [[ -n $CONTAINER ]] || (usage && exit 1)
+}
 
+function create {
+    incus --project "$PROJECT_SANDBOX" copy "$TEMPLATE_SANDBOX" "$CONTAINER" --target-project $(incus project get-current)
+    incus file delete "$CONTAINER/etc/machine-id"
+    incus start "$CONTAINER"
+    customize_host "$CONTAINER"
 }
 
-# cold changes
-function before_start {
-	if [[ -v MIAOU_BASH_DIR ]]; then
-		incus config device add $CONTAINER MIAOU-BASH disk source=$MIAOU_BASH_DIR path=/opt/miaou-bash readonly=true | grep -q 'Device MIAOU-BASH added'
-		incus config set $CONTAINER environment.PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/miaou-bash/tools
-	else
-		echo >&2 "Warn: variable MIAOU_BASH_DIR missing!"
-	fi
+function mount_miaou_bash {
+    [[ -v MIAOU_BASH_DIR ]] && echo >&2 "Warn: variable MIAOU_BASH_DIR missing!" && return
+    local target="$1"
+    local optional_project=${2:-}
+    [[ -n $optional_project ]] && optional_project="--project $optional_project"
+    incus $optional_project config device add $target MIAOU-BASH disk source=$MIAOU_BASH_DIR path=/opt/miaou-bash readonly=true | grep -q 'Device MIAOU-BASH added'
+    incus $optional_project config set $target environment.PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/miaou-bash/tools
+}
+
+function build_sandbox_project {
+    incus project show $PROJECT_SANDBOX > /dev/null || incus project create $PROJECT_SANDBOX
+}
 
-	incus config device add $CONTAINER MIAOU-HOSTED-ARCHIVES disk source=$APT_ARCHIVES path=/var/cache/apt-hosted-archives readonly=true | grep -q 'Device MIAOU-HOSTED-ARCHIVES added'
-	incus file delete $CONTAINER/etc/apt/sources.list
-	incus file push --uid 0 --gid 0 --mode 644 --create-dirs /etc/apt/sources.list.d/debian.sources $CONTAINER/etc/apt/sources.list.d/debian.sources
+function refresh_template {
+    incus --project "$PROJECT_SANDBOX" start "$TEMPLATE_SANDBOX"
+    incus --project "$PROJECT_SANDBOX" exec "$TEMPLATE_SANDBOX" -- bash << EOF
+        apt-get update
+        apt-get dist-upgrade -y
+        apt-get install -y curl
+	    /opt/miaou-bash/install.sh
+EOF
+    incus --project "$PROJECT_SANDBOX" stop "$TEMPLATE_SANDBOX"
+    local image_date=$(incus --project "$PROJECT_SANDBOX" list "$TEMPLATE_SANDBOX" -f compact,noheader -cl)
+    echo "template refreshed at: $image_date"
+}
 
-	cat << EOF | incus file push --uid 0 --gid 0 --mode 644 --create-dirs - $CONTAINER/etc/systemd/resolved.conf.d/10-disable-ipv4-listener.conf
+function build_template_from_scratch {
+    build_sandbox_project
+    echo "building image from scratch..."
+    incus --project "$PROJECT_SANDBOX" file delete "$TEMPLATE_SANDBOX"/etc/apt/sources.list
+    incus --project "$PROJECT_SANDBOX" file push --uid 0 --gid 0 --mode 644 --create-dirs /etc/apt/sources.list.d/debian.sources "$TEMPLATE_SANDBOX"/etc/apt/sources.list.d/debian.sources
+    cat << EOF | incus --project "$PROJECT_SANDBOX" file push --uid 0 --gid 0 --mode 644 --create-dirs - "$TEMPLATE_SANDBOX"/etc/systemd/resolved.conf.d/10-disable-ipv4-listener.conf
 [Resolve]
 LLMNR=no
 DNSStubListener=no
 EOF
+    mount_miaou_bash "$TEMPLATE_SANDBOX" "$PROJECT_SANDBOX"
 
+    incus --project "$PROJECT_SANDBOX" create "$MIAOU_IMAGE" "$TEMPLATE_SANDBOX"
+    refresh_template
+    echo "image:"$TEMPLATE_SANDBOX" from project:$PROJECT_SANDBOX built successfully!"
 }
 
-# hot changes
-function after_start {
-	# FIXME: should be done in some other way
-	incus exec "$CONTAINER" -- apt-get update
-	incus exec "$CONTAINER" -- apt-get install -y curl
-
-	incus exec "$CONTAINER" -- /opt/miaou-bash/install.sh
+function prepare_template_for_quick_creation {
+    local image_date=$(incus list "$TEMPLATE_SANDBOX" -f compact,noheader -cl --project "$PROJECT_SANDBOX")
+    if [[ -z $image_date ]]; then
+        build_template_from_scratch
+    else
+        local true_date=$(date -d "$image_date" +%s)
+        local expiration_date=$(date -d "$TEMPLATE_REFRESH_DELAY ago" +%s)
+        if ((true_date < expiration_date)); then
+            echo "template exists $(humanize_ago "$image_date"), needs a refresh..."
+            refresh_template
+        else
+            :
+            # echo "template already exists $(humanize_ago "$image_date")!"
+        fi
+    fi
+}
 
+function customize_host {
+    local target="$1"
     local domain=$(incus network get incusbr0 dns.domain)
     domain=${domain:-incus}
-	cat << EOF | incus file push --uid 0 --gid 0 --mode 644 --create-dirs - $CONTAINER/etc/hosts
-127.0.1.1	$CONTAINER.$domain $CONTAINER
+    cat << EOF | incus file push --uid 0 --gid 0 --mode 644 --create-dirs - $target/etc/hosts
+127.0.1.1	$target.$domain $target
 127.0.0.1	localhost
 EOF
 }
 
-function create {
-	incus create $DEBIAN $CONTAINER
-	before_start
-	incus start $CONTAINER
-	after_start
+function assert_not_sandboxing {
+    [[ $(incus project get-current) == "$PROJECT_SANDBOX" ]] \
+        && echo ERROR: actual sandboxing project, please switch back to your 'default' project >&2 \
+        && exit 30 \
+        || true
 }
 
 # MAIN
 
 set -Eue
-parse_options $*
+parse_options "$@"
+
+assert_not_sandboxing
+prepare_template_for_quick_creation
 create
 echo Success