commit c48880d0ca15659f3d3eb1b4e988613586afe988
Author: lucalise <luca_lise@icloud.com>
Date:   Mon Feb 2 00:22:51 2026 -0800

    feat: initial commit, add fs revision storage and reporter

diff --git a/.gitignore b/.gitignore
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+name = "thiserror-impl"
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+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "cfg-if",
+]
+
+[[package]]
+name = "tracing"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
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+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
+[[package]]
+name = "wasi"
+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
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+version = "1.0.2+wasi-0.2.9"
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+checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+dependencies = [
+ "wit-bindgen",
+]
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.108"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64024a30ec1e37399cf85a7ffefebdb72205ca1c972291c51512360d90bd8566"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.108"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "008b239d9c740232e71bd39e8ef6429d27097518b6b30bdf9086833bd5b6d608"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.108"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5256bae2d58f54820e6490f9839c49780dff84c65aeab9e772f15d5f0e913a55"
+dependencies = [
+ "bumpalo",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.108"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f01b580c9ac74c8d8f0c0e4afb04eeef2acf145458e52c03845ee9cd23e3d12"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "winapi-util"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
+[[package]]
+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
+
+[[package]]
+name = "xattr"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32e45ad4206f6d2479085147f02bc2ef834ac85886624a23575ae137c8aa8156"
+dependencies = [
+ "libc",
+ "rustix",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..da0d087
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "minecraft-sync"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+clap = { version = "4.5.56", features = ["derive"] }
+dirs = "6.0.0"
+flate2 = "1.1.8"
+indicatif = "0.18.3"
+tar = "0.4.44"
+tempfile = "3.24.0"
+thiserror = "2.0.18"
+thiserror-ext = "0.3.0"
+tracing = "0.1.44"
+tracing-subscriber = { version = "0.3.22", features = ["env-filter"] }
+walkdir = "2.5.0"
+
+[profile.dev-fast]
+inherits = "dev"
+opt-level = 2
diff --git a/src/archive.rs b/src/archive.rs
new file mode 100644
index 0000000..70f0b67
--- /dev/null
+++ b/src/archive.rs
@@ -0,0 +1,107 @@
+use std::{
+    fs::{self, DirEntry},
+    io::BufWriter,
+    path::Path,
+};
+
+use flate2::{Compression, write::GzEncoder};
+use tar::Builder;
+use tempfile::NamedTempFile;
+use walkdir::WalkDir;
+
+use crate::{
+    Data,
+    error::{Error, Result},
+    reporter::Reporter,
+    storage::{IGNORE_FILES, Storage, base_path_prism},
+};
+
+pub struct ArchiveResult {
+    pub temp_file: NamedTempFile,
+}
+
+pub fn create_archive(app_state: Data, reporter: &Reporter) -> Result<ArchiveResult> {
+    let entries = get_sync_entries()?;
+
+    let temp_file = match app_state.storage {
+        Storage::FS(_) => {
+            let target = crate::storage::fs::base_path();
+            tempfile::Builder::new()
+                .prefix(".revision_")
+                .suffix(".tar.gz.tmp")
+                .tempfile_in(&target)?
+        }
+    };
+    let file = temp_file.reopen()?;
+    let buffered = BufWriter::with_capacity(64 * 1024, file);
+    let encoder = GzEncoder::new(buffered, Compression::default());
+    let mut archive = Builder::new(encoder);
+    let total_files: u64 = entries
+        .iter()
+        .map(|entry| {
+            let path = entry.path();
+            if path.is_dir() {
+                WalkDir::new(&path)
+                    .into_iter()
+                    .filter_map(|e| e.ok())
+                    .filter(|e| e.file_type().is_file())
+                    .count() as u64
+            } else {
+                1
+            }
+        })
+        .sum();
+
+    reporter.start_archive_progress(total_files);
+    reporter.set_message("creating revision");
+    for entry in entries {
+        let path = entry.path();
+        let base_name = entry.file_name();
+        if path.is_dir() {
+            for walk_entry in WalkDir::new(&path) {
+                let walk_entry = walk_entry.map_err(|e| Error::create_archive(e, &path))?;
+                let full_path = walk_entry.path();
+                let relative = Path::new(&base_name).join(full_path.strip_prefix(&path).unwrap());
+
+                if walk_entry.file_type().is_file() {
+                    reporter.set_subtle(relative.display().to_string());
+                    archive
+                        .append_path_with_name(full_path, &relative)
+                        .map_err(|e| Error::create_archive(e, &path))?;
+                    reporter.inc_archive_progress();
+                } else {
+                    archive
+                        .append_dir(&relative, full_path)
+                        .map_err(|e| Error::create_archive(e, &path))?;
+                }
+            }
+        } else {
+            archive
+                .append_path_with_name(&path, &base_name)
+                .map_err(|e| Error::create_archive(e, &path))?;
+            reporter.inc_archive_progress();
+        }
+    }
+
+    archive
+        .finish()
+        .map_err(|e| Error::create_archive(e, &temp_file.path().file_name().unwrap()))?;
+    reporter.finish_archive_progress("created revision");
+
+    Ok(ArchiveResult { temp_file })
+}
+
+fn get_sync_entries() -> Result<Vec<DirEntry>> {
+    let base = base_path_prism();
+    let entries = fs::read_dir(&base)?
