Refactor update-template-ubuntu.sh and add update-template-debian.sh

hack/cache-common-inc.sh

@@ -1,5 +1,11 @@
 #!/usr/bin/env bash
 
+# print the error message and exit with status 1
+function error_exit() {
+ echo "Error: $*" >&2
+ exit 1
+}
+
 # e.g.
 # ```console
 # $ download_template_if_needed templates/default.yaml
@@ -209,8 +215,7 @@ function location_to_sha256() {
  elif command -v shasum >/dev/null; then
  sha256="$(echo -n "${location}" | shasum -a 256 | cut -d' ' -f1)"
  else
- echo "sha256sum or shasum not found" >&2
- exit 1
+ error_exit "sha256sum or shasum not found"
  fi
  echo "${sha256}"
  )
@@ -351,16 +356,32 @@ function hash_file() {
 # /Users/user/Library/Caches/lima/download/by-url-sha256/346ee1ff9e381b78ba08e2a29445960b5cd31c51f896fc346b82e26e345a5b9a/data # on macOS
 # /home/user/.cache/lima/download/by-url-sha256/346ee1ff9e381b78ba08e2a29445960b5cd31c51f896fc346b82e26e345a5b9a/data # on others
 function download_to_cache() {
- local code_time_type_url
- code_time_type_url=$(
- curl -sSLI -w "%{http_code}\t%header{Last-Modified}\t%header{Content-Type}\t%{url_effective}" "$1" -o /dev/null
- )
+ local cache_path
+ cache_path=$(location_to_cache_path "$1")
+ # before checking remote location, check if the data file is already downloaded and the time file is updated within 10 minutes
+ if [[ -f ${cache_path}/data && -n "$(find "${cache_path}/time" -mmin -10 || true)" ]]; then
+ echo "${cache_path}/data"
+ return
+ fi
+
+ # check the remote location
+ local curl_info_json write_out
+ write_out='{
+ "http_code":%{http_code},
+ "last_modified":"%header{Last-Modified}",
+ "content_type":"%{content_type}",
+ "url":"%{url_effective}",
+ "filename":"%{filename_effective}"
+ }'
+ curl_info_json=$(curl -sSLI -w "${write_out}" "$1" -o /dev/null)
 
  local code time type url
- IFS=$'\t' read -r code time type url filename <<<"${code_time_type_url}"
- [[ ${code} == 200 ]] || exit 1
+ code=$(jq -r '.http_code' <<<"${curl_info_json}")
+ time=$(jq -r '.last_modified' <<<"${curl_info_json}")
+ type=$(jq -r '.content_type' <<<"${curl_info_json}")
+ url=$(jq -r '.url' <<<"${curl_info_json}")
+ [[ ${code} == 200 ]] || error_exit "Failed to download $1"
 
- local cache_path
  cache_path=$(location_to_cache_path "${url}")
  [[ -d ${cache_path} ]] || mkdir -p "${cache_path}"
 
@@ -369,18 +390,23 @@ function download_to_cache() {
  [[ -f ${cache_path}/time && "$(<"${cache_path}/time")" == "${time}" ]] || needs_download=1
  [[ -f ${cache_path}/type && "$(<"${cache_path}/type")" == "${type}" ]] || needs_download=1
  if [[ ${needs_download} -eq 1 ]]; then
- local code_time_type_url_filename
- code_time_type_url_filename=$(
+ curl_info_json=$(
  echo "downloading ${url}" >&2
- curl -SL -w "%{http_code}\t%header{Last-Modified}\t%header{Content-Type}\t%{url_effective}\t%{filename_effective}" --no-clobber -o "${cache_path}/data" "${url}"
+ curl -SL -w "${write_out}" --no-clobber -o "${cache_path}/data" "${url}"
  )
  local filename
- IFS=$'\t' read -r code time type url filename <<<"${code_time_type_url_filename}"
- [[ ${code} == 200 ]] || exit 1
+ code=$(jq -r '.http_code' <<<"${curl_info_json}")
+ time=$(jq -r '.last_modified' <<<"${curl_info_json}")
+ type=$(jq -r '.content_type' <<<"${curl_info_json}")
+ url=$(jq -r '.url' <<<"${curl_info_json}")
+ filename=$(jq -r '.filename' <<<"${curl_info_json}")
+ [[ ${code} == 200 ]] || error_exit "Failed to download ${url}"
  [[ "${cache_path}/data" == "${filename}" ]] || mv "${filename}" "${cache_path}/data"
  # sha256.digest seems existing if expected digest is available. so, not creating it here.
  # sha256sum "${cache_path}/data" | awk '{print "sha256:"$1}' >"${cache_path}/sha256.digest"
  echo -n "${time}" >"${cache_path}/time"
+ else
+ touch "${cache_path}/time"
  fi
  [[ -f ${cache_path}/type ]] || echo -n "${type}" >"${cache_path}/type"
  [[ -f ${cache_path}/url ]] || echo -n "${url}" >"${cache_path}/url"