commit 4343efa4623a56aa6d6c6902193f2bf3cc7861e1
Author: Patrick Lühne <patrick@luehne.de>
Date:   Fri Sep 28 16:19:14 2018 +0200

    Initial commit

diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..c1c5414
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,989 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..24fe564
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "benchmark_repository"
+version = "0.1.0"
+authors = ["Patrick Lühne <patrick@luehne.de>"]
+
+[dependencies]
+git2 = "^0.7"
+log = "0.4"
+pretty_env_logger = "0.2"
+indicatif = "0.9"
+yaml-rust = "0.4"
+notify = "4"
+tempfile = "3"
+
+[dependencies.cpython]
+git = "https://github.com/dgrunwald/rust-cpython/"
+branch = "master"
diff --git a/examples/test.rs b/examples/test.rs
new file mode 100644
index 0000000..5c0ac7d
--- /dev/null
+++ b/examples/test.rs
@@ -0,0 +1,66 @@
+extern crate benchmark_repository;
+extern crate pretty_env_logger;
+extern crate yaml_rust;
+
+use benchmark_repository::{BenchmarkRepository, TargetPath};
+
+use std::io::{self, copy, Read};
+use std::path::Path;
+use yaml_rust::{YamlLoader, YamlEmitter};
+
+use std::{thread, time};
+
+fn main()
+{
+	pretty_env_logger::init();
+
+	let mut benchmark_repository = BenchmarkRepository::new("git@git.luehne.de:patrick/tplp-planning-benchmark.git", Path::new("storage"), "git", "Potassco Bot", "bot@potassco.org");
+
+	/*let files = vec!
+		[
+			TargetPath{source: &Path::new("/tmp/test"), destination: &Path::new("foobar/test")},
+			TargetPath{source: &Path::new("/tmp/test2"), destination: &Path::new("foobar/test-2")},
+		];
+
+	benchmark_repository.commit_files(&files[..], "test-results");*/
+
+	let content = benchmark_repository.read_file(Path::new("configurations.yml"), "test-config").unwrap();
+	let configurations = &YamlLoader::load_from_str(&content).unwrap()[0]["configurations"];
+
+	let content = benchmark_repository.read_file(Path::new("instances.yml"), "test-config").unwrap();
+	let instances = &YamlLoader::load_from_str(&content).unwrap()[0];
+
+	for configuration in configurations.as_vec().unwrap()
+	{
+		for (instance_set_id, instance_set) in instances.as_hash().unwrap()
+		{
+			for instance in instance_set.as_vec().unwrap()
+			{
+				let configuration_id = configuration["id"].as_str().unwrap();
+				let instance_set_id = instance_set_id.as_str().unwrap();
+				let instance_ipc = instance["ipc"].as_str().unwrap();
+				let instance_domain = instance["domain"].as_str().unwrap();
+				let instance_number = instance["instance"].as_i64().unwrap();
+
+				let file_name_base = format!("{}/{}/{}/{}", configuration_id, instance_ipc, instance_domain, instance_number);
+				let file_name_output = format!("{}.out", file_name_base);
+
+				if (benchmark_repository.file_exists(Path::new(&file_name_output), "test-results"))
+				{
+					println!("done: [{}, {}, {}/{}/{}]", configuration_id, instance_set_id, instance_ipc, instance_domain, instance_number);
+					continue;
+				}
+
+				let test = benchmark_repository.create_autocommit_directory(Path::new(&file_name_base), "test-results").unwrap();
+				//println!("{}", test.display());
+
+				//println!("to do: [{}, {}, {}/{}/{}]", configuration_id, instance_set_id, instance_ipc, instance_domain, instance_number);
+			}
+		}
+	}
+
+	let duration = time::Duration::from_secs(20);
+	thread::sleep(duration);
+
+	benchmark_repository.wait_for_autocommit_thread();
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..072c4ad
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,474 @@
+extern crate git2;
+extern crate pretty_env_logger;
+#[macro_use]
+extern crate log;
+extern crate indicatif;
+extern crate notify;
+extern crate tempfile;
+
+use git2::{Cred, Error, FetchOptions, Index, IndexEntry, IndexTime, Progress, PushOptions, RemoteCallbacks, ResetType, Repository, Signature, TreeBuilder};
+use git2::build::{CheckoutBuilder, RepoBuilder};
+use std::fs::{File, create_dir_all, read};
+use std::io::Cursor;
+use std::path::{Path, PathBuf};
+use std::string::String;
+use std::str;
+use std::sync::mpsc::{channel, Sender, Receiver};
+use std::thread::{spawn, JoinHandle};
