From 43d792e1485823424c3e8f53cc84faa4256bd5d2 Mon Sep 17 00:00:00 2001 From: Nilstrieb <48135649+Nilstrieb@users.noreply.github.com> Date: Thu, 18 Jan 2024 19:45:39 +0100 Subject: [PATCH] Submodules --- .envrc | 1 + .gitignore | 2 + Cargo.lock | 504 +++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 12 ++ README.md | 3 + shell.nix | 3 + src/main.rs | 22 +++ src/submodule.rs | 140 +++++++++++++ src/utils.rs | 21 ++ submodules.toml | 4 + 10 files changed, 712 insertions(+) create mode 100644 .envrc create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 README.md create mode 100644 shell.nix create mode 100644 src/main.rs create mode 100644 src/submodule.rs create mode 100644 src/utils.rs create mode 100644 submodules.toml diff --git a/.envrc b/.envrc new file mode 100644 index 0000000..1d953f4 --- /dev/null +++ b/.envrc @@ -0,0 +1 @@ +use nix diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..fa80870 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b/Cargo.toml @@ -0,0 +1,12 @@ +[package] +name = "website" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +color-eyre = "0.6.2" +toml = "0.8.8" +tracing = "0.1.40" +tracing-subscriber = { version = "0.3.18", features = ["env-filter"] } diff --git a/README.md b/README.md new file mode 100644 index 0000000..bbc767d --- /dev/null +++ b/README.md @@ -0,0 +1,3 @@ +# website + +good bad static site builder in rust built on top of other things mostly sort of diff --git a/shell.nix b/shell.nix new file mode 100644 index 0000000..6d1eedc --- /dev/null +++ b/shell.nix @@ -0,0 +1,3 @@ +{ pkgs ? import {} }: pkgs.mkShell { + packages = with pkgs; [ rustup ]; +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..b96d1bf --- /dev/null +++ b/src/main.rs @@ -0,0 +1,22 @@ +mod submodule; +mod utils; + +#[macro_use] +extern crate tracing; + +use color_eyre::{eyre::Context, Result}; +use tracing_subscriber::EnvFilter; + +fn main() -> Result<()> { + tracing_subscriber::fmt().with_env_filter(EnvFilter::from_default_env()).init(); + + let sub_config = + std::fs::read_to_string("submodules.toml").wrap_err("reading ./submodules.toml")?; + let sub_config = + submodule::Submodules::parse(&sub_config).wrap_err("invalid submodules.toml")?; + submodule::sync(&sub_config).wrap_err("syncing subtrees")?; + + info!("Hello, world!"); + + Ok(()) +} diff --git a/src/submodule.rs b/src/submodule.rs new file mode 100644 index 0000000..7f696ab --- /dev/null +++ b/src/submodule.rs @@ -0,0 +1,140 @@ +//! Implements a simplistic form of git submodules. +//! +//! The config format is as follows: +//! +//! A list of +//! ```toml +//! [[submodule]] +//! name = "" +//! url = "" +//! commit = "" +//! ``` +//! +//! For example, +//! ```toml +//! [[submodule]] +//! name = "nixos" +//! url = "https://github.com/Nilstrieb/nixos.git" +//! commit = "c5b2fc10b9266b105d792d958b8f13479866a7bd" +//! ``` +//! +//! This module will check them out into a directory called `submodules` in the current directory. +//! Make sure to put this directory into `.gitignore`. + +use std::{io, path, process}; + +use color_eyre::{ + eyre::{Context, OptionExt}, + Result, +}; + +use crate::utils; + +pub struct Submodules { + configs: Vec, +} + +pub struct SyncConfig { + name: String, + url: String, + commit: String, +} + +impl Submodules { + pub fn parse(s: &str) -> Result { + let doc = s.parse::().wrap_err("invalid toml")?; + let subs = doc + .get("submodule") + .ok_or_eyre("no top-level submodule tables")?; + let mods = subs.as_array().ok_or_eyre("submodule is not an array")?; + + let mut configs = Vec::new(); + + for module in mods { + let map = module.as_table().ok_or_eyre("submodule is not a table")?; + + let get_str = |name| -> Result { + Ok(map + .get(name) + .ok_or_eyre(format!("{name} is missing"))? + .as_str() + .ok_or_eyre(format!("{name} is not a string"))? + .into()) + }; + + configs.push(SyncConfig { + name: get_str("name")?, + url: get_str("url")?, + commit: get_str("commit")?, + }); + } + + Ok(Self { configs }) + } +} + +pub fn sync(config: &Submodules) -> color_eyre::Result<()> { + info!("Syncing submodules..."); + + let submodules_path = path::Path::new("submodules"); + + match std::fs::create_dir(submodules_path) { + Ok(()) => info!("Created ./submodules"), + Err(e) if e.kind() == io::ErrorKind::AlreadyExists => {} + e => return e.wrap_err("failed to create submodules"), + } + + for sync in &config.configs { + let name = &sync.name; + let url = sync.url.as_str(); + + let span = info_span!("Syncing submodule", ?name, ?url); + let _span = span.enter(); + + let sub_path = submodules_path.join(name); + if !sub_path.exists() { + info!(?name, ?url, "Cloning"); + let mut cmd = process::Command::new("git"); + cmd.args(&["clone", url, sub_path.to_str().unwrap()]); + utils::run_process(&mut cmd).wrap_err("running git clone")?; + } else { + debug!(?name, ?url, "Repo already exists"); + } + + let current_commit = utils::run_process( + process::Command::new("git") + .args(&["rev-parse", "HEAD"]) + .current_dir(&sub_path), + ) + .wrap_err("running git rev-parse HEAD")?; + + debug!(?current_commit, "Current commit"); + + if current_commit.trim() != sync.commit { + info!("Need to change commit"); + let commit_exists = utils::run_process( + process::Command::new("git") + .args(&["cat-file", "-t", sync.commit.as_str()]) + .current_dir(&sub_path), + ); + if !commit_exists.is_ok_and(|typ| typ == "commit\n".to_owned()) { + info!("Must fetch commit"); + utils::run_process(process::Command::new("git").current_dir(&sub_path).args(&[ + "fetch", + "origin", + sync.commit.as_str(), + ])) + .wrap_err("git fetch")?; + } + + utils::run_process(process::Command::new("git").current_dir(&sub_path).args(&[ + "reset", + "--hard", + sync.commit.as_str(), + ])) + .wrap_err("git reset --hard")?; + } + } + + Ok(()) +} diff --git a/src/utils.rs b/src/utils.rs new file mode 100644 index 0000000..15f6fc9 --- /dev/null +++ b/src/utils.rs @@ -0,0 +1,21 @@ +use color_eyre::{ + eyre::{bail, Context}, + Result, +}; +use std::process::Command; + +pub fn run_process(cmd: &mut Command) -> Result { + let name = cmd.get_program().to_os_string(); + let output = cmd + .output() + .wrap_err(format!("failed to spawn process {name:?}"))?; + + if !output.status.success() { + bail!( + "command returned error: {}", + String::from_utf8(output.stderr).wrap_err("stderr is not UTF-8")? + ); + } + + Ok(String::from_utf8(output.stdout).wrap_err("stdout is not UTF-8")?) +} diff --git a/submodules.toml b/submodules.toml new file mode 100644 index 0000000..b5cb0a6 --- /dev/null +++ b/submodules.toml @@ -0,0 +1,4 @@ +[[submodule]] +name = "blog" +url = "https://github.com/Nilstrieb/nilstrieb.github.io.git" +commit = "a48053540e1bc85403c25526de304e82f5371a22"