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name = "windows_x86_64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
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version = "0.6.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b2986deb581c4fe11b621998a5e53361efe6b48a151178d0cd9eeffa4dc6acc9"
dependencies = [
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20
Cargo.toml
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[package]
name = "cargo-vcs"
version = "0.1.0"
description = "Cargo Version Control System helper"
edition = "2021"
license = "AGPL-3.0-only"
authors = ["Aleš Katona <ales@katona.me>"]
rust-version = "1.59"
readme = "README.md"
keywords = ["cargo", "git", "versioning", "workspace"]
categories = ["development-tools::cargo-plugins", "command-line-utilities"]
[dependencies]
clap = { version = "3.2", features = ["derive"] }
crossterm = "0.24"
git2 = "0.14"
machine-uid = "0.2"
semver = "1.0"
termtree = "0.4"
toml = "0.5"

661
LICENSE
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GNU AFFERO GENERAL PUBLIC LICENSE
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You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

3
README.md
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# Cargo Version Control System extension
Cargo-vcs is a Cargo extension that adds version control helpers to help manage workspaces.

42
src/main.rs
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use clap::Parser;
mod vcs;
use vcs::cli::*;
fn main() {
let args = Cli::parse();
let work_dir = args
.path
.unwrap_or_else(|| std::env::current_dir().expect("Unable to obtain current_dir"));
let mut vcs = match vcs::Vcs::new(work_dir) {
Ok(val) => val,
Err(err) => {
eprintln!("{}", err);
std::process::exit(err.exit_code());
}
};
match args.command {
Commands::Branch(BranchCommand::Set { branch }) => {
vcs.set_branch(&branch)
.expect("Error setting branch on projects");
}
Commands::Profile(ProfileCommand::Save { profile }) => {
vcs.save_profile(&profile)
.expect("Error saving vcs profile");
}
Commands::Profile(ProfileCommand::Set { profile }) => {
vcs.set_profile(&profile)
.expect("Error setting vcs profile");
}
Commands::Status { verbose } => {
if verbose {
vcs.list();
} else {
vcs.info().expect("Error summarizing info");
}
}
}
}