+        .filter_map(|e| e.ok())
+        .filter(|entry| {
+            entry
+                .file_name()
+                .to_str()
+                .map(|name| !IGNORE_FILES.contains(&name))
+                .unwrap_or(false)
+        })
+        .collect();
+    Ok(entries)
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..cf6aab9
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,33 @@
+use std::path::PathBuf;
+
+use thiserror::Error;
+use thiserror_ext::{Box, Construct};
+
+#[derive(Error, Box, Debug, Construct)]
+#[thiserror_ext(newtype(name = Error))]
+pub enum ErrorKind {
+    #[error("io error: {0}")]
+    Io(#[from] std::io::Error),
+    #[error("error parsing revision lockfile")]
+    RevisionLock,
+    #[error("error reading revision lockfile at {path}")]
+    ReadRevision {
+        path: PathBuf,
+        #[source]
+        source: std::io::Error,
+    },
+    #[error("error creating archive at {path}")]
+    CreateArchive {
+        path: PathBuf,
+        #[source]
+        source: std::io::Error,
+    },
+    #[error("error persisting archive to {path}")]
+    PersistError {
+        path: PathBuf,
+        #[source]
+        source: tempfile::PersistError,
+    },
+}
+
+pub type Result<T> = core::result::Result<T, Error>;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..70c114a
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,95 @@
+mod archive;
+mod error;
+mod reporter;
+mod storage;
+
+use std::{ops::Deref, sync::Arc, time::Duration};
+
+use clap::{CommandFactory, Parser, Subcommand};
+use indicatif::MultiProgress;
+use thiserror_ext::AsReport;
+use tracing::level_filters::LevelFilter;
+use tracing_subscriber::{
+    EnvFilter, fmt::format::FmtSpan, layer::SubscriberExt, util::SubscriberInitExt,
+};
+
+use crate::{
+    reporter::Reporter,
+    storage::{Storage, StorageImpl, get_storage_from_env},
+};
+
+#[derive(Parser, Debug)]
+#[command(version, about = "minecraft-sync", long_about = None)]
+struct Cli {
+    #[command(subcommand)]
+    command: Option<Commands>,
+}
+
+#[derive(Subcommand, Debug)]
+enum Commands {
+    /// push current state to storage
+    Push,
+}
+
+struct AppState {
+    multi: MultiProgress,
+    storage: Storage,
+}
+
+impl AppState {
+    pub fn new() -> Self {
+        Self {
+            multi: MultiProgress::new(),
+            storage: get_storage_from_env(),
+        }
+    }
+}
+
+#[derive(Clone)]
+struct Data(Arc<AppState>);
+
+impl Deref for Data {
+    type Target = AppState;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl Data {
+    pub fn new(inner: AppState) -> Self {
+        Self(Arc::new(inner))
+    }
+}
+
+fn run() -> crate::error::Result<()> {
+    let cli = Cli::parse();
+    let app_state = Data::new(AppState::new());
+
+    match cli.command {
+        Some(Commands::Push) => {
+            app_state.storage.store_revision(app_state.clone())?;
+        }
+        _ => Cli::command().print_long_help()?,
+    }
+
+    Ok(())
+}
+
+fn main() -> std::io::Result<()> {
+    let tracing_env_filter = EnvFilter::builder()
+        .with_default_directive(LevelFilter::INFO.into())
+        .from_env_lossy();
+    tracing_subscriber::registry()
+        .with(tracing_env_filter)
+        .with(
+            tracing_subscriber::fmt::layer()
+                .compact()
+                .with_span_events(FmtSpan::CLOSE),
+        )
+        .init();
+    if let Err(e) = run() {
+        eprintln!("Error: {}", e.as_report());
+    }
+
+    Ok(())
+}
diff --git a/src/reporter.rs b/src/reporter.rs
new file mode 100644
index 0000000..dd61351
--- /dev/null
+++ b/src/reporter.rs
@@ -0,0 +1,57 @@
+use std::{borrow::Cow, time::Duration};
+
+use indicatif::{ProgressBar, ProgressDrawTarget, ProgressStyle};
+
+use crate::Data;
+
+pub struct Reporter {
+    spinner: ProgressBar,
+}
+
+pub const TICK_CHARS: &str = "⣷⣯⣟⡿⢿⣻⣽⣾";
+
+impl Reporter {
+    pub fn new(app_state: Data) -> Self {
+        let spinner = app_state.multi.add(ProgressBar::new_spinner());
+        spinner.set_style(
+            ProgressStyle::with_template("{msg:>8.214/yellow} {spinner} [{elapsed_precise}]")
+                .unwrap()
+                .tick_chars(TICK_CHARS),
+        );
+        spinner.enable_steady_tick(std::time::Duration::from_millis(100));
+        spinner.set_draw_target(ProgressDrawTarget::stderr_with_hz(20));
+        Self { spinner }
