hack: list versions with find-image script

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

hack/find-image/find-image.sh

@@ -3,20 +3,37 @@
 #
 # SPDX-License-Identifier: AGPL-3.0-only
 
-# Usage: find-image.sh
-
 set -euo pipefail
 shopt -s inherit_errexit
 
 ref="-"
 stream="stable"
+json=false
+cdn_url="https://cdn.confidential.cloud"
+
+function usage() {
+  cat <<'EOF'
+Usage: find-image.sh [options] [command]
+
+Options:
+  -r, --ref <ref>        Ref to search for (default: "-")
+  -s, --stream <stream>  Stream to search for (default: "stable")
+  --json                 Output JSON instead of shortname(s)
+  --help                 Show this help
+
+Commands:
+  latest                 Find latest image for ref and stream
+  list                   List all images for ref and stream
+EOF
+}
 
 POSITIONAL_ARGS=()
 
 while [[ $# -gt 0 ]]; do
   case $1 in
   -r | --ref)
-    ref="$2"
+    # Canonicalize ref format (e.g. "feat/foo/bar" -> "feat-foo-bar")
+    ref=$(echo -n "$2" | tr -c '[:alnum:]' '-')
     shift # past argument
     shift # past value
     ;;
@@ -25,8 +42,18 @@ while [[ $# -gt 0 ]]; do
     shift # past argument
     shift # past value
     ;;
+  --json)
+    json=true
+    shift # past argument
+    ;;
+  --help)
+    usage
+    exit 0
+    ;;
   -*)
     echo "Unknown option $1"
+    echo
+    usage
     exit 1
     ;;
   *)
@@ -38,25 +65,98 @@ done
 
 set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters
 
-ref=$(echo -n "${ref}" | tr -c '[:alnum:]' '-')
-
-base_url="https://cdn.confidential.cloud"
-latest_path="constellation/v1/ref/${ref}/stream/${stream}/versions/latest/image.json"
-latest_url="${base_url}/${latest_path}"
-latest_status=$(curl -s -o /dev/null -w "%{http_code}" "${latest_url}")
-if [[ ${latest_status} != "200" ]]; then
-  echo "No image found for ref ${ref} and stream ${stream} (${latest_status})"
-  exit 1
-fi
-latest_version=$(curl -sL "${latest_url}" | jq -r '.version')
-
+# shortname <ref> <stream> <version>
+function shortname() {
   shortname=""
+
   if [[ ${ref} != "-" ]]; then
-  shortname+="ref/${ref}/"
+    shortname+="ref/${1}/"
   fi
+
   if [[ ${stream} != "stable" ]]; then
-  shortname+="stream/${stream}/"
+    shortname+="stream/${2}/"
   fi
-shortname+="${latest_version}"
+
+  shortname+="${3}"
 
   echo "${shortname}"
+}
+
+function latest() {
+  latest_path="constellation/v1/ref/${ref}/stream/${stream}/versions/latest/image.json"
+  latest_url="${cdn_url}/${latest_path}"
+
+  latest_status=$(curl -s -o /dev/null -w "%{http_code}" "${latest_url}")
+  if [[ ${latest_status} != "200" ]]; then
+    echo "[Error] No image found for ref ${ref} and stream ${stream} (${latest_status})"
+    exit 1
+  fi
+
+  latest_json=$(curl -sL "${latest_url}")
+
+  if [[ ${json} == true ]]; then
+    jq <<<"${latest_json}"
+    exit 0
+  fi
+
+  latest_version=$(echo "${latest_json}" | jq -r '.version')
+
+  shortname "${ref}" "${stream}" "${latest_version}"
+  exit 0
+}
+
+function list() {
+  major="v2"
+  list_path="constellation/v1/ref/${ref}/stream/${stream}/versions/major/${major}/image.json"
+  list_url="${cdn_url}/${list_path}"
+
+  list_status=$(curl -s -o /dev/null -w "%{http_code}" "${list_url}")
+  if [[ ${list_status} != "200" ]]; then
+    echo "[Error] No minor image list found for ref ${ref} and stream ${stream} and version ${major} (${list_status})"
+    exit 1
+  fi
+
+  minor_list=$(curl -sL "${list_url}" | jq -r '.versions[]')
+
+  for minor in ${minor_list}; do
+    list_path="constellation/v1/ref/${ref}/stream/${stream}/versions/minor/${minor}/image.json"
+    list_url="${cdn_url}/${list_path}"
+
+    list_status=$(curl -s -o /dev/null -w "%{http_code}" "${list_url}")
+    if [[ ${list_status} != "200" ]]; then
+      echo "[Error] No patch image list found for ref ${ref} and stream ${stream} and version ${minor} (${list_status})"
+      exit 1
+    fi
+
+    patch_list="${patch_list-""} $(curl -sL "${list_url}" | jq -r '.versions[]')"
+  done
+
+  if [[ ${json} == true ]]; then
+    out="{}"
+    out=$(jq <<<"${out}" --arg ref "${ref}" '.ref = $ref')
+    out=$(jq <<<"${out}" --arg stream "${stream}" '.stream = $stream')
+    for patch in ${patch_list}; do
+      out=$(jq <<<"${out}" --arg patch "${patch}" '.versions += [$patch]')
+    done
+    jq <<<"${out}"
+    exit 0
+  fi
+
+  for version in ${patch_list}; do
+    shortname "${ref}" "${stream}" "${version}"
+  done
+  exit 0
+}
+
+
+case ${1-"latest"} in
+"list")
+  list
+  ;;
+"latest")
+  latest
+  ;;
+*)
+  echo "Unknown command $1"
+  ;;
+esac