From b4dfdb09c8320116e17068a0068766ae0e2d0669 Mon Sep 17 00:00:00 2001
From: Michael Zhang <iptq@protonmail.com>
Date: Mon, 20 Apr 2020 00:21:26 -0500
Subject: [PATCH] initial

---
 .editorconfig             |    8 +
 .gitignore                |    2 +
 Cargo.lock                | 1661 +++++++++++++++++++++++++++++++++++++
 Cargo.toml                |   23 +
 config.toml               |    3 +
 fedhub.sublime-project    |   18 +
 rust-toolchain            |    1 +
 src/config.rs             |    9 +
 src/main.rs               |  223 +++++
 templates/index.html      |   14 +
 templates/repo_index.html |   15 +
 templates/repo_tree.html  |   15 +
 12 files changed, 1992 insertions(+)
 create mode 100644 .editorconfig
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 config.toml
 create mode 100644 fedhub.sublime-project
 create mode 100644 rust-toolchain
 create mode 100644 src/config.rs
 create mode 100644 src/main.rs
 create mode 100644 templates/index.html
 create mode 100644 templates/repo_index.html
 create mode 100644 templates/repo_tree.html

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..7a580a4
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,8 @@
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+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..41c1eff
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..f20a056
--- /dev/null
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..074321f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,23 @@
+[package]
+name = "fedhub"
+version = "0.1.0"
+authors = ["Michael Zhang <iptq@protonmail.com>"]
+edition = "2018"
+
+[dependencies]
+git2 = "0.13.0"
+serde = "1.0.105"
+serde_derive = "1.0.105"
+serde_json = "1.0.48"
+structopt = "0.3.12"
+tera = "1.2.0"
+toml = "0.5.6"
+tokio = { version = "0.2.18", features = ["full"] }
+anyhow = "1.0.28"
+walkdir = "2.3.1"
+lazy_static = "1.4.0"
+parking_lot = "0.10.2"
+hyper = "0.13.5"
+redis = "0.15.1"
+askama = "0.9.0"
+futures = "0.3.4"
diff --git a/config.toml b/config.toml
new file mode 100644
index 0000000..788df74
--- /dev/null
+++ b/config.toml
@@ -0,0 +1,3 @@
+addr = "127.0.0.1:3000"
+repo_root = "./repos"
+redis_url = "redis://127.0.0.1"
\ No newline at end of file
diff --git a/fedhub.sublime-project b/fedhub.sublime-project
new file mode 100644
index 0000000..830c85b
--- /dev/null
+++ b/fedhub.sublime-project
@@ -0,0 +1,18 @@
+{
+	"folders":
+	[
+		{
+			"path": "."
+		}
+	],
+	"settings":
+	{
+		"LSP":
+		{
+			"rust-analyzer":
+			{
+				"enabled": true
+			}
+		}
+	}
+}
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 0000000..bf867e0
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+nightly
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..698ec53
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,9 @@
+use std::net::SocketAddr;
+use std::path::PathBuf;
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Config {
+    pub addr: SocketAddr,
+    pub repo_root: PathBuf,
+    pub redis_url: String,
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..55ed9b9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,223 @@
+#![feature(async_closure)]
+
+#[macro_use]
+extern crate serde_derive;
+#[macro_use]
+extern crate serde_json;
+
+mod config;
+
+use std::convert::Infallible;
+use std::net::SocketAddr;
+use std::path::{Component as PathComponent, PathBuf};
+use std::sync::Arc;
+
+use anyhow::Result;
+
+use futures::future::{self, TryFutureExt};
+use git2::Repository;
+use hyper::{
+    service::{make_service_fn, service_fn},
+    Body, Request, Response, Server, StatusCode,
+};
+use lazy_static::lazy_static;
+use parking_lot::RwLock;
+use redis::{Client as RedisClient, Cmd as RedisCmd};
+use tera::{Context as TeraContext, Tera};
+use tokio::{fs::File, io::AsyncReadExt};
+use walkdir::WalkDir;
+
+use crate::config::Config;
+
+macro_rules! template {
