Check if Include folders/files do exists (in case they are removed)

Solution b) when start taking a snapshot the include list should be checked of existence first and warn about missings.

reference: bit-team#1586

Author: rafaelhdr

common/backintime.py

@@ -48,6 +48,14 @@
 
 parsers = {}
 
+def warningOnTakeSnapshot(config):
+    hasMissing, missing = snapshots.hasMissing(config.include())
+    if hasMissing:
+        msgMissing = ', '.join(missing)
+        msg = f'{_("The following folders are missing")}: {msgMissing}'
+        logger.warning(msg)
+    return True
+
 def takeSnapshotAsync(cfg, checksum = False):
     """
     Fork a new backintime process with 'backup' command which will
@@ -56,6 +64,7 @@ def takeSnapshotAsync(cfg, checksum = False):
     Args:
         cfg (config.Config): config that should be used
     """
+    warningOnTakeSnapshot(cfg)
     cmd = []
     if cfg.ioniceOnUser():
         cmd.extend(('ionice', '-c2', '-n7'))
@@ -94,6 +103,7 @@ def takeSnapshot(cfg, force = True):
     Returns:
         bool:                   ``True`` if there was an error
     """
+    warningOnTakeSnapshot(cfg)
     tools.envLoad(cfg.cronEnvFile())
     ret = snapshots.Snapshots(cfg).backup(force)
     return ret

common/po/pt_BR.po

@@ -1724,6 +1724,14 @@ msgstr "AVISO"
 msgid "Exclude {path} from future snapshots?"
 msgstr "Excluir {path} de snapshots futuros?"
 
+#: qt/app.py:1189
+msgid "The following folders are missing"
+msgstr "As seguintes pastas estão faltando"
+
+#: qt/app.py:1189
+msgid "Do you want to proceed?"
+msgstr "Deseja prosseguir?"
+
 #~ msgid " and add your user to group 'fuse'"
 #~ msgstr " e adicionar seu usuário para grupo 'fuse'"
 

common/snapshots.py

@@ -3104,6 +3104,25 @@ def lastSnapshot(cfg):
         return sids[0]
 
 
+def hasMissing(included):
+    """
+    Check if there are missing files or folders in a snapshot.
+
+    Args:
+        included (list):    list of tuples (item, info)
+
+    Returns:
+        tuple:              (bool, str) where bool is ``True`` if there are
+                            missing files or folders and str is a message
+                            describing the missing files or folders
+    """
+    notFound = []
+    for path, info in included:
+        if not os.path.exists(path):
+            notFound.append(path)
+    return bool(notFound), notFound
+
+
 if __name__ == '__main__':
     config = config.Config()
     snapshots = Snapshots(config)

qt/app.py

@@ -1182,11 +1182,26 @@ def updateTimeLine(self, refreshSnapshotsList = True):
                 item = self.timeLine.addSnapshot(sid)
             self.timeLine.checkSelection()
 
+    def validateOnTakeSnapshot(self):
+        hasMissing, missing = snapshots.hasMissing(self.config.include())
+        if hasMissing:
+            msgMissing = '\n'.join(missing)
+            msg = f'{_("The following folders are missing")}:\n\n{msgMissing}\n\n{_("Do you want to proceed?")}'
+            answer = messagebox.warningYesNo(self, msg)
+            return answer == QMessageBox.StandardButton.Yes
+        return True
+
     def btnTakeSnapshotClicked(self):
+        proceed = self.validateOnTakeSnapshot()
+        if not proceed:
+            return
         backintime.takeSnapshotAsync(self.config)
         self.updateTakeSnapshot(True)
 
     def btnTakeSnapshotChecksumClicked(self):
+        proceed = self.validateOnTakeSnapshot()
+        if not proceed:
+            return
         backintime.takeSnapshotAsync(self.config, checksum = True)
         self.updateTakeSnapshot(True)