Output file to use after update

src/AutoUpdate.cake

@@ -35,7 +35,9 @@
 (def-introspect-struct auto-update-download
   operating-system ([] 32 char)
   architecture ([] 32 char)
-  url ([] 1024 char))
+  url ([] 1024 char)
+  ;; After the update, this file should be used for the latest version (e.g. executable or DLL)
+  file-to-use ([] 1024 char))
 
 (def-introspect-struct auto-update-metadata
   name ([] 64 char)
@@ -44,20 +46,20 @@
 
 (def-type-alias-global CURL void)
 
-(defun auto-update-get-current-platform-download-url (update-data (* auto-update-metadata)
-                                                      &return (* (const char)))
+(defun auto-update-get-current-platform-download (update-data (* auto-update-metadata)
+                                                  &return (* auto-update-download))
   (each-item-addr-in-dynarray (path update-data > downloads) i download (* auto-update-download)
     (comptime-cond
      ('Windows
       (when (and
              (= 0 (strcmp "Windows" (path download > operating-system)))
              (= 0 (strcmp "x64" (path download > architecture))))
-        (return (path download > url))))
+        (return download)))
      ('Unix
       (when (and
              (= 0 (strcmp "Linux" (path download > operating-system)))
              (= 0 (strcmp "x64" (path download > architecture))))
-        (return (path download > url))))))
+        (return download)))))
   (return null))
 
 ;; TODO: Add version header
@@ -116,9 +118,13 @@
 ;; zip Machsearch_Linux-x64.zip machsearch
 ;; ./cryptography-cli create-signed-file Machsearch_Linux-x64.zip ~/website/updates/Machsearch/Machsearch_Linux-x64.auto-update
 ;; The download will only occur if the latest version is greater than current-application-version.
+;; new-file-to-use-out-buffer will only be set if there was actually a newer file
 (defun auto-update-download (curl (* CURL) public-key (* (unsigned char))
                              update-cakedata-url (* (const char))
                              current-application-version int
+                             output-directory (* (const char))
+                             new-file-to-use-out-buffer (* char)
+                             new-file-to-use-out-buffer-size size_t
                              &return bool)
   (var update-metadata auto-update-metadata (array 0))
   (unless (auto-update-get-latest-version-metadata
@@ -129,8 +135,13 @@
     (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
     (return false))
 
-  (var platform-update-url (* (const char))
-    (auto-update-get-current-platform-download-url (addr update-metadata)))
+  (var platform-download (* auto-update-download)
+    (auto-update-get-current-platform-download (addr update-metadata)))
+  (unless platform-download
+    (fprintf stderr "Could not find update for this platform\n")
+    (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
+    (return false))
+  (var platform-update-url (* (const char)) (path platform-download > url))
 
   (scope ;; Print results
    (fprintf stderr "Latest version of %s is %d.\nDownloads:\n"
@@ -144,6 +155,7 @@
 
   (when (>= current-application-version (field update-metadata latest-version))
     (fprintf stderr "The application is already up-to-date.\n")
+    (set (at 0 new-file-to-use-out-buffer) 0)
     (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
     (return true))
 
@@ -155,20 +167,22 @@
     (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
     (return false))
 
-  (var output-directory ([] 1024 char) (array 0))
-  (sprintf output-directory "v%d" (field update-metadata latest-version))
-  (unless (make-directory output-directory)
+  (var version-output-directory ([] 1024 char) (array 0))
+  (sprintf version-output-directory "%s/v%d" output-directory (field update-metadata latest-version))
+  (unless (make-directory version-output-directory)
     (free verified-payload)
     (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
     (return false))
   (unless (decompress-zip-from-memory-to-files
            verified-payload (type-cast verified-payload-size size_t)
-           output-directory)
+           version-output-directory)
     (free verified-payload)
     (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
     (return false))
   (free verified-payload)
 
+  (snprintf new-file-to-use-out-buffer new-file-to-use-out-buffer-size "%s/%s"
+            version-output-directory (path platform-download > file-to-use))
   (free-introspect-struct-fields auto-update-metadata--metadata (addr update-metadata) free)
   (return true))
 
@@ -188,6 +202,8 @@
     (var update-cakedata-url (* (const char))
       "https://localhost:8888/updates/Machsearch/machsearch.cakedata")
     (var current-version int 0)
+    (var output-directory (* (const char)) ".")
+    (var new-file-to-use ([] 2048 char) (array 0))
 
     (when (!= (curl_global_init CURL_GLOBAL_DEFAULT) 0)
       (fprintf stderr "error: Failed to initialize curl\n")
@@ -199,11 +215,14 @@
       (curl_global_cleanup)
       (return 1))
 
-    (unless (auto-update-download curl macoy-public-key update-cakedata-url current-version)
+    (unless (auto-update-download curl macoy-public-key update-cakedata-url current-version
+                                  output-directory new-file-to-use (sizeof new-file-to-use))
       (curl_easy_cleanup curl)
       (curl_global_cleanup)
       (return 1))
 
+    (fprintf stderr "The update says I should use %s\n" new-file-to-use)
+
     (curl_easy_cleanup curl)
     (curl_global_cleanup)
     (return 0))))