• fix: Loader#watchFile doesn't work on macOS
• build: update dependencies
• build: support Github Actions
• build: disable Aliyun Maven repository by default

Major Features and Improvements

• feature: migrate to tree-based source APIs
• feature: support merge operation for sources
• feature: support withFallback API for config spec
• fix: fix formatting bug in toml4j's writer when map is in nested list
• fix: filter invalid variables in environment
• refactor: unify info and context in Source API

Breaking Changes

After migrated to tree-based source APIs, many deprecated APIs are removed, including:

• Source: all isXXX and toXXX APIs
• Config: layer, addSource and withSourceFrom

feature: support JavaScript source using GraalVM JavaScript

fix: doesn't close input/output stream in provider/writer

Major Features and Improvements

Konf is modularized, now you can use different modules for different sources without unnecessary dependencies.

Breaking Changes

After modularized Konf, hocon/toml/xml/yaml/git/watchGit in DefaultLoaders become extension properties/functions and should be imported explicitly.
For example, you should import com.uchuhimo.konf.source.hocon before using config.from.hocon; in Java, config.from().hocon is unavailable, please use config.from().source(HoconProvider.INSTANCE) instead.

Major Features and Improvements

• feature: support optional sources
• feature: support empty list and single element list in flat source
• feature: add config.containsRequired() (return true/false) and config.validateRequired() (throw exception instead) to check whether all values of required items exist in config or not
• feature: leading or trailing whitespaces are allowed in item name / path
• feature: support onSet for Item
• fix: support HOCON substitutions
• fix: default values in facade config now have lower priority than the values in fallback config

Major Features and Improvements

• feature: add support for nested config spec
• feature: infer config spec prefix automatically
• fix: load keys from the system environment case-insensitively
• feature: remove experimental corountine APIs

Major Features and Improvements

• feature: add mapped API for DefaultLoaders
• feature: If FAIL_ON_UNKNOWN_PATH enabled, an exception is thrown when loading from the source to indicate it contains unknown paths

Major Features and Improvements

• feature: support user-defined extension in DefaultLoaders
• feature: support prefix operations for Source/Config/ConfigSpec
• feature: support ad-hoc config item
• feature: support to cast config to a specified class
• feature: support merge operations for Source/Config/ConfigSpec
• feature: support to load source from git
• feature: support nullable type in Config/Source/Writer
• gradle: update dependencies
  • Kotlin: 1.2.30 -> 1.2.51

Major Features and Improvements

• feature: support to automatically detect item name in ConfigSpec
• feature: support auto-detected URL format
• feature: support auto-detected watched URL format
• feature: support to parse comma separated values in the flat source
• feature: support export config as the comma-separated format for flat source writers
• gradle: update dependencies
  • Kotlin: 1.2.21 -> 1.2.30

Breaking Changes

APIs in ConfigSpec have been updated to support item name's auto-detection, please migrate to new APIs. Here are some examples:

• val host = optional("host", "0.0.0.0") to val host by optional("0.0.0.0")
• val port = required<Int>("port") to val port by required<Int>()
• val nextPort = lazy("nextPort") { config -> config[port] + 1 } to val nextPort by lazy { config -> config[port] + 1 }

Thanks to our Contributors

Thanks to our contributors whose commits are featured in this release:

@DALDEI