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src/vcs.rs
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use crossterm::style::Stylize;
use std::{
collections::HashMap,
fs,
path::{Path, PathBuf},
};
use toml::{
value::{Map, Table},
Value,
};
pub mod cli;
mod colors;
mod error;
mod project;
mod systems;
use colors::*;
pub use error::*;
pub use project::*;
pub struct Vcs {
work_dir: PathBuf,
profiles: Vec<String>,
projects: Vec<Project>,
}
impl Vcs {
pub fn new(work_dir: PathBuf) -> Result<Self, Error> {
// find Cargo.toml recursively from given path
let toml_path = Self::search(&work_dir)?;
// set work_dir to Cargo.toml parent folder
let work_dir = toml_path
.parent()
.ok_or_else(|| {
Error::input_error(
"Invalid work_dir found",
toml_path.to_str().expect("Invalid UTF-8 in path"),
)
})?
.to_path_buf();
if !toml_path.exists() {
return Err(Error::input_error(
"work_dir invalid",
&work_dir.display().to_string(),
));
}
if !toml_path.exists() {
return Err(Error::input_error(
"Unable to find Cargo.toml",
&toml_path.display().to_string(),
));
}
let workspace = Self::get_workspace_toml(&toml_path)?;
let members = workspace
.get("members")
.ok_or_else(|| Error::cargo_error("Cargo.toml missing [members] array"))?
.as_array()
.ok_or_else(|| Error::cargo_error("Cargo.toml [members] is not an array"))?
.to_owned();
let vcs_path = work_dir.join("Cargo_vcs.toml");
let profiles_map = if vcs_path.exists() {
let vcs_contents = fs::read_to_string(vcs_path)?;
let vcs: toml::Value = toml::from_str(&vcs_contents)?;
let vcs_main = vcs
.as_table()
.ok_or_else(|| Error::cargo_error("Cargo_vcs.toml is not a yaml table"))?
.to_owned();
Self::find_profiles(&vcs_main)?
} else {
HashMap::new()
};
let profiles = profiles_map.keys().cloned().collect();
let projects = Self::process_repos(&work_dir, &members, &profiles_map)?;
Ok(Self {
work_dir,
profiles,
projects,
})
}
pub fn list(&self) {
for project in self.projects() {
println!("{}", project);
}
}
pub fn info(&self) -> Result<(), Error> {
if let Some(profile_name) = self.current_profile()? {
println!(
"{}{} [{}]",
"Workspace is set to profile: ".with(SUCCESS_COLOR),
profile_name.bold().with(PROFILE_COLOR),
format!("{}", self.work_dir.display()).italic(),
);
} else {
println!("{}", "Mismatching projects and profiles".with(ERROR_COLOR));
self.list();
}
Ok(())
}
pub fn projects(&self) -> Projects<'_> {
self.projects.iter()
}
pub fn save_profile(&self, profile_name: &str) -> Result<(), Error> {
let vcs_path = self.work_dir.join("Cargo_vcs.toml");
let vcs = match fs::read_to_string(&vcs_path) {
Ok(val) => toml::from_str(&val)?,
Err(_) => Value::Table(Map::new()),
};
let mut vcs_main = vcs
.as_table()
.ok_or_else(|| Error::cargo_error("Cargo_vcs.toml is not a yaml table"))?
.to_owned();
let value = self.current_profile_toml_value()?;
if let Some(vcs_section) = vcs_main.get_mut("vcs") {
if let Some(section) = vcs_section.as_table_mut() {
section.insert(profile_name.into(), value);
} else {
return Err(Error::Upstream(Box::new(toml::ser::Error::Custom(
"Existing vcs section not a table".into(),
))));
}
} else {
let mut section = Table::new();
section.insert(profile_name.into(), value);
vcs_main.insert("vcs".into(), Value::Table(section));
}
let new_contents = toml::to_string(&vcs_main)?;
fs::write(vcs_path, new_contents)?;
println!(
"{}{}",
"Workspace state saved as ".with(SUCCESS_COLOR),
profile_name.with(PROFILE_COLOR),
);
Ok(())
}
pub fn set_profile(&mut self, profile_name: &str) -> Result<(), Error> {
if !self.profiles.contains(&String::from(profile_name)) {
eprintln!(
"{}{}",
"Profile not found: ".with(ERROR_COLOR),
profile_name.with(PROFILE_COLOR)
);
return Ok(());
}
let current_profile = self.current_profile()?;
for project in &mut self.projects {
let mut stashed_changes = false;
if let Some(current_profile_name) = &current_profile {
stashed_changes = project.repo.stash_changes(current_profile_name)?;
}
let ref_name = project.switch_to_profile(profile_name)?;
let unstashed_changes = project.repo.unstash_changes(profile_name)?;
println!(
"{} set to {} {}{}",
project.name().bold().with(PROJECT_COLOR),
ref_name.with(REFS_COLOR),
if stashed_changes {
"«".cyan()
} else {
"".bold()
},
if unstashed_changes {
"»".dark_blue()
} else {
"".bold()
},
);
}
Ok(())
}
pub fn set_branch(&self, branch_name: &str) -> Result<(), Error> {
for project in &self.projects {
project.repo.checkout(branch_name)?;
println!(
"{}{}{}",
project.name().with(PROJECT_COLOR),
" is set to branch: ".with(SUCCESS_COLOR),
branch_name.bold().with(REFS_COLOR),
);
}
Ok(())
}
fn current_profile_toml_value(&self) -> Result<Value, Error> {
let mut table = Table::new();
for project in &self.projects {
let head_ref_name = project.repo.current_ref()?;
table.insert(project.name().into(), Value::String(head_ref_name));
}
Ok(Value::Table(table))
}
fn current_profile(&self) -> Result<Option<String>, Error> {
let mut found_profile = None;
for project in &self.projects {
match project.current_profile()? {
None => return Ok(None), // gap
Some(project_profile) => match &mut found_profile {
Some(previous) => {
if previous != &project_profile {
return Ok(None); // mismatch
}
}
None => {
found_profile.replace(project_profile);
}
},
}
}
Ok(found_profile)
}
fn find_profiles(
vcs_main: &Map<String, Value>,
) -> Result<HashMap<String, HashMap<String, String>>, Error> {
let mut result = HashMap::new();
if let Some(vcs_section) = vcs_main.get("vcs") {
if let Some(vcs) = vcs_section.as_table() {
for profile in vcs {
if let Some(repo_to_branch) = profile.1.as_table() {
let mut names = HashMap::new();
for rtb in repo_to_branch {
let project_name = rtb.0.clone();
let branch_name = rtb.1.as_str().ok_or_else(|| {
Error::project_error("Invalid UTF-8 in branch name")
})?;
names.insert(project_name, branch_name.to_owned());
}
let profile_name = profile.0.clone();
result.insert(profile_name, names);
}
}
}
}
Ok(result)
}
fn process_repos(
work_dir: &Path,
members: &Vec<Value>,
profiles: &HashMap<String, HashMap<String, String>>,
) -> Result<Vec<Project>, Error> {
let mut projects = Vec::new();
for member in members {
let repo_postfix = member
.as_str()
.ok_or_else(|| Error::project_error("Repo not a string"))?;
let repo_path = work_dir.join(repo_postfix);
let repo_basename = Path::new(repo_postfix)
.components()
.last()
.ok_or_else(|| Error::project_error("Repo basename not found"))?
.as_os_str()
.to_str()
.ok_or_else(|| Error::project_error("Repo basename not valid UTF-8"))?;
let mut profile_map = HashMap::new();
for profile in profiles {
if let Some(branch_name) = profile.1.get(repo_basename) {
profile_map.insert(profile.0.clone(), branch_name.clone());
}
}
projects.push(Project::new(repo_path, profile_map)?);
}
Ok(projects)
}
fn search(path: &Path) -> Result<PathBuf, Error> {
let path_str = path.to_str().expect("Invalid UTF-8 in path");
if !path.exists() {
return Err(Error::input_error("Search path not found", path_str));
}
if !path.is_dir() {
return Err(Error::input_error("Search path not a directory", path_str));
}
let mut path = path;
loop {
let try_cargo = path.join("Cargo.toml");
if try_cargo.exists() && Self::get_workspace_toml(&try_cargo).is_ok() {
return Ok(try_cargo);
} else {
path = path
.parent()
.ok_or_else(|| Error::input_error("Workspace not found", path_str))?;
}
}
}
fn get_workspace_toml(path: &Path) -> Result<Map<String, Value>, Error> {
let toml_contents = fs::read_to_string(path)?;
let cargo: toml::Value = toml::from_str(&toml_contents)?;
let cargo_main = cargo
.as_table()
.ok_or_else(|| Error::cargo_error("Cargo.toml is not a yaml table"))?
.to_owned();
let workspace = cargo_main
.get("workspace")
.ok_or_else(|| Error::cargo_error("Cargo.toml is not a workspace"))?
.as_table()
.ok_or_else(|| Error::cargo_error("Cargo.toml [workspace] is not a table"))?
.to_owned();
Ok(workspace)
}
}