+    ($file:expr) => {
+        ($file, include_str!(concat!("../templates/", $file)))
+    };
+}
+
+lazy_static! {
+    static ref TERA: Tera = {
+        let mut tera = Tera::default();
+        tera.add_raw_templates(vec![
+            template!("index.html"),
+            template!("repo_index.html"),
+            template!("repo_tree.html"),
+        ])
+        .unwrap();
+        tera
+    };
+}
+
+#[derive(Clone)]
+struct Fedhub {
+    config: Config,
+    state: Arc<RwLock<State>>,
+}
+
+#[derive(Clone)]
+struct State {
+    cache: RedisClient,
+}
+
+impl Fedhub {
+    pub fn new(config: Config) -> Result<Self> {
+        let cache = RedisClient::open(config.redis_url.as_ref())?;
+        Ok(Fedhub {
+            config,
+            state: Arc::new(RwLock::new(State { cache })),
+        })
+    }
+
+    pub async fn get_dir_list(&self) -> Result<Vec<PathBuf>> {
+        let state = self.state.read();
+        let mut con = state.cache.get_connection()?;
+        if RedisCmd::exists("repos").query(&mut con)? {
+            let path_strs: Vec<String> = RedisCmd::smembers("repos").query(&mut con)?;
+            return Ok(path_strs.into_iter().map(|s| PathBuf::from(s)).collect());
+        } else {
+            let repo_root = self.config.repo_root.clone();
+            let mut dir_iter = WalkDir::new(&repo_root).into_iter();
+            let mut dirs = Vec::new();
+            loop {
+                let entry = match dir_iter.next() {
+                    None => break,
+                    Some(Err(err)) => panic!("error: {:?}", err),
+                    Some(Ok(entry)) => entry,
+                };
+                let path = entry.path();
+                if let Ok(_) = Repository::open(path) {
+                    let new_path = path.strip_prefix(&repo_root).unwrap();
+                    dirs.push(new_path.to_path_buf());
+                    dir_iter.skip_current_dir();
+                }
+            }
+            RedisCmd::sadd(
+                "repos",
+                dirs.iter()
+                    .map(|path| path.to_str().unwrap().to_string())
+                    .collect::<Vec<_>>(),
+            )
+            .execute(&mut con);
+            Ok(dirs)
+        }
+    }
+
+    pub async fn render_index(&self) -> Result<Response<Body>> {
+        let directories = self.get_dir_list().await?;
+        let mut ctx = TeraContext::new();
+        ctx.insert("repos", &directories);
+        Ok(Response::new(TERA.render("index.html", &ctx)?.into()))
+    }
+
+    pub async fn render_repo_index(
+        &self,
+        path: PathBuf,
+        repo: Repository,
+    ) -> Result<Response<Body>> {
+        let mut ctx = TeraContext::new();
+        ctx.insert("name", &path);
+        let mut branches = Vec::new();
+        for branch in repo.branches(None)? {
+            let (branch, _) = branch?;
+            branches.push(branch.name()?.unwrap().to_string());
+        }
+        ctx.insert("branches", &branches);
+        return Ok(Response::new(TERA.render("repo_index.html", &ctx)?.into()));
+    }
+
+    pub async fn render_repo_tree(
+        &self,
+        path: PathBuf,
+        repo: Repository,
+        tree: String,
+    ) -> Result<Response<Body>> {
+        let commit_ref = repo.resolve_reference_from_short_name(tree.as_ref())?;
+        let commit = commit_ref.peel_to_commit()?;
+        let tree = commit.tree()?;
+        let mut ctx = TeraContext::new();
+        ctx.insert("name", &path);
+        ctx.insert("ref", commit_ref.shorthand().unwrap());
+        let mut entries = Vec::new();
+        for entry in tree.iter() {
+            entries.push(json!({
+                "name": entry.name().unwrap(),
+            }));
+        }
+        ctx.insert("entries", &entries);
+        return Ok(Response::new(TERA.render("repo_tree.html", &ctx)?.into()));
+    }
