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fix: handle corrupted config files gracefully instead of crashing #119

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neilhuang007 wants to merge 1 commit into from
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fix: handle corrupted config files gracefully instead of crashing #119

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4 changes: 2 additions & 2 deletions common/src/main/java/me/thosea/badoptimizations/config/Config.java
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Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,7 @@ public static void init() {}
// config v5 adds caching hooks and changes debug hud comment
// config v6 only changes comments

if(!ctx.fromExistingFile() || ver < CURRENT_CONFIG_VER) {
if(!ctx.fromExistingFile() || ver < CURRENT_CONFIG_VER || ctx.hasMissingOptions) {
try {
writeConfig();
} catch(Exception e) {
Expand Down Expand Up @@ -126,6 +126,6 @@ public static void writeConfig() throws Exception {
CURRENT_CONFIG_VER
);

Files.writeString(FILE, data, StandardOpenOption.CREATE, StandardOpenOption.WRITE);
Files.writeString(FILE, data, StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING);
}
}
9 changes: 4 additions & 5 deletions common/src/main/java/me/thosea/badoptimizations/config/ConfigLoadContext.java
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ public final class ConfigLoadContext {
public final ModIncompatibilities incompats = new ModIncompatibilities();
public final int version;
@Nullable public final Properties properties;
public boolean hasMissingOptions = false;

public ConfigLoadContext() {
if(Files.exists(FILE)) {
Expand All @@ -32,10 +33,7 @@ private Properties loadProp() {
return prop;
}
} catch(Exception e) {
// TODO: does passing Exception as object still log the stack trace?
LOGGER.error("Failed to load config from " + FILE + ". " +
"If you need to, you can delete the file to generate a new one.", e);
System.exit(1);
LOGGER.error("Failed to load config from " + FILE + ". Config will be regenerated with default values.", e);
return null;
}
}
Expand Down Expand Up @@ -74,7 +72,8 @@ private String str(String name) {

String str = properties.getProperty(name);
if(str == null) {
throw new IllegalStateException("Config option " + name + " not found");
LOGGER.warn("Config option {} not found - using default value. Config will be regenerated.", name);
hasMissingOptions = true;
}
Comment on lines +75 to 77
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Copilot AI Dec 25, 2025

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The exceptions thrown in boolOrDefault (line 50) and intOrDefault (lines 62, 65) when config values are malformed are not handled. These exceptions will prevent the graceful recovery that this PR aims to provide. When a config value is malformed (e.g., "maybe" instead of "true"/"false", or "abc" instead of a number), the application will still crash instead of using the default value.

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return str;
}
Expand Down