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} +temp-dir = "0.1.12" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..70682fb --- /dev/null +++ b/src/main.rs @@ -0,0 +1,429 @@ +use std::{ + fs::OpenOptions, + io::Write, + ops::Deref, + path::{Path, PathBuf}, +}; + +use clap::{Args, Parser, Subcommand}; +use config::Config; +use directories::ProjectDirs; +use miette::{miette, Context, IntoDiagnostic, Result}; + +use temp_dir::TempDir; +use utils::OptExt; + +mod utils; + +const COVER_LETTER_NAME: &str = "cover-letter"; + +#[derive(Parser, Debug)] +struct Arg { + #[arg( + long, + global = true, + help = "git repository to use, defaults to current repository" + )] + repo: Option, + #[command(subcommand)] + command: Command, +} + +#[derive(Subcommand, Debug)] +enum Command { + /// Format a patch. alias "p" + #[command(alias = "p")] + FormatPatch(FormatPatch), +} + +#[derive(Args, Debug)] +struct FormatPatch { + #[arg(short, long, help = "Branch to use (defaults to the current branch)")] + branch: Option, + #[arg(short, long, help = "Jenkins job number")] + ci: Option, + #[arg( + short, + long, + help = "Version of the patchset. Defaults to last patchset + 1" + )] + version: Option, + #[arg(long, help = "Override the current version of the patchset")] + force: bool, + #[arg(long, help = "Silence the CI warning")] + no_ci: bool, + #[arg(short, long, help = "Send the patches directly")] + send: bool, + #[arg(short, long, help = "Perform the interdiff with the supplied version")] + diff: Option, + #[arg( + short = 'B', + long, + help = "Reference for the interdiff (defaults to origin/master)" + )] + base_diff: Option, + extra_args: Vec, +} + +#[derive(Debug, serde::Deserialize)] +struct GsmConfig { + editor: String, + repo_url_base: String, + component: Option, + ci_url: Option, + interdiff_base: Option, +} + +fn git_bare(args: Vec<&str>) -> Result { + let out = duct::cmd("git", args) + .stderr_to_stdout() + .unchecked() + .stdout_capture() + .run() + .into_diagnostic() + .wrap_err("failed to launch git")?; + + let output = String::from_utf8_lossy(&out.stdout); + let output = output.trim(); + + if !out.status.success() { + return Err(miette!("{output}").wrap_err("git command failed")); + } else { + Ok(output.to_string()) + } +} + +fn main() -> Result<()> { + let args = Arg::parse(); + + let project_dir = ProjectDirs::from("net", "traxys", "git-series-manager") + .ok_or(miette!("Could not create project dirs"))?; + + let repo_root = args.repo.try_m_unwrap_or_else(|| { + Ok(PathBuf::from(git_bare(vec![ + "rev-parse", + "--show-toplevel", + ])?)) + })?; + let patch_dir = repo_root.join(".patches"); + + let git_cd = |args: &[&str]| { + let mut a = vec![ + "-C", + repo_root + .to_str() + .ok_or(miette!("{repo_root:?} is not a valid string"))?, + ]; + a.extend_from_slice(args); + + git_bare(a) + }; + + let config: GsmConfig = Config::builder() + .add_source( + config::File::from(project_dir.config_dir().join("config.toml")).required(false), + ) + .add_source(config::File::from(patch_dir.join("config.toml")).required(false)) + .build() + .into_diagnostic() + .wrap_err("Failed to read the configuration")? + .try_deserialize() + .into_diagnostic() + .wrap_err("Failed to deserialize the configuration")?; + + std::fs::create_dir_all(&patch_dir) + .into_diagnostic() + .wrap_err("could not create patch directory")?; + + match args.command { + Command::FormatPatch(args) => { + if config.ci_url.is_some() && args.ci.is_none() { + eprintln!("WARNING: CI was not specified\n"); + } + + let branch = args + .branch + .try_m_unwrap_or_else(|| Ok(git_cd(&["branch", "--show-current"])?))?; + + let component = config.component.try_m_unwrap_or_else(|| { + let url = git_cd(&["remote", "get-url", "origin"])?; + Ok(url + .strip_prefix(&config.repo_url_base) + .ok_or(miette!( + "remote {url} does not start with url base {}", + config.repo_url_base + ))? + .trim_end_matches(".git") + .to_string()) + })?; + + println!("Component: {component}"); + println!