Preserve an error log if the installation failed; Include the starting timestamp in the log

installer/installer/helpers.py

@@ -1,5 +1,7 @@
 import subprocess
 import sys
+import shutil
+import time
 
 from installer import app
 
@@ -27,8 +29,9 @@ def log(msg):
     app.log_file.write(bytes(msg + "\n", 'utf-8'))
     app.log_file.flush()
 
-def show_install_error(error_msg):
-    log(f'''
+def fail_with_install_error(error_msg):
+    try:
+        log(f'''
 
 Error: {error_msg}. Sorry about that, please try to:
   1. Run this installer again.
@@ -36,3 +39,10 @@ Error: {error_msg}. Sorry about that, please try to:
   3. If those steps don't help, please copy *all* the error messages in this window, and ask the community at https://discord.com/invite/u9yhsFmEkB
   4. If that doesn't solve the problem, please file an issue at https://github.com/cmdr2/stable-diffusion-ui/issues
 Thanks!''')
+
+        ts = int(time.time())
+        shutil.copy(app.LOG_FILE_NAME, f'error-{ts}.log')
+    except:
+        pass
+
+    exit(1)

installer/installer/main.py

@@ -1,8 +1,10 @@
 import os
 import sys
+from datetime import datetime
 
 sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 
+from installer import helpers
 from installer.tasks import (
     fetch_project_repo,
     apply_project_update,
@@ -15,6 +17,8 @@ tasks = [
     fetch_stable_diffusion_repo,
 ]
 
+helpers.log(f'Starting Stable Diffusion UI at {datetime.now().strftime("%d/%m/%Y %H:%M:%S")}')
+
 def run_tasks():
     for task in tasks:
         task.run()

installer/installer/tasks/fetch_project_repo.py

@@ -20,7 +20,6 @@ def run():
         if helpers.run(f'git clone {app.PROJECT_REPO_URL} "{app.project_repo_dir_path}"'):
             helpers.log("Downloaded Stable Diffusion UI")
         else:
-            helpers.show_install_error(error_msg="Could not download Stable Diffusion UI")
-            exit(1)
+            helpers.fail_with_install_error(error_msg="Could not download Stable Diffusion UI")
 
         helpers.run(f'git -c advice.detachedHead=false checkout "{branch_name}"', run_in_folder=app.project_repo_dir_path)

installer/installer/tasks/fetch_stable_diffusion_repo.py

@@ -32,8 +32,7 @@ def fetch_repo():
         if helpers.run(f'git clone {app.STABLE_DIFFUSION_REPO_URL} "{app.stable_diffusion_repo_dir_path}"'):
             helpers.log("Downloaded Stable Diffusion")
         else:
-            helpers.show_install_error(error_msg="Could not download Stable Diffusion")
-            exit(1)
+            helpers.fail_with_install_error(error_msg="Could not download Stable Diffusion")
 
         helpers.run(f'git -c advice.detachedHead=false checkout "{commit_id}"', run_in_folder=app.stable_diffusion_repo_dir_path)