+use indicatif::{ProgressBar, ProgressStyle};
+use notify::{raw_watcher, RecommendedWatcher, RawEvent, Op};
+use tempfile::TempDir;
+
+pub struct BenchmarkRepository
+{
+	repository: Repository,
+	ssh_user: String,
+	user_name: String,
+	user_email: String,
+	autocommit_channel: (Sender<RawEvent>, Receiver<RawEvent>),
+	autocommit_directory: Option<TempDir>,
+	autocommit_thread: Option<JoinHandle<()>>,
+	autocommit_watcher: Option<RecommendedWatcher>,
+}
+
+pub struct TargetPath<'a>
+{
+	pub source: &'a Path,
+	pub destination: &'a Path,
+}
+
+impl BenchmarkRepository
+{
+	fn progress_bar_style() -> ProgressStyle
+	{
+		ProgressStyle::default_bar()
+			.template("{bar:74.on_black} {percent:>3} %")
+			.progress_chars("█▉▊▋▌▍▎▏  ")
+	}
+
+	fn transfer_progress_callback(progress: Progress, progress_bar: &mut ProgressBar) -> bool
+	{
+		progress_bar.set_length(progress.total_objects() as u64);
+		progress_bar.set_position(progress.received_objects() as u64);
+
+		// continue the transfer
+		true
+	}
+
+	fn push_update_reference_callback(reference: &str, status: Option<&str>) -> Result<(), Error>
+	{
+		match status
+		{
+			None => trace!("Reference “{}” pushed successfully to remote “origin”", reference),
+			Some(error) => panic!("Couldn’t push reference “{}” to remote “origin”: {}", reference, error),
+		};
+
+		Ok(())
+	}
+
+	fn checkout_progress_callback(path: Option<&Path>, current: usize, total: usize, progress_bar: &mut ProgressBar)
+	{
+		progress_bar.set_length(total as u64);
+		progress_bar.set_position(current as u64);
+	}
+
+	fn reset_origin(&self, remote_url: &str) -> &Self
+	{
+		let remote = match self.repository.find_remote("origin")
+		{
+			Ok(remote) => remote,
+			Err(_) =>
+				match self.repository.remote("origin", remote_url)
+				{
+					Ok(remote) => remote,
+					Err(error) => panic!("Could not reset remote “origin”: {}", error),
+				},
+		};
+
+		info!("Reset origin to “{}”", remote_url);
+
+		self
+	}
+
+	fn fetch_branch(&self, branch_name: &str) -> &Self
+	{
+		let mut progress_bar = ProgressBar::new(0);
+		progress_bar.set_style(BenchmarkRepository::progress_bar_style());
+
+		{
+			let mut remote_callbacks = RemoteCallbacks::new();
+			remote_callbacks.credentials(
+				|_, _, _|
+				{
+					match Cred::ssh_key_from_agent(&self.ssh_user)
+					{
+						Ok(credentials) => Ok(credentials),
+						Err(error) => panic!("could not retrieve key pair for SSH authentication as user “{}”: {}", self.ssh_user, error),
+					}
+				});
+
+			remote_callbacks.transfer_progress(
+				|progress| BenchmarkRepository::transfer_progress_callback(progress, &mut progress_bar));
+
+			let mut fetch_options = FetchOptions::new();
+			fetch_options.remote_callbacks(remote_callbacks);
+
+			let mut origin = self.repository.find_remote("origin").expect("could not find remote “origin”");
+
+			info!("Updating branch “{}”", branch_name);
+
+			if let Err(error) = origin.fetch(&[branch_name], Some(&mut fetch_options), None)
+			{
+				panic!("failed to fetch branch “{}” from remote “origin”: {}", branch_name, error);
+			}
+		}
+
+		progress_bar.finish_and_clear();
+
+		trace!("Branch “{}” is up-to-date", branch_name);
+
+		self
+	}
+
+	fn init(base_path: &Path) -> Repository
+	{
+		let repository = match Repository::init_bare(base_path)
+		{
+			Ok(repository) => repository,
+			Err(error) => panic!("failed to initialize Git repository in “{}”: {}", base_path.display(), error),
+		};
+
+		info!("Initialized Git repository in “{}”", base_path.display());
+
+		repository
+	}
+
+	pub fn new(remote_url: &str, base_path: &Path, ssh_user: &str, user_name: &str, user_email: &str) -> BenchmarkRepository
+	{
+		let repository = match Repository::open(base_path)
+		{
+			Ok(repository) =>
+			{
+				info!("Using existing Git repository");
+
+				repository
+			},
+			Err(_) => BenchmarkRepository::init(base_path),
+		};
+
+		let benchmark_repository =
+			BenchmarkRepository
+			{
+				repository: repository,
+				ssh_user: ssh_user.to_string(),
+				user_name: user_name.to_string(),
+				user_email: user_email.to_string(),
+				autocommit_channel: channel(),
+				autocommit_directory: None,
