remove some deprecated code from examples

Author: danieleades

examples/glob/main.rs

@@ -7,14 +7,12 @@ fn main() {
     // Option 1
     // --------
     // Gather all conf files from conf/ manually
-    let mut settings = Config::default();
-    settings
+    let settings = Config::builder()
         // File::with_name(..) is shorthand for File::from(Path::new(..))
-        .merge(File::with_name("examples/glob/conf/00-default.toml"))
-        .unwrap()
-        .merge(File::from(Path::new("examples/glob/conf/05-some.yml")))
-        .unwrap()
-        .merge(File::from(Path::new("examples/glob/conf/99-extra.json")))
+        .add_source(File::with_name("examples/glob/conf/00-default.toml"))
+        .add_source(File::from(Path::new("examples/glob/conf/05-some.yml")))
+        .add_source(File::from(Path::new("examples/glob/conf/99-extra.json")))
+        .build()
         .unwrap();
 
     // Print out our settings (as a HashMap)
@@ -28,13 +26,13 @@ fn main() {
     // Option 2
     // --------
     // Gather all conf files from conf/ manually, but put in 1 merge call.
-    let mut settings = Config::default();
-    settings
-        .merge(vec![
+    let settings = Config::builder()
+        .add_source(vec![
             File::with_name("examples/glob/conf/00-default.toml"),
             File::from(Path::new("examples/glob/conf/05-some.yml")),
             File::from(Path::new("examples/glob/conf/99-extra.json")),
         ])
+        .build()
         .unwrap();
 
     // Print out our settings (as a HashMap)
@@ -48,14 +46,14 @@ fn main() {
     // Option 3
     // --------
     // Gather all conf files from conf/ using glob and put in 1 merge call.
-    let mut settings = Config::default();
-    settings
-        .merge(
+    let settings = Config::builder()
+        .add_source(
             glob("examples/glob/conf/*")
                 .unwrap()
                 .map(|path| File::from(path.unwrap()))
                 .collect::<Vec<_>>(),
         )
+        .build()
         .unwrap();
 
     // Print out our settings (as a HashMap)

examples/hierarchical-env/settings.rs

@@ -2,11 +2,13 @@ use config::{Config, ConfigError, Environment, File};
 use std::env;
 
 #[derive(Debug, Deserialize)]
+#[allow(unused)]
 struct Database {
     url: String,
 }
 
 #[derive(Debug, Deserialize)]
+#[allow(unused)]
 struct Sparkpost {
     key: String,
     token: String,
@@ -15,19 +17,22 @@ struct Sparkpost {
 }
 
 #[derive(Debug, Deserialize)]
+#[allow(unused)]
 struct Twitter {
     consumer_token: String,
     consumer_secret: String,
 }
 
 #[derive(Debug, Deserialize)]
+#[allow(unused)]
 struct Braintree {
     merchant_id: String,
     public_key: String,
     private_key: String,
 }
 
 #[derive(Debug, Deserialize)]
+#[allow(unused)]
 pub struct Settings {
     debug: bool,
     database: Database,
@@ -38,29 +43,27 @@ pub struct Settings {
 
 impl Settings {
     pub fn new() -> Result<Self, ConfigError> {
-        let mut s = Config::default();
+        let run_mode = env::var("RUN_MODE").unwrap_or_else(|_| "development".into());
 
-        // Start off by merging in the "default" configuration file
-        s.merge(File::with_name("examples/hierarchical-env/config/default"))?;
-
-        // Add in the current environment file
-        // Default to 'development' env
-        // Note that this file is _optional_
-        let env = env::var("RUN_MODE").unwrap_or_else(|_| "development".into());
-        s.merge(
-            File::with_name(&format!("examples/hierarchical-env/config/{}", env)).required(false),
-        )?;
-
-        // Add in a local configuration file
-        // This file shouldn't be checked in to git
-        s.merge(File::with_name("examples/hierarchical-env/config/local").required(false))?;
-
-        // Add in settings from the environment (with a prefix of APP)
-        // Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
-        s.merge(Environment::with_prefix("app"))?;
-
-        // You may also programmatically change settings
-        s.set("database.url", "postgres://")?;
+        let s = Config::builder()
+            // Start off by merging in the "default" configuration file
+            .add_source(File::with_name("examples/hierarchical-env/config/default"))
+            // Add in the current environment file
+            // Default to 'development' env
+            // Note that this file is _optional_
+            .add_source(
+                File::with_name(&format!("examples/hierarchical-env/config/{}", run_mode))
+                    .required(false),
+            )
+            // Add in a local configuration file
+            // This file shouldn't be checked in to git
+            .add_source(File::with_name("examples/hierarchical-env/config/local").required(false))
+            // Add in settings from the environment (with a prefix of APP)
+            // Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
+            .add_source(Environment::with_prefix("app"))
+            // You may also programmatically change settings
+            .set_override("database.url", "postgres://")?
+            .build()?;
 
         // Now that we're done, let's access our configuration
         println!("debug: {:?}", s.get_bool("debug"));

examples/simple/main.rs

@@ -1,14 +1,14 @@
+use config::Config;
 use std::collections::HashMap;
 
 fn main() {
-    let mut settings = config::Config::default();
-    settings
+    let settings = Config::builder()
         // Add in `./Settings.toml`
-        .merge(config::File::with_name("examples/simple/Settings"))
-        .unwrap()
+        .add_source(config::File::with_name("examples/simple/Settings"))
         // Add in settings from the environment (with a prefix of APP)
         // Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
-        .merge(config::Environment::with_prefix("APP"))
+        .add_source(config::Environment::with_prefix("APP"))
+        .build()
         .unwrap();
 
     // Print out our settings (as a HashMap)

src/env.rs

@@ -6,7 +6,6 @@ use crate::source::Source;
 use crate::value::{Value, ValueKind};
 
 #[derive(Clone, Debug, Default)]
-#[must_use]
 pub struct Environment {
     /// Optional prefix that will limit access to the environment to only keys that
     /// begin with the defined prefix.

src/file/mod.rs

@@ -20,7 +20,6 @@ pub use self::source::string::FileSourceString;
 ///
 /// It supports optional automatic file format discovery.
 #[derive(Clone, Debug)]
-#[must_use]
 pub struct File<T, F> {
     source: T,