Set up Prodigy to be able to read logs from file instead of buffer

emacs/init.org

@@ -3104,6 +3104,30 @@ Syntax highlighting for Dockerfiles:
 
   (leader-def-key "P" #'prodigy)
 #+END_SRC
+
+Add the ability to associate a file with a service instead of a buffer:
+#+BEGIN_SRC emacs-lisp
+  (with-eval-after-load 'prodigy
+    (defun prodigy-service-file (service)
+      "Return SERVICE file.
+
+  If SERVICE file exists, use that. If not, find the first SERVICE
+  tag that has a file and return that."
+      (let ((file (prodigy-service-or-first-tag-with service :file)))
+	(if (functionp file)
+	    (prodigy-callback-with-plist file service)
+	  file)))
+    (defun prodigy-display-process-file-or-buffer ()
+      (interactive)
+      (when-let (service (prodigy-service-at-pos))
+	(if-let (file (prodigy-service-file service))
+	    (progn
+	      (find-file-literally file)
+	      (prodigy-view-mode)
+	      (auto-revert-tail-mode))
+	  (prodigy-switch-to-process-buffer service))))
+    (general-def 'normal prodigy-mode-map "`" #'prodigy-display-process-file-or-buffer))
+#+END_SRC
 * Lola
 Some functions to make my day job easier.
 
@@ -3114,6 +3138,11 @@ Some functions to make my day job easier.
      (substitute-in-file-name (format "$WORKON_HOME/%s/bin/activate" venv))
      callback))
 
+  (defun get-latest-log ()
+    (car (last (directory-files default-directory
+				nil
+				"[[:digit:]-]+T[[:digit:]:]+\\.log"))))
+
   (defun python-service-setup (venv &optional env-file)
     (lambda (done)
       (call-with-venv
@@ -3125,10 +3154,16 @@ Some functions to make my day job easier.
 
   (prodigy-define-service
     :name "lola-server (gunicorn)"
-    :command "gunicorn"
-    :args '("-c" "server/web/gunicorn.conf.py"
-	    "-b" "127.0.0.1:7200"
-	    "bin.start_web:init_and_create_flask_app()")
+    :command "bash"
+    :args (lambda ()
+	    (list
+	     "-c"
+	     (format
+	      "gunicorn -c server/web/gunicorn.conf.py \
+  -b 127.0.0.1:7200 bin.start_web:init_and_create_flask_app\\(\\) \
+  &> %s.log"
+	      (format-time-string "%Y-%m-%dT%H:%M:%S"))))
+    :file #'get-latest-log
     :cwd "~/lola/lola-server"
     :stop-signal 'int
     :truncate-output t
@@ -3147,9 +3182,14 @@ Some functions to make my day job easier.
 
   (prodigy-define-service
     :name "travel-service"
-    :command "python"
-    :args '("bin/start_web.py")
+    :command "bash"
+    :args (lambda ()
+	    (list
+	     "-c"
+	     (format "python bin/start_web.py &> %s.log"
+		     (format-time-string "%Y-%m-%dT%H:%M:%S"))))
     :cwd "~/lola/lola-travel-service"
+    :file #'get-latest-log
     :stop-signal 'int
     :truncate-output t
     :init-async (python-service-setup "travel-service"