+				autocommit_thread: None,
+				autocommit_watcher: None,
+			};
+
+		benchmark_repository
+			.reset_origin(remote_url)
+			.fetch_branch("test-config")
+			.fetch_branch("test-results")
+			.fetch_branch("test-status");
+
+		benchmark_repository
+	}
+
+	pub fn read_file_as_index_entry(&self, file_path: &Path, result_file_path: &Path) -> IndexEntry
+	{
+		// create a new blob with the file contents
+		let object_id = match self.repository.blob_path(file_path)
+		{
+			Ok(object_id) => object_id,
+			Err(error) => panic!("Could not write blob for “{}”: {}", file_path.display(), error),
+		};
+
+		info!("Created object “{}” from “{}”", object_id, file_path.display());
+
+		IndexEntry
+		{
+			ctime: IndexTime::new(0, 0),
+			mtime: IndexTime::new(0, 0),
+			dev: 0,
+			ino: 0,
+			mode: 0o100644,
+			uid: 0,
+			gid: 0,
+			file_size: 0,
+			id: object_id,
+			flags: 0,
+			flags_extended: 0,
+			path: result_file_path.to_string_lossy().as_bytes().to_owned(),
+		}
+	}
+
+	pub fn commit_files(&self, file_paths: &[TargetPath], branch_name: &str)
+	{
+		let tip_reference_name = format!("refs/remotes/origin/{}", branch_name);
+		let tip_reference = match self.repository.find_reference(&tip_reference_name)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not find reference “{}”: {}", tip_reference_name, error),
+		};
+
+		let parent_tree = match tip_reference.peel_to_tree()
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not peel reference to tree: {}", error),
+		};
+
+		let mut index = match Index::new()
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not create index: {}", error),
+		};
+
+		match index.read_tree(&parent_tree)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not read parent tree into index: {}", error),
+		};
+
+		for target_path in file_paths
+		{
+			let index_entry = self.read_file_as_index_entry(target_path.source, target_path.destination);
+
+			if let Err(error) = index.add(&index_entry)
+			{
+				panic!("Could not add index entry for “{}”: {}", target_path.destination.display(), error);
+			}
+		}
+
+		let tree_object_id = match index.write_tree_to(&self.repository)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not write index to tree: {}", error),
+		};
+
+		let tree = match self.repository.find_tree(tree_object_id)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could obtain tree: {}", error),
+		};
+
+		info!("Created tree object “{}”", tree_object_id);
+
+		let signature = Signature::now(&self.user_name, &self.user_email).expect("Could not create signature");
+		let message = format!("Add files");
+
+		let parent = match tip_reference.peel_to_commit()
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not peel reference: {}", error),
+		};
+
+		let commit_id = match self.repository.commit(Some(&tip_reference_name), &signature, &signature, &message, &tree, &[&parent])
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not write commit: {}", error),
+		};
+
+		let push_refspec = format!("refs/remotes/origin/{}:refs/heads/{}", branch_name, branch_name);
+
+		trace!("Created commit “{}”, using refspec “{}”", commit_id, push_refspec);
+
+		let mut remote_callbacks = RemoteCallbacks::new();
+		remote_callbacks.credentials(
+			|_, _, _|
+			{
+				match Cred::ssh_key_from_agent(&self.ssh_user)
+				{
+					Ok(value) => Ok(value),
+					Err(error) => panic!("could not retrieve key pair for SSH authentication as user “{}”: {}", self.ssh_user, error),
+				}
+			});
+
+		remote_callbacks.push_update_reference(
+			|reference, status| BenchmarkRepository::push_update_reference_callback(reference, status));
+
+		let mut push_options = PushOptions::new();
+		push_options.remote_callbacks(remote_callbacks);
+
+		let mut remote = self.repository.find_remote("origin").expect("");
+		remote.push(&[&push_refspec], Some(&mut push_options)).expect("couldn’t push");
+	}
+
+	pub fn file_exists(&self, file_path: &Path, branch_name: &str) -> bool
+	{
+		let tip_reference_name = format!("refs/remotes/origin/{}", branch_name);
+		let tip_reference = match self.repository.find_reference(&tip_reference_name)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not find reference “{}”: {}", tip_reference_name, error),
