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fix: a leftover /prefs folder (Meshtastic) no longer blocks every settings save

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Our /prefs file can't be read from a folder of that name, and the rename
that commits each save can't replace one, so on a device moved over from
Meshtastic without erasing the flash no setting survived a restart.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-10-06 20:52:20 +02:00
co-authored by Claude Opus 5.5
parent 608c5b7dad
commit 7c568d6153
1 changed files with 40 additions and 0 deletions
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examples/companion_radio/DataStore.cpp
+40
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@@ -382,8 +382,48 @@ static void importOldPrefs(File& f, NodePrefs& p, double& lat, double& lon) {
if (p.buzzer_quiet > 1) p.buzzer_quiet = 0;
}
// A device that ran Meshtastic before (the L1 ships with it) can still have
// its settings folder at /prefs: our file can't be read from a folder, and the
// rename that commits every save can't replace one, so no setting survived a
// restart. The folder is of no use here: it goes.
#if defined(ESP32)
static void removeTree(FILESYSTEM* fs, const char* path) {
File dir = fs->open(path, "r", false);
if (!dir) return;
File f = dir.openNextFile();
while (f) {
char sub[64];
snprintf(sub, sizeof(sub), "%s", f.path());
const bool is_dir = f.isDirectory();
f.close();
if (is_dir) removeTree(fs, sub); else fs->remove(sub);
f = dir.openNextFile();
}
dir.close();
fs->rmdir(path);
}
#endif
static void removeStrayDir(FILESYSTEM* fs, const char* path) {
#if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM) || defined(ESP32)
#if defined(ESP32)
File f = fs->open(path, "r", false);
#else
File f = fs->open(path, FILE_O_READ);
#endif
const bool is_dir = f && f.isDirectory();
if (f) f.close();
if (!is_dir) return;
#if defined(ESP32)
removeTree(fs, path);
#else
fs->rmdir_r(path);
#endif
#endif
}
// `prefs` comes in holding the defaults; what the file holds replaces them.
void DataStore::loadPrefs(NodePrefs& prefs, double& node_lat, double& node_lon) {
removeStrayDir(_fs, "/prefs");
File file = openRead(_fs, "/prefs");
if (file) {
PrefsHeader h;