expand tilde in config file (#102)

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Config option `signature-delimiter` to customize the signature delimiter (default to `-- \n`) [[#114](https://github.com/soywod/himalaya/pull/114)]
+- Expand tilde and env vars for `downloads-dir` and `signature` [#102]
 
 ### Fixed
 
@@ -285,6 +286,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#95]: https://github.com/soywod/himalaya/issues/95
 [#96]: https://github.com/soywod/himalaya/issues/96
 [#100]: https://github.com/soywod/himalaya/issues/100
+[#102]: https://github.com/soywod/himalaya/issues/102
 [#109]: https://github.com/soywod/himalaya/issues/109
 [#117]: https://github.com/soywod/himalaya/issues/117
 [#121]: https://github.com/soywod/himalaya/issues/121

Cargo.lock

@@ -195,6 +195,27 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea221b5284a47e40033bf9b66f35f984ec0ea2931eb03505246cd27a963f981b"
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if 1.0.0",
+ "dirs-sys-next",
+]
+
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.26"
@@ -328,6 +349,7 @@ dependencies = [
  "rfc2047-decoder",
  "serde",
  "serde_json",
+ "shellexpand",
  "terminal_size",
  "toml",
  "tree_magic",
@@ -809,6 +831,16 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
+dependencies = [
+ "getrandom",
+ "redox_syscall 0.2.8",
+]
+
 [[package]]
 name = "regex"
 version = "1.5.4"
@@ -937,6 +969,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "shellexpand"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83bdb7831b2d85ddf4a7b148aa19d0587eddbe8671a436b7bd1182eaad0f2829"
+dependencies = [
+ "dirs-next",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.6.1"

Cargo.toml

@@ -19,6 +19,7 @@ native-tls = "0.2"
 rfc2047-decoder = "0.1.2"
 serde = {version = "1.0.118", features = ["derive"]}
 serde_json = "1.0.61"
+shellexpand = "2.1.0"
 terminal_size = "0.1.15"
 toml = "0.5.8"
 tree_magic = "0.2.3"

src/config/model.rs

@@ -2,6 +2,7 @@ use error_chain::error_chain;
 use lettre::transport::smtp::authentication::Credentials as SmtpCredentials;
 use log::debug;
 use serde::Deserialize;
+use shellexpand;
 use std::{
     collections::HashMap,
     env,
@@ -230,8 +231,17 @@ impl Config {
         account
             .downloads_dir
             .as_ref()
-            .unwrap_or(self.downloads_dir.as_ref().unwrap_or(&env::temp_dir()))
-            .to_owned()
+            .and_then(|dir| dir.to_str())
+            .and_then(|dir| shellexpand::full(dir).ok())
+            .map(|dir| PathBuf::from(dir.to_string()))
+            .unwrap_or(
+                self.downloads_dir
+                    .as_ref()
+                    .and_then(|dir| dir.to_str())
+                    .and_then(|dir| shellexpand::full(dir).ok())
+                    .map(|dir| PathBuf::from(dir.to_string()))
+                    .unwrap_or(env::temp_dir()),
+            )
             .join(filename)
     }
 
@@ -264,8 +274,9 @@ impl Config {
             .signature
             .as_ref()
             .or_else(|| self.signature.as_ref());
-
-        sig.and_then(|sig| fs::read_to_string(sig).ok())
+        sig.and_then(|sig| shellexpand::full(sig).ok())
+            .map(|sig| sig.to_string())
+            .and_then(|sig| fs::read_to_string(sig).ok())
             .or_else(|| sig.map(|sig| sig.to_owned()))
             .map(|sig| String::new() + sig_delim + sig.as_ref())
     }