46
src/vcs/cli.rs
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use clap::Parser;
use std::path::PathBuf;
/// A fictional versioning CLI
#[derive(Debug, Parser)]
#[clap(name = "cargo-vcs")]
#[clap(about = "Version control helper for Cargo", long_about = None)]
pub struct Cli {
#[clap(subcommand)]
pub command: Commands,
/// Path to workspace folder, defaults to CWD
#[clap(short = 'p')]
pub path: Option<PathBuf>,
}
#[derive(Debug, Parser)]
pub enum Commands {
/// Show workspace status
Status {
#[clap(short = 'v')]
verbose: bool,
},
/// Set or save profiles
#[clap(subcommand)]
Profile(ProfileCommand),
/// Set branch globally on workspace
#[clap(subcommand)]
Branch(BranchCommand),
}
#[derive(Debug, Parser)]
pub enum ProfileCommand {
/// Save the current workspace VCS state to Cargo_vcs.toml under given profile name
#[clap(arg_required_else_help = true)]
Save { profile: String },
/// Switch workspace to given profile
#[clap(arg_required_else_help = true)]
Set { profile: String },
}
#[derive(Debug, Parser)]
pub enum BranchCommand {
/// Switch all projects in workspace to given branch
#[clap(arg_required_else_help = true)]
Set { branch: String },
}

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src/vcs/colors.rs
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use crossterm::style::Color;
pub const PROJECT_COLOR: Color = Color::Red;
pub const PROFILE_COLOR: Color = Color::Blue;
pub const SUCCESS_COLOR: Color = Color::Green;
pub const ERROR_COLOR: Color = Color::DarkRed;
pub const CHANGES_COLOR: Color = Color::Cyan;
pub const REFS_COLOR: Color = Color::DarkYellow;
pub const MSRV_COLOR: Color = Color::DarkCyan;