+    }
+
+    pub fn start_archive_progress(&self, total: u64) {
+        self.spinner.set_length(total);
+        self.spinner.set_position(0);
+        self.spinner.set_style(
+            ProgressStyle::with_template(
+                "{msg:>12.214/yellow} {spinner} [{elapsed_precise}] [{bar:30.yellow/blue}] {pos}/{len}\n   └─ {prefix:.dim}",
+            )
+            .unwrap()
+            .tick_chars(TICK_CHARS)
+            .progress_chars("█▉▊▋▌▍▎▏ "),
+        );
+    }
+
+    pub fn inc_archive_progress(&self) {
+        self.spinner.inc(1);
+    }
+
+    pub fn set_message(&self, msg: impl Into<std::borrow::Cow<'static, str>>) {
+        self.spinner.set_message(msg);
+    }
+
+    pub fn set_subtle(&self, msg: impl Into<Cow<'static, str>>) {
+        self.spinner.set_prefix(msg);
+    }
+
+    pub fn finish_archive_progress(&self, msg: impl Into<std::borrow::Cow<'static, str>>) {
+        self.spinner.set_style(
+            ProgressStyle::with_template("{msg:>12.green} ✓ [{elapsed_precise}]").unwrap(),
+        );
+        self.spinner.finish_with_message(msg);
+    }
+}
diff --git a/src/storage/fs.rs b/src/storage/fs.rs
new file mode 100644
index 0000000..b5f0d3a
--- /dev/null
+++ b/src/storage/fs.rs
@@ -0,0 +1,63 @@
+use std::fs::DirEntry;
+use std::io::BufWriter;
+use std::path::{self, Path};
+use std::{fs, path::PathBuf};
+
+use flate2::{Compression, write::GzEncoder};
+use tar::Builder;
+use walkdir::WalkDir;
+
+use crate::Data;
+use crate::archive::create_archive;
+use crate::error::{Error, Result};
+use crate::reporter::Reporter;
+use crate::storage::{IGNORE_FILES, StorageImpl, base_path_prism};
+
+pub struct FSStorage;
+
+const LOCKFILE_NAME: &str = "revision.lock";
+
+impl StorageImpl for FSStorage {
+    fn get_revision(&self) -> Result<usize> {
+        let path = base_path().join(LOCKFILE_NAME);
+        let revision = match fs::read_to_string(&path) {
+            Ok(rev) => rev.parse::<usize>().map_err(|_| Error::revision_lock())?,
+            Err(_) => {
+                tracing::debug!("creating directory {:?}", path.parent().unwrap());
+                std::fs::create_dir_all(path.parent().unwrap())?;
+                fs::write(&path, "0").map_err(|e| Error::read_revision(e, &path))?;
+                0
+            }
+        };
+
+        Ok(revision)
+    }
+
+    fn store_revision(&self, app_state: Data) -> Result<()> {
+        let revision = self.get_revision()?;
+        let new_revision = revision + 1;
+        let reporter = Reporter::new(app_state.clone());
+        let result = create_archive(app_state, &reporter)?;
+        let archive_path = base_path().join(&format!("revision_{new_revision}.tar.gz"));
+
+        result
+            .temp_file
+            .persist(&archive_path)
+            .map_err(|e| Error::persist_error(e, &archive_path))?;
+        let lockfile_path = base_path().join(LOCKFILE_NAME);
+        fs::write(&lockfile_path, new_revision.to_string())?;
+
+        tracing::info!(
+            revision = new_revision,
+            path = ?archive_path,
+            "stored revision"
+        );
+        Ok(())
+    }
+}
+
+pub fn base_path() -> PathBuf {
+    dirs::data_local_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("minecraft-sync")
+}
diff --git a/src/storage/mod.rs b/src/storage/mod.rs
new file mode 100644
index 0000000..3346af6
--- /dev/null
+++ b/src/storage/mod.rs
@@ -0,0 +1,40 @@
+pub mod fs;
+
+use std::path::PathBuf;
+
+use crate::{Data, error::Result};
+
+pub trait StorageImpl {
+    fn get_revision(&self) -> Result<usize>;
+    fn store_revision(&self, app_state: Data) -> Result<()>;
+}
+
+pub enum Storage {
+    FS(fs::FSStorage),
+}
+
+pub const IGNORE_FILES: [&str; 6] = ["assets", "cache", "catpacks", "logs", "meta", "metacache"];
+
+impl StorageImpl for Storage {
+    fn get_revision(&self) -> Result<usize> {
+        match self {
+            Self::FS(storage) => storage.get_revision(),
+        }
+    }
+
+    fn store_revision(&self, app_state: Data) -> Result<()> {
+        match self {
+            Self::FS(storage) => storage.store_revision(app_state),
+        }
+    }
+}
+
+pub fn get_storage_from_env() -> Storage {
+    Storage::FS(fs::FSStorage)
+}
+
+pub fn base_path_prism() -> PathBuf {
+    dirs::data_local_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("PrismLauncher")
+}