HBSD: add basic error handling

Signed-off-by: Oliver Pinter <oliver.pinter@hardenedbsd.org>

release/git/update_meta.py

@@ -5,11 +5,21 @@ import os.path
 
 cwd = os.path.basename(os.getcwd())
 
-with open("CHECKSUM.SHA512", "r") as f:
-    checksum = f.read()
-
-with  open("CHECKSUM.SHA512.asc", "r") as f:
-    signature = f.read()
+try:
+    with open("CHECKSUM.SHA512", "r") as f:
+        checksum = f.read()
+    update_checksum = True
+except:
+    print("missing CHECKSUM.SHA512 file!")
+    update_checksum = False
+
+try:
+    with  open("CHECKSUM.SHA512.asc", "r") as f:
+        signature = f.read()
+    update_signature = True
+except:
+    print("missing CHECKSUM.SHA512.asc file!")
+    update_signature = False
 
 with open("drupal-{version}.template".format(version=cwd), "r") as f:
     drupal_template = f.read()
@@ -34,17 +44,17 @@ github_text = "\n".join(github_formatted_lines)
 drupal_text = "\n".join(drupal_formatted_lines)
 
 with open("drupal-{version}.txt".format(version=cwd), "w+") as f:
-    drupal = (drupal_template
-                .replace("%%NOTES%%", drupal_text)
-                .replace("%%CHECKSUM%%", checksum)
-                .replace("%%SIGNATURE%%", signature)
-                )
+    drupal = drupal_template.replace("%%NOTES%%", drupal_text)
+    if update_checksum:
+        drupal = drupal.replace("%%CHECKSUM%%", checksum)
+    if update_signature:
+        drupal = drupal.replace("%%SIGNATURE%%", signature)
     f.write(drupal)
 
 with open("github-{version}.txt".format(version=cwd), "w+") as f:
-    github = (github_template
-                .replace("%%NOTES%%", github_text)
-                .replace("%%CHECKSUM%%", checksum)
-                .replace("%%SIGNATURE%%", signature)
-                )
+    github = github_template.replace("%%NOTES%%", github_text)
+    if update_checksum:
+        github = github.replace("%%CHECKSUM%%", checksum)
+    if update_signature:
+        github = github.replace("%%SIGNATURE%%", signature)
     f.write(github)