L

.cargo/config.toml

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+[registries.crates-io]
+protocol = "sparse"

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "upback"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.71"
+clap = { version = "4.3.3", features = ["derive"] }
+dirs = "5.0.1"
+serde = { version = "1.0.164", features = ["derive"] }
+serde_yaml = "0.9.21"
+tokio = { version = "1.28.2", features = ["full"] }
+twelf = { version = "0.11.0", features = ["json", "yaml", "toml", "dhall"] }

config.yml

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+directories:
+  /Users/michaelzhang/tmp/upback:

rustfmt.toml

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+max_width = 80
+tab_spaces = 2
+wrap_comments = true
+fn_single_line = true

src/config.rs

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+use std::{collections::HashMap, path::PathBuf};
+
+use twelf::config;
+
+#[derive(Debug, Serialize)]
+#[config]
+pub struct Config {
+  #[serde(default)]
+  directories: HashMap<PathBuf, PathBackupConfig>,
+}
+
+#[derive(Debug, Serialize)]
+#[config]
+pub struct PathBackupConfig {
+  #[serde(default)]
+  update_check_strategy: Option<UpdateCheckStrategy>,
+
+  #[serde(default)]
+  subpaths: HashMap<PathBuf, PathBackupConfig>,
+}
+
+#[derive(Debug, Serialize)]
+#[config]
+pub struct DestinationConfig {
+  backend: DestinationBackend,
+}
+
+#[derive(Default, Debug, Serialize, Deserialize)]
+pub enum UpdateCheckStrategy {
+  /// Just check atime + file size
+  #[default]
+  AtimeFileSize,
+
+  /// Calculate a 128-bit checksum (slow)
+  Checksum,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum DestinationBackend {}

src/main.rs

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+pub mod config;
+pub mod patterns;
+
+#[macro_use]
+extern crate serde;
+
+use std::{fs::File, io::Read};
+
+use anyhow::Result;
+
+use crate::config::Config;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+  println!("Hello, world!");
+
+  let config: Config = {
+    let file = File::open("config.yml")?;
+    serde_yaml::from_reader(file)?
+  };
+
+  println!("config: {config:?}");
+
+  Ok(())
+}

src/patterns.rs

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+use std::path::PathBuf;
+
+pub struct Pattern {
+  pub found_at: PathBuf,
+  pub kind: PatternKind,
+}
+
+pub enum PatternKind {
+  /// Just a plain ol' file. Read + write
+  Regular,
+
+  /// Archives can probably be diffed granularly? Maybe above a certain file size
+  Archive,
+}