+
+    pub async fn handle(self, req: Request<Body>) -> Result<Response<Body>> {
+        let repo_root = self.config.repo_root.clone();
+        let uri = req.uri();
+        let path = uri.path();
+
+        if path == "/" {
+            return self.render_index().await;
+        }
+
+        let repo_info = {
+            let mut repo_info = None;
+            for repo_dir in self.get_dir_list().await? {
+                let path = PathBuf::from(path.trim_start_matches("/"));
+                if path.starts_with(&repo_dir) {
+                    let repo = Repository::open(repo_root.join(&repo_dir))?;
+                    let remainder = PathBuf::from("/").join(path.strip_prefix(&repo_dir)?);
+                    repo_info = Some((repo_dir, repo, remainder));
+                }
+            }
+            repo_info
+        };
+
+        if let Some((path, repo, remainder)) = repo_info {
+            if remainder == PathBuf::from("/") {
+                return self.render_repo_index(path, repo).await;
+            } else if remainder.starts_with("/tree") {
+                let tree = remainder.strip_prefix("/tree").unwrap().components().next();
+                if let Some(PathComponent::Normal(tree)) = tree {
+                    return self
+                        .render_repo_tree(path, repo, tree.to_str().unwrap().to_string())
+                        .await;
+                }
+            }
+        }
+
+        Ok(Response::builder()
+            .status(StatusCode::NOT_FOUND)
+            .body("not found".into())
+            .unwrap())
+    }
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let mut config_file = File::open("config.toml").await?;
+    let mut config_str = String::new();
+    config_file.read_to_string(&mut config_str).await?;
+
+    let config = toml::from_str::<Config>(&config_str)?;
+    println!("Config: {:?}", config);
+    let fedhub = Fedhub::new(config)?;
+
+    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
+
+    let make_svc = make_service_fn(move |_conn| {
+        let fedhub = fedhub.clone();
+        let main = move |req| {
+            let fedhub = fedhub.clone();
+            fedhub.handle(req).or_else(|err| {
+                eprintln!("Error: {:?}", err);
+                future::ok::<_, Infallible>(Response::new(Body::from(format!("Error: {:?}", err))))
+            })
+        };
+
+        future::ok::<_, Infallible>(service_fn(main))
+    });
+
+    let server = Server::bind(&addr).serve(make_svc);
+    if let Err(e) = server.await {
+        eprintln!("server error: {}", e);
+    }
+
+    unreachable!()
+}
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..d291fa8
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,14 @@
+<html>
+    <head>
+    </head>
+
+    <body>
+        <h1>Fedhub</h1>
+
+        <ul>
+            {% for repo in repos %}
+                <li><a href="/{{ repo }}">{{ repo }}</a></li>
+            {% endfor %}
+        </ul>
+    </body>
+</html>
diff --git a/templates/repo_index.html b/templates/repo_index.html
new file mode 100644
index 0000000..5b1693c
--- /dev/null
+++ b/templates/repo_index.html
@@ -0,0 +1,15 @@
+<html>
+    <head>
+    </head>
+
+    <body>
+        <h1>{{ name }}</h1>
+
+        <h3>branches:</h3>
+        <ul>
+            {% for branch in branches %}
+                {{ branch }}
+            {% endfor %}
+        </ul>
+    </body>
+</html>
diff --git a/templates/repo_tree.html b/templates/repo_tree.html
new file mode 100644
index 0000000..957a182
--- /dev/null
+++ b/templates/repo_tree.html
@@ -0,0 +1,15 @@
+<html>
+    <head>
+    </head>
+
+    <body>
+        <h1>{{ name }}: {{ ref }}</h1>
+
+        <h3>entries:</h3>
+        <ul>
+            {% for entry in entries %}
+                <li>{{ entry.name }}</li>
+            {% endfor %}
+        </ul>
+    </body>
+</html>