("Branch: {branch}"); + + let ci_link = match (config.ci_url, args.ci) { + (Some(ci_template), Some(id)) => Some( + ci_template + .replace("${component}", &component) + .replace("${branch}", &branch) + .replace("${ci_job}", &id.to_string()), + ), + (Some(ci_template), None) => Some( + ci_template + .replace("${component}", &component) + .replace("${branch}", &branch), + ), + (None, _) => None, + }; + + let branch_dir = patch_dir.join(&branch); + std::fs::create_dir_all(&branch_dir) + .into_diagnostic() + .wrap_err("could not create branch dir")?; + + let version = match args.version { + Some(v) => Some(v), + None => { + let mut dir_content = branch_dir + .read_dir() + .into_diagnostic() + .wrap_err("could not read branch dir")? + .peekable(); + + match dir_content.peek() { + Some(_) => Some( + dir_content + .into_iter() + .filter_map(|e| { + let entry = match e + .into_diagnostic() + .wrap_err("Could not read entry") + { + Ok(e) => e, + Err(e) => return Some(Err(e)), + }; + + let name = entry.file_name(); + let name = name.to_str().expect("patch set entry is not utf8"); + + if name == "cover-letter" { + None + } else { + Some(Ok(name.parse().expect("version is not an int"))) + } + }) + .try_fold(0, |cur, version| -> Result<_> { + let version = version?; + + Ok(std::cmp::max(version, cur)) + })? + + 1, + ), + None => None, + } + } + }; + + let version_dir = branch_dir.join(version.unwrap_or(1).to_string()); + + if version_dir.exists() { + if !args.force { + return Err(miette!( + "Patch dir {version_dir:?} exists, pass --force to delete it" + )); + } else { + std::fs::remove_dir_all(&version_dir).into_diagnostic()?; + } + } + + let version_dir = version_dir + .to_str() + .ok_or(miette!("Temp dir is not utf-8"))?; + + let format_patch = |extra_args: &[&str]| { + let mut format_patch_args = vec!["format-patch", "-o", &version_dir]; + let version_str = version.map(|s| s.to_string()); + + if let Some(version) = &version_str { + format_patch_args.push("-v"); + format_patch_args.push(version); + } + + let subject_prefix = format!(r#"--subject-prefix=PATCH {component}"#); + format_patch_args.extend_from_slice(&[&subject_prefix, "--cover-letter"]); + format_patch_args.extend_from_slice(extra_args); + format_patch_args.extend(args.extra_args.iter().map(|s| s.deref())); + + git_cd(&format_patch_args) + }; + + if let Some(interdiff) = args.diff { + let base = args + .base_diff + .or(config.interdiff_base) + .unwrap_or_else(|| String::from("origin/master")); + + struct TempBranch<'a> { + name: &'a str, + git: &'a dyn Fn(&[&str]) -> Result, + } + + impl<'a> Drop for TempBranch<'a> { + fn drop(&mut self) { + (self.git)(&["branch", "-D", self.name]).unwrap(); + } + } + + let branch = { + let name = "__patch_old"; + git_cd(&["branch", name, &base])?; + TempBranch { name, git: &git_cd } + }; + + struct GitWorktree { + _dir: TempDir, + path: String, + } + + impl GitWorktree { + pub fn exec(&self, args: &[&str]) -> Result { + let mut a = vec!["-C", &self.path]; + a.extend_from_slice(args); + + git_bare(a) + } + } + + impl Drop for GitWorktree { + fn drop(&mut self) { + self.exec(&["worktree", "remove", &self.path]).unwrap(); + } + } + + let wt = { + let worktree = temp_dir::TempDir::new() + .into_diagnostic() + .wrap_err("Could not create worktree directory")?; + + let worktree_path = worktree + .path() + .to_str() + .ok_or(miette!("Temp dir is not utf-8"))? + .to_string(); + + git_cd(&["worktree", "add", "--detach", &worktree_path])?; + + GitWorktree { + path: worktree_path, + _dir: worktree, + } + }; + + wt.exec(&["switch", branch.name])?; + + let patches = branch_dir + .join(&interdiff.to_string()) + .read_dir() + .into_diagnostic() + .wrap_err("Could not read interdiff folder")? + .map(|e| -> Result<_> { + let e = e + .into_diagnostic() + .wrap_err("Could not read interdiff entry")?; + + let path = e + .path() + .to_str() + .ok_or(miette!("Interdiff patch path is not utf-8"))? + .to_string(); + + match path.contains("cover-letter") { + true => Ok(None), + false => Ok(Some(path)), + } + }) + .filter_map(|e| e.transpose()) + .collect::>>()?; + let mut apply_args = vec!["am"]; + apply_args.extend(patches.iter().map(|s| s.deref())); + wt.exec(&apply_args)?; + + let interdiff_branch = format!