Generate a version number file.

run.py

@@ -12,6 +12,7 @@
 import argparse
 import os
 from pathlib import Path
+from datetime import datetime, UTC
 import subprocess
 
 def main():
@@ -20,7 +21,27 @@ def main():
     parser.add_argument("--install-path", type=str)
     args = parser.parse_args()
 
+    prep_install_directory(args.install_path)
     export_vcs(args.project_dir, args.install_path)
+    generate_version_number(args.install_path)
+
+def prep_install_directory(install_path):
+    # Make the install directory if it doesn't exist.
+    mkdir_command = "mkdir -p {}".format(install_path)
+    subprocess.run(mkdir_command, shell=True)
+
+def generate_version_number(install_path):
+    # Try to get the version info from the environment.
+    version_number = os.environ.get("J7S_VERSION_NUMBER")
+    # If we can't assign a date/time.
+    if not version_number:
+        now = datetime.now(UTC)
+        version_number = now.strftime("%Y.%m.%d.%H.%M")
+
+    # Save in install space.
+    output_file = install_path + "/version_number"
+    with open(output_file, 'w') as output:
+        print(version_number, file=output)
 
 def export_vcs(project_directory, install_path):
     if not project_directory:
@@ -32,10 +53,6 @@ def export_vcs(project_directory, install_path):
     # Find src directory from project directory.
     src_directory = project_directory / "src"
 
-    # Make the install directory if it doesn't exist.
-    mkdir_command = "mkdir -p {}".format(install_path)
-    subprocess.run(mkdir_command, shell=True)
-
     # Where we're going to save the output.
     output_file = install_path + "/project_state.repos"