Migrate to config v0.12.0

Bumps [config](https://github.com/mehcode/config-rs) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/mehcode/config-rs/releases)
- [Changelog](https://github.com/mehcode/config-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mehcode/config-rs/compare/0.11.0...0.12.0)

---
updated-dependencies:
- dependency-name: config
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.cargo/audit.toml

@@ -0,0 +1,3 @@
+[advisories]
+# TODO: check if chrono fixed this
+ignore = [ "RUSTSEC-2020-0159", "RUSTSEC-2020-0071" ]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hoc"
-version = "0.21.1"
+version = "0.21.2"
 authors = ["Valentin Brandl <vbrandl@riseup.net>"]
 edition = "2018"
 build = "build.rs"
@@ -14,33 +14,33 @@ name = "hoc"
 
 [dependencies]
 actix-rt = "2.6.0"
-actix-web = "4.0.0-rc.1"
+actix-web = "4.0.0-rc.3"
 badge = "0.3.0"
 bytes = "1.1.0"
-config = { version = "0.11.0", features = ["toml"] }
+config = { version = "0.12.0", features = ["toml"] }
 dotenv = "0.15.0"
-futures = "0.3.19"
-git2 = "0.13.25"
+futures = "0.3.21"
+git2 = "0.14.0"
 lazy_static = "1.4.0"
 number_prefix = "0.4.0"
 openssl-probe = "0.1.5"
 reqwest = "0.11.9"
 serde = "1.0.136"
 serde_derive = "1.0.136"
-serde_json = "1.0.78"
-tracing = "0.1.29"
-tracing-actix-web = "0.5.0-rc.1"
+serde_json = "1.0.79"
+tracing = "0.1.31"
+tracing-actix-web = "0.5.0-rc.3"
 tracing-bunyan-formatter = "0.3.2"
 tracing-futures = "0.2.5"
 tracing-log = "0.1.2"
-tracing-subscriber = { version = "0.3.7", features = ["registry", "env-filter"] }
+tracing-subscriber = { version = "0.3.9", features = ["registry", "env-filter"] }
 
 [build-dependencies]
-ructe = "0.13.4"
+ructe = "0.14.0"
 vergen = { version = "6.0.2", default-features = false, features = ["git"] }
 
 [dev-dependencies]
-awc = "3.0.0-beta.20"
-ructe = "0.13.4"
+awc = "3.0.0-beta.21"
+ructe = "0.14.0"
 tempfile = "3.3.0"
-tokio = "1.16.1"
+tokio = "1.17.0"

build.rs

@@ -1,15 +1,12 @@
 extern crate ructe;
 extern crate vergen;
 
-use ructe::Ructe;
+use ructe::{Ructe, RucteError};
 use vergen::{vergen, Config, ShaKind};
 
-fn main() {
+fn main() -> Result<(), RucteError> {
     let mut config = Config::default();
     *config.git_mut().sha_kind_mut() = ShaKind::Short;
     vergen(config).expect("Unable to generate static repo info");
-    Ructe::from_env()
-        .expect("ructe")
-        .compile_templates("templates")
-        .unwrap();
+    Ructe::from_env()?.compile_templates("templates")
 }

src/config.rs

@@ -18,21 +18,16 @@ pub struct Settings {
 }
 
 impl Settings {
-    #[deprecated]
-    pub fn new() -> Result<Self, ConfigError> {
-        Self::load()
-    }
-
     pub fn load() -> Result<Self, ConfigError> {
-        let mut config = Config::new();
-        config
-            .merge(File::with_name("hoc.toml").required(false))?
-            .merge(Environment::with_prefix("hoc"))?
+        Config::builder()
+            .add_source(File::with_name("hoc.toml").required(false))
+            .add_source(Environment::with_prefix("hoc"))
             .set_default("repodir", "./repos")?
             .set_default("cachedir", "./cache")?
             .set_default("workers", 4)?
             .set_default("port", 8080)?
-            .set_default("host", "0.0.0.0")?;
-        config.try_into()
+            .set_default("host", "0.0.0.0")?
+            .build()?
+            .try_deserialize()
     }
 }