re-export libs, replace failure with anyhow

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "clappconfig"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Ondřej Hruška <ondra@ondrovo.com>"]
 edition = "2018"
 license = "MIT"
@@ -15,12 +15,8 @@ categories = [
 [dependencies]
 log = "0.4"
 env_logger = "0.7"
-failure = "0.1"
+anyhow = "1.0.28"
 serde = "1.0"
 serde_json = "1.0"
 clap = "2.33"
 json5 = "0.2"
-
-[dev-dependencies]
-smart-default = "0.6"
-serde_derive = "1.0"

src/lib.rs

@@ -1,7 +1,6 @@
 #[macro_use]
-extern crate log;
+pub extern crate log;
 
-use failure::{bail, Fallible};
 use serde::de::DeserializeOwned;
 use serde::Serialize;
 use std::collections::HashMap;
@@ -11,6 +10,9 @@ use std::io::Read;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 
+// re-export libs appearing in public API
+pub use clap;
+
 pub const LOG_LEVELS: [&str; 6] = ["off", "error", "warn", "info", "debug", "trace"];
 
 /// Implement this for the main config struct
@@ -56,10 +58,10 @@ pub trait AppConfig: Sized + Serialize + DeserializeOwned + Debug + Default {
 
     /// Configure the config object using args.
     /// Logging has already been inited and configured.
-    fn configure<'a>(self, _clap: &clap::ArgMatches<'a>) -> Fallible<Self::Init>;
+    fn configure<'a>(self, _clap: &clap::ArgMatches<'a>) -> anyhow::Result<Self::Init>;
 
     /// Initialize the app
-    fn init(name: &str, cfg_file_name: &str, version: Option<&str>) -> Fallible<Self::Init> {
+    fn init(name: &str, cfg_file_name: &str, version: Option<&str>) -> anyhow::Result<Self::Init> {
         let version = version.unwrap_or_else(|| env!("CARGO_PKG_VERSION"));
         let clap = clap::App::new(name)
             .arg(
@@ -160,7 +162,7 @@ pub trait AppConfig: Sized + Serialize + DeserializeOwned + Debug + Default {
         let mut level = config.logging();
 
         if !LOG_LEVELS.contains(&level) {
-            bail!("Invalid default log level: {}", level);
+            anyhow::bail!("Invalid default log level: {}", level);
         }
 
         /* env RUST_LOG overrides default if set, but can be changed by CLI args */
@@ -169,7 +171,7 @@ pub trait AppConfig: Sized + Serialize + DeserializeOwned + Debug + Default {
             level = env_level;
 
             if !LOG_LEVELS.contains(&level) {
-                bail!("Invalid env log level: {}", level);
+                anyhow::bail!("Invalid env log level: {}", level);
             }
         }
 
@@ -239,7 +241,7 @@ pub trait AppConfig: Sized + Serialize + DeserializeOwned + Debug + Default {
     }
 }
 
-fn read_file<P: AsRef<Path>>(path: P) -> Fallible<String> {
+fn read_file<P: AsRef<Path>>(path: P) -> anyhow::Result<String> {
     let path = path.as_ref();
     let mut file = File::open(path)?;