templates: split template:alpine to template:alpine-{3.21,3.22,3.23}

Alpine Linux supports multiple concurrent minor releases, so
template:alpine should be split into versioned templates, similar to
template:debian-{11,12,13} and template:almalinux-{8,9,10}.

Changes:
- Add versioned image templates: _images/alpine-{3.21,3.22,3.23}.yaml
- Add versioned top-level templates: alpine-{3.21,3.22,3.23}.yaml
- Make template:alpine an alias for template:alpine-3.23 (latest)
- Update hack/update-template-alpine.sh to preserve the minor version
  from the template URL instead of defaulting to latest-stable, so it
  only updates the patch release within the same minor version
- Update templates/README.md with the new versioned entries

Signed-off-by: Mysterio-17 <mradultiwari1708@gmail.com>

hack/update-template-alpine.sh

@@ -134,7 +134,7 @@ function alpine_cache_key_for_image_kernel() {
 }
 
 function alpine_image_entry_for_image_kernel() {
-	local location=$1 kernel_is_not_supported=$2 overriding=${3:-'{"path_version":"latest-stable"}'} url_spec image_entry=''
+	local location=$1 kernel_is_not_supported=$2 overriding=${3:-'{}'} url_spec image_entry=''
 	[[ ${kernel_is_not_supported} == "null" ]] || echo "Updating kernel information is not supported on Alpine Linux" >&2
 	url_spec=$(alpine_url_spec_from_location "${location}" | jq -r ". + ${overriding}")
 	image_entry=$(alpine_latest_image_entry_for_url_spec "${url_spec}")
@@ -253,7 +253,8 @@ if ! jq -e '.path_version' <<<"${overriding}" >/dev/null; then # --version-major
 elif [[ -n ${version_major} || -n ${version_minor} ]]; then # --version-major-minor is specified
 	echo "Ignoring --version-major and --version-minor because --version-major-minor is specified" >&2
 fi
-[[ ${overriding} == "{}" ]] && overriding='{"path_version":"latest-stable"}'
+# When no version is specified, the script preserves the minor version from the template URL.
+# This ensures only the patch release is updated, not the minor release.
 
 if [[ ${#templates[@]} -eq 0 ]]; then
 	alpine_print_help

templates/README.md

@@ -38,7 +38,9 @@ lima
 - [`almalinux-9`](./almalinux-9.yaml): AlmaLinux 9
 - [`almalinux-10`](./almalinux-10.yaml), `almalinux`: AlmaLinux 10
 - [`almalinux-kitten-10`](./almalinux-kitten-10.yaml), `almalinux-kitten`: AlmaLinux Kitten 10
-- [`alpine`](./alpine.yaml): ☆Alpine Linux
+- [`alpine-3.21`](./alpine-3.21.yaml): Alpine Linux 3.21
+- [`alpine-3.22`](./alpine-3.22.yaml): Alpine Linux 3.22
+- [`alpine-3.23`](./alpine-3.23.yaml), `alpine`: ☆Alpine Linux 3.23
 - [`alpine-iso`](./alpine-iso.yaml): ☆Alpine Linux (ISO9660 image). Compatible with the `alpine` template used in Lima prior to v1.0.
 - [`archlinux`](./archlinux.yaml): ☆Arch Linux
 - [`centos-stream-9`](./centos-stream-9.yaml), `centos-stream`: CentOS Stream 9

templates/_images/alpine-3.21.yaml

@@ -0,0 +1,7 @@
+images:
+- location: "https://dl-cdn.alpinelinux.org/alpine/v3.21/releases/cloud/nocloud_alpine-3.21.7-x86_64-uefi-cloudinit-r0.qcow2"
+  arch: "x86_64"
+  digest: "sha512:779afcc0bfdd4074ca620bb67c2f70f3d6cad4cdaf4fd91a9fd8a127feb159d9407be18cd8f778ed1adf950799cd93b2692d49ad7ee2221ed6a52d8e895d4c37"
+- location: "https://dl-cdn.alpinelinux.org/alpine/v3.21/releases/cloud/nocloud_alpine-3.21.7-aarch64-uefi-cloudinit-r0.qcow2"
+  arch: "aarch64"
+  digest: "sha512:9837b968763c2f620aa81cab3dc26b7f914ffa935245c9e929e339559f0f2fecdfd281e5cf82457ecfd6a9b6726a8a8ec40fb35d99dd8fd9b27d3b76c304dac7"

templates/_images/alpine-3.22.yaml

@@ -0,0 +1,7 @@
+images:
+- location: "https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/cloud/nocloud_alpine-3.22.4-x86_64-uefi-cloudinit-r0.qcow2"
+  arch: "x86_64"
+  digest: "sha512:1b8743fccfd92d8b690e5a75972bebe5d6826b2ea94bc7c71ede3a2a39a5535cbb4e49a6a3f42852d1e05d63076c6f1fbc29ddbb63d766101eaa9dadcaebbb1f"
+- location: "https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/cloud/nocloud_alpine-3.22.4-aarch64-uefi-cloudinit-r0.qcow2"
+  arch: "aarch64"
+  digest: "sha512:a53620902f99b1fd4591125d348e4385f036d590607f4fa90d6f85fea0248007ec763cc81d025f347ede5bd746b3726cf5eddd461b6c94c35376f71cb7558317"

templates/alpine-3.21.yaml

@@ -0,0 +1,15 @@
+minimumLimaVersion: 2.0.0
+
+base:
+- template:_images/alpine-3.21
+- template:_default/mounts
+
+# The built-in containerd installer does not support Alpine currently.
+# Use a provisioning script to install containerd, buildkit, and nerdctl.
+#
+# NOTE: Starting with Lima v2.0, nerdctl version must be v2.1.6 or later to
+# enable port forwarding in rootful mode.
+# Available in apk since Alpine 3.22.
+containerd:
+  system: false
+  user: false

templates/alpine-3.22.yaml

@@ -0,0 +1,15 @@
+minimumLimaVersion: 2.0.0
+
+base:
+- template:_images/alpine-3.22
+- template:_default/mounts
+
+# The built-in containerd installer does not support Alpine currently.
+# Use a provisioning script to install containerd, buildkit, and nerdctl.
+#
+# NOTE: Starting with Lima v2.0, nerdctl version must be v2.1.6 or later to
+# enable port forwarding in rootful mode.
+# Available in apk since Alpine 3.22.
+containerd:
+  system: false
+  user: false

templates/alpine-3.23.yaml

@@ -0,0 +1,15 @@
+minimumLimaVersion: 2.0.0
+
+base:
+- template:_images/alpine-3.23
+- template:_default/mounts
+
+# The built-in containerd installer does not support Alpine currently.
+# Use a provisioning script to install containerd, buildkit, and nerdctl.
+#
+# NOTE: Starting with Lima v2.0, nerdctl version must be v2.1.6 or later to
+# enable port forwarding in rootful mode.
+# Available in apk since Alpine 3.22.
+containerd:
+  system: false
+  user: false

templates/alpine.yaml

@@ -1,15 +0,0 @@
-minimumLimaVersion: 2.0.0
-
-base:
-- template:_images/alpine
-- template:_default/mounts
-
-# The built-in containerd installer does not support Alpine currently.
-# Use a provisioning script to install containerd, buildkit, and nerdctl.
-#
-# NOTE: Starting with Lima v2.0, nerdctl version must be v2.1.6 or later to
-# enable port forwarding in rootful mode.
-# Available in apk since Alpine 3.22.
-containerd:
-  system: false
-  user: false

templates/alpine.yaml

@@ -0,0 +1 @@
+alpine-3.23.yaml