feat(conf): add method write_module_conf & param conf home via env var

conf/src/lib.rs

@@ -24,8 +24,10 @@
 
 use anyhow::Context as _;
 use dubp::crypto::keys::ed25519::Ed25519KeyPair;
-use serde::de::DeserializeOwned;
-use std::path::PathBuf;
+use serde::{de::DeserializeOwned, Serialize};
+use std::path::{Path, PathBuf};
+
+const MODULES_CONF_PATH: &str = "modules-conf";
 
 #[derive(Clone, Debug)]
 pub struct DuniterCoreConf {
@@ -52,13 +54,13 @@ pub enum DuniterMode {
 
 pub fn load_module_conf<C: Default + DeserializeOwned>(
     module_name: &'static str,
-    modules_conf_path_opt: &Option<PathBuf>,
+    profile_path_opt: &Option<PathBuf>,
 ) -> anyhow::Result<C> {
-    if let Some(ref modules_conf_path) = modules_conf_path_opt {
+    if let Some(ref profile_path) = profile_path_opt {
         if let Ok(conf) = envy::prefixed(format!("DUNITER_{}_", module_name)).from_env::<C>() {
             Ok(conf)
         } else {
-            let conf_file_path = modules_conf_path.join(format!("{}.conf", module_name));
+            let conf_file_path = find_module_conf_file_path(module_name, profile_path);
             let mut file = std::fs::File::open(conf_file_path)?;
             let mut contents = String::new();
             use std::io::Read as _;
@@ -70,3 +72,35 @@ pub fn load_module_conf<C: Default + DeserializeOwned>(
         Ok(C::default())
     }
 }
+
+pub fn write_module_conf<C: Default + Serialize>(
+    module_conf: C,
+    module_name: &'static str,
+    profile_path: &Path,
+) -> anyhow::Result<()> {
+    let conf_file_path = find_module_conf_file_path(module_name, profile_path);
+
+    let contents = serde_json::to_string_pretty(&module_conf)?;
+
+    let mut file = std::fs::File::create(conf_file_path)?;
+    use std::io::Write as _;
+    file.write_all(contents.as_bytes())?;
+
+    Ok(())
+}
+
+fn find_module_conf_file_path(
+    module_name: &'static str,
+    profile_path: &std::path::Path,
+) -> PathBuf {
+    if let Some(conf_home) = std::env::var_os("DUNITER_CONF_HOME") {
+        let conf_home_path = PathBuf::from(conf_home);
+        conf_home_path
+            .join(MODULES_CONF_PATH)
+            .join(format!("{}.conf", module_name))
+    } else {
+        profile_path
+            .join(MODULES_CONF_PATH)
+            .join(format!("{}.conf", module_name))
+    }
+}

module/src/lib.rs

@@ -217,13 +217,8 @@ macro_rules! plug_duniter_modules {
                 software_version: &'static str,
             ) -> anyhow::Result<()> {
                 // Read conf of each module
-                let modules_conf_path_opt = if let Some(ref profile_path) = profile_path_opt {
-                    Some(profile_path.join("modules-conf"))
-                } else {
-                    None
-                };
                 $(
-                    let [<$M:snake _conf>] = duniter_conf::load_module_conf::<<$M as DuniterModule>::Conf>(<$M>::MODULE_NAME, &modules_conf_path_opt)?;
+                    let [<$M:snake _conf>] = duniter_conf::load_module_conf::<<$M as DuniterModule>::Conf>(<$M>::MODULE_NAME, &profile_path_opt)?;
                 )*
 
                 // Initialize each module