Add profile::env module

Signed-off-by: Alexis Sellier <alexis@radicle.xyz>

radicle-node/src/main.rs

@@ -2,6 +2,7 @@ use std::{env, net, process, thread};
 
 use anyhow::Context as _;
 
+use radicle::profile;
 use radicle_node::crypto::ssh::keystore::MemorySigner;
 use radicle_node::logger;
 use radicle_node::prelude::Address;
@@ -18,6 +19,7 @@ struct Options {
 impl Options {
     fn from_env() -> Result<Self, lexopt::Error> {
         use lexopt::prelude::*;
+
         let mut parser = lexopt::Parser::from_env();
         let mut connect = Vec::new();
         let mut listen = Vec::new();
@@ -53,7 +55,7 @@ fn main() -> anyhow::Result<()> {
     let signer = match profile.signer() {
         Ok(signer) => signer.boxed(),
         Err(err) => {
-            let passphrase = env::var("RAD_PASSPHRASE")
+            let passphrase = env::var(profile::env::RAD_PASSPHRASE)
                 .context("Either ssh-agent must be initialized, or `RAD_PASSPHRASE` must be set")
                 .context(err)?;
             MemorySigner::load(&profile.keystore, &passphrase)?.boxed()

radicle/src/profile.rs

@@ -10,8 +10,8 @@
 //!     node/
 //!       radicle.sock                           # Node control socket
 //!
+use std::io;
 use std::path::PathBuf;
-use std::{env, io};
 
 use thiserror::Error;
 
@@ -22,6 +22,18 @@ use crate::node;
 use crate::storage::git::transport;
 use crate::storage::git::Storage;
 
+/// Environment variables used by radicle.
+pub mod env {
+    pub use std::env::*;
+
+    /// Path to the radicle home folder.
+    pub const RAD_HOME: &str = "RAD_HOME";
+    /// Path to the radicle node socket file.
+    pub const RAD_SOCKET: &str = "RAD_SOCKET";
+    /// Passphrase for the encrypted radicle secret key.
+    pub const RAD_PASSPHRASE: &str = "RAD_PASSPHRASE";
+}
+
 #[derive(Debug, Error)]
 pub enum Error {
     #[error(transparent)]
@@ -107,7 +119,7 @@ impl Profile {
 
     /// Get the path to the radicle node socket.
     pub fn node(&self) -> PathBuf {
-        env::var_os("RAD_SOCKET")
+        env::var_os(env::RAD_SOCKET)
             .map(PathBuf::from)
             .unwrap_or_else(|| self.home.join("node").join(node::DEFAULT_SOCKET_NAME))
     }
@@ -115,7 +127,7 @@ impl Profile {
 
 /// Get the path to the radicle home folder.
 pub fn home() -> Result<PathBuf, io::Error> {
-    if let Some(home) = env::var_os("RAD_HOME") {
+    if let Some(home) = env::var_os(env::RAD_HOME) {
         Ok(PathBuf::from(home))
     } else if let Some(home) = env::var_os("HOME") {
         Ok(PathBuf::from(home).join(".radicle"))