("--interdiff={}", branch.name); + format_patch(&[&interdiff_branch])?; + } else { + format_patch(&[])?; + } + + let cover_letter = branch_dir.join(COVER_LETTER_NAME); + if !cover_letter.exists() { + let mut cover_letter_template = format!("Title: \n\nBranch: {branch}\n"); + if let Some(ci_link) = &ci_link { + cover_letter_template += &format!("CI: {ci_link}\n"); + } + + std::fs::write(&cover_letter, cover_letter_template) + .into_diagnostic() + .wrap_err("Could not write cover letter")?; + } + + std::process::Command::new(config.editor) + .arg(&cover_letter) + .status() + .into_diagnostic() + .wrap_err("Could not edit cover letter")?; + + let cover_letter = std::fs::read_to_string(cover_letter) + .into_diagnostic() + .wrap_err("Error while reading back the cover letter")?; + + let Some((title, body)) = cover_letter.split_once('\n') else { + return Err(miette!("Missing title newline")); + }; + + let Some(title) = title.strip_prefix("Title: ") else { + return Err(miette!("Missing `Title: ` prefix")); + }; + + let mut cover_letter = None; + for entry in Path::new(version_dir) + .read_dir() + .into_diagnostic() + .wrap_err("Could not read patch directory")? + { + let entry = entry + .into_diagnostic() + .wrap_err("Error while reading patch directory")?; + + if entry + .file_name() + .as_encoded_bytes() + .ends_with(b"cover-letter.patch") + { + cover_letter = Some(entry.file_name()); + } + } + + let cover_letter = Path::new(version_dir) + .join(cover_letter.ok_or(miette!("Did not find cover letter in {version_dir}"))?); + + let cover_letter_content = std::fs::read_to_string(&cover_letter) + .into_diagnostic() + .wrap_err("Could not read patchset cover letter")?; + + let cover_letter_content = cover_letter_content + .replace("*** SUBJECT HERE ***", title.trim()) + .replace("*** BLURB HERE ***", body.trim()); + + let mut file = OpenOptions::new() + .write(true) + .truncate(true) + .open(cover_letter) + .into_diagnostic() + .wrap_err("Could not re-open cover letter")?; + file.write(cover_letter_content.as_bytes()) + .into_diagnostic() + .wrap_err("Could not save cover letter")?; + + Ok(()) + } + } +} diff --git a/src/utils.rs b/src/utils.rs new file mode 100644 index 0000000..f92627a --- /dev/null +++ b/src/utils.rs @@ -0,0 +1,83 @@ +use std::mem::{self, ManuallyDrop}; + +/// Allows transmuting between types of different sizes. +/// +/// Necessary for transmuting in generic functions, since (as of Rust 1.51.0) +/// transmute doesn't work well with generic types. +/// +/// # Safety +/// +/// This function has the same safety requirements as [`std::mem::transmute_copy`]. +/// +/// # Example +/// +/// ```rust +/// use core_extensions::utils::transmute_ignore_size; +/// +/// use std::mem::MaybeUninit; +/// +/// unsafe fn transmute_into_init(array: [MaybeUninit; 3]) -> [T; 3] { +/// transmute_ignore_size(array) +/// } +/// +/// let array = [MaybeUninit::new(3), MaybeUninit::new(5), MaybeUninit::new(8)]; +/// +/// unsafe{ assert_eq!(transmute_into_init(array), [3, 5, 8]); } +/// +/// ``` +/// +/// This is the error you get if you tried to use `std::mem::transmute`. +/// +/// ```text +/// error[E0512]: cannot transmute between types of different sizes, or dependently-sized types +/// --> src/lib.rs:4:5 +/// | +/// 4 | std::mem::transmute(array) +/// | ^^^^^^^^^^^^^^^^^^^ +/// | +/// = note: source type: `[MaybeUninit; 3]` (size can vary because of T) +/// = note: target type: `[T; 3]` (size can vary because of T) +/// ``` +/// +/// +/// [`std::mem::transmute_copy`]: https://doc.rust-lang.org/std/mem/fn.transmute_copy.html +#[inline(always)] +pub unsafe fn transmute_ignore_size(v: T) -> U { + let v = ManuallyDrop::new(v); + mem::transmute_copy::(&v) +} + +pub trait TypeIdent { + type Type: ?Sized; + + #[inline(always)] + fn into_type(self) -> Self::Type + where + Self: Sized, + Self::Type: Sized, + { + unsafe { transmute_ignore_size(self) } + } +} + +impl TypeIdent for T { + type Type = T; +} + +pub trait OptExt: TypeIdent> + Sized { + fn try_unwrap_or_else(self, f: F) -> Result + where + F: Fn() -> Result, + { + self.into_type().map(Ok::).unwrap_or_else(f) + } + + fn try_m_unwrap_or_else(self, f: F) -> Result + where + F: Fn() -> Result, + { + self.try_unwrap_or_else(f) + } +} + +impl OptExt for Option {}