+		};
+
+		let tree = match tip_reference.peel_to_tree()
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not peel reference to tree: {}", error),
+		};
+
+		let object_id = match tree.get_path(file_path)
+		{
+			Ok(tree_entry) => tree_entry.id(),
+			Err(error) => return false,
+		};
+
+		let blob = match self.repository.find_blob(object_id)
+		{
+			Ok(blob) => blob,
+			Err(error) => return false,
+		};
+
+		true
+	}
+
+	pub fn read_file(&self, file_path: &Path, branch_name: &str) -> Option<String>
+	{
+		let tip_reference_name = format!("refs/remotes/origin/{}", branch_name);
+		let tip_reference = match self.repository.find_reference(&tip_reference_name)
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not find reference “{}”: {}", tip_reference_name, error),
+		};
+
+		let tree = match tip_reference.peel_to_tree()
+		{
+			Ok(value) => value,
+			Err(error) => panic!("Could not peel reference to tree: {}", error),
+		};
+
+		let object_id = match tree.get_path(file_path)
+		{
+			Ok(tree_entry) => tree_entry.id(),
+			Err(error) => return None,
+		};
+
+		let blob = match self.repository.find_blob(object_id)
+		{
+			Ok(blob) => blob,
+			Err(error) => return None,
+		};
+
+		let content = match std::str::from_utf8(blob.content())
+		{
+			Ok(content) => content,
+			Err(error) => panic!("Could not interpret file “{}” as UTF-8: {}", file_path.display(), error),
+		};
+
+		Some(content.to_owned())
+	}
+
+	fn prepare_autocommit_directory(&mut self)
+	{
+		match self.autocommit_thread
+		{
+			Some(_) => (),
+			None =>
+			{
+				let tmp_dir = match TempDir::new()
+				{
+					Ok(value) => value,
+					Err(error) => panic!("Could not create autocommit directory: {}", error),
+				};
+
+				let lock_file_path = tmp_dir.path().join(".lock");
+
+				if let Err(error) = File::create(&lock_file_path)
+				{
+					panic!("Could not create lock file “{}”: {}", lock_file_path.display(), error);
+				}
+
+				let (sender, receiver) = channel();
+
+				let watcher = match raw_watcher(sender)
+				{
+					Ok(value) => value,
+					Err(error) => panic!("Could not create filesystem watcher: {}", error),
+				};
+
+				self.autocommit_watcher = Some(watcher);
+				self.autocommit_directory = Some(tmp_dir);
+
+				trace!("{:#?}", receiver);
+
+				let thread = spawn(
+					move ||
+					{
+						trace!("Autocommit thread running");
+						trace!("{:#?}", receiver);
+
+						loop
+						{
+							match receiver.recv()
+							{
+								Ok(RawEvent{path: Some(path), op: Ok(Op::REMOVE), cookie: _}) =>
+								{
+									trace!("Received “remove” event for path “{}”", path.display());
+								},
+								Err(error) => panic!("Error handling notify event: {}", error),
+								_ => (),
+							}
+						}
+					});
+
+				self.autocommit_thread = Some(thread);
+			}
+		}
+	}
+
+	pub fn create_autocommit_directory(&mut self, directory_path: &Path, branch_name: &str) -> Result<PathBuf, String>
+	{
+		self.prepare_autocommit_directory();
+
+		let result_directory_path = self.autocommit_directory.as_ref().unwrap().path().join(branch_name).join(directory_path);
+
+		match create_dir_all(&result_directory_path)
+		{
+			Ok(_) => (),
+			Err(error) => panic!("Could not create result directory: {}", error),
+		}
+
+		{
+			let lock_file_path = result_directory_path.join(".lock");
+
+			if lock_file_path.exists()
+			{
+				panic!("Autocommit directory “{}” already locked", lock_file_path.display());
+			}
+
+			if let Err(error) = File::create(&lock_file_path)
+			{
+				panic!("Could not create temporary file “{}”: {}", lock_file_path.display(), error);
+			}
+		}
+
+		Ok(result_directory_path)
+	}
+
+	pub fn wait_for_autocommit_thread(mut self)
+	{
+		if let None = self.autocommit_thread
+		{
+			panic!("No autocommit thread started");
+		}
+
+		let autocommit_thread = self.autocommit_thread;
+
+		if let Err(RecvError) = autocommit_thread.unwrap().join()
+		{
+			panic!("Could not join autocommit thread");
+		}
+
+		self.autocommit_thread = None;
+	}
+}
+
+#[cfg(test)]
+mod tests
+{
+}