initial os release. I really expect SO much bugs, guys. good luck =)

sabry_intrnl/src/config/manifest.rs

@@ -0,0 +1,44 @@
+use std::{env, fs, io};
+
+use serde::Deserialize;
+
+use super::SabryConfig;
+
+pub const MANIFEST: &str = "Cargo.toml";
+pub const MANIFEST_DIR_ENV: &str = "CARGO_MANIFEST_DIR";
+
+pub fn read_manifest() -> Result<ValuableManifest, ManifestError> {
+    let manpath = format!("{}/{MANIFEST}", env::var(MANIFEST_DIR_ENV)?);
+
+    Ok(toml::de::from_str(&fs::read_to_string(manpath)?)?)
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum ManifestError {
+    #[error("Could not read manifest path from env")]
+    ManifestDirEnv(#[from] env::VarError),
+    #[error("Could not read manifest file")]
+    ManifestRead(#[from] io::Error),
+    #[error("Could not deserialize manifest")]
+    ManifestDe(#[from] toml::de::Error),
+}
+
+/// Manifest structure that makes sense for sabry
+#[derive(Deserialize, Default)]
+pub struct ValuableManifest {
+    pub package: Option<ValuableManifestPkg>,
+}
+
+/// Manifest \[package.metadata\] structure that makes sense for sabry
+#[derive(Deserialize, Default)]
+pub struct ValuableManifestPkg {
+    pub metadata: Option<ValuableManifestPkgMeta>,
+}
+
+/// Manifest \[package.metadata.sabry\] structure that makes sense for sabry
+///
+/// Which is basically [SabryConfig]
+#[derive(Deserialize, Default)]
+pub struct ValuableManifestPkgMeta {
+    pub sabry: Option<SabryConfig>,
+}