88
src/vcs/error.rs
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use crossterm::style::{StyledContent, Stylize};
use std::fmt::Display;
#[derive(Debug)]
pub enum Error {
/// Any upstream library error
Upstream(Box<dyn std::error::Error>),
/// Cargo.toml specific logical errors
Cargo(String),
/// Project/repo status logical errors
Project(String),
/// Input selection errors (e.g. bad profile name)
Input(String),
}
impl From<git2::Error> for Error {
fn from(ge: git2::Error) -> Self {
Error::Upstream(Box::new(ge))
}
}
impl From<std::io::Error> for Error {
fn from(ie: std::io::Error) -> Self {
Error::Upstream(Box::new(ie))
}
}
impl From<toml::de::Error> for Error {
fn from(tde: toml::de::Error) -> Self {
Error::Upstream(Box::new(tde))
}
}
impl From<toml::ser::Error> for Error {
fn from(tse: toml::ser::Error) -> Self {
Error::Upstream(Box::new(tse))
}
}
impl From<semver::Error> for Error {
fn from(se: semver::Error) -> Self {
Error::Upstream(Box::new(se))
}
}
impl From<Box<dyn std::error::Error>> for Error {
fn from(other: Box<dyn std::error::Error>) -> Self {
Error::Upstream(other)
}
}
impl Error {
pub fn cargo_error(line: &str) -> Self {
Error::Cargo(line.into())
}
pub fn input_error(line: &str, value: &str) -> Self {
Error::Input(format!("{}: {}", line, value))
}
pub fn project_error(line: &str) -> Self {
Error::Project(line.into())
}
pub fn exit_code(&self) -> i32 {
match self {
Self::Upstream(_) => 10,
Self::Cargo(_) => 11,
Self::Project(_) => 12,
Self::Input(_) => 13,
}
}
fn to_styled(&self) -> StyledContent<String> {
match self {
Self::Upstream(e) => e.to_string().red(),
Self::Cargo(e) => e.to_string().cyan(),
Self::Project(e) => e.to_string().yellow(),
Self::Input(e) => e.to_string().dark_red(),
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.to_styled())
}
}

167
src/vcs/project.rs
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use std::{
collections::HashMap,
fmt::Display,
path::{Path, PathBuf},
};
use crossterm::style::Stylize;
use semver::Version;
use termtree::Tree;
use super::colors::*;
use super::error::Error;
use super::systems::{git::GitRepository, Repository};
pub struct Project {
path: PathBuf,
name: String,
msrv: Option<Version>,
pub repo: Box<dyn Repository>,
profile_map: HashMap<String, String>, // vcs profile name to branch names
}
pub type Projects<'origin> = std::slice::Iter<'origin, Project>;
impl Project {
pub fn new(path: PathBuf, profile_map: HashMap<String, String>) -> Result<Self, Error> {
let name = path
.components()
.last()
.ok_or_else(|| Error::project_error("Unable to get project name"))?
.as_os_str()
.to_str()
.ok_or_else(|| Error::project_error("Project path contains invalid UTF-8"))?
.to_owned();
let repo = GitRepository::open(&path)?;
let msrv = Self::parse_msrv(&path)?;
Ok(Self {
path,
name,
msrv,
repo,
profile_map,
})
}
pub fn name(&self) -> &str {
&self.name
}
pub fn path(&self) -> &Path {
&self.path
}
pub fn current_profile(&self) -> Result<Option<String>, Error> {
let current_ref = self.repo.current_ref()?;
if let Some(val) = self.profile_map.iter().find(|v| v.1 == &current_ref) {
return Ok(Some(val.0.clone()));
}
Ok(None)
}
pub fn switch_to_profile(&self, profile_name: &str) -> Result<String, Error> {
if let Some(ref_name) = self.profile_map.get(profile_name) {
self.repo.checkout(ref_name)?;
Ok(ref_name.into())
} else {
Err(Error::input_error(
"Unable to find profile for branch",
self.name(),
))
}
}
fn parse_msrv(path: &Path) -> Result<Option<Version>, Error> {
let toml_path = path.join("Cargo.toml");
let toml_contents = std::fs::read_to_string(toml_path)?;
let cargo: toml::Value = toml::from_str(&toml_contents)?;
if let Some(pkg) = cargo.get("package") {
if let Some(value) = pkg.get("rust-version") {
if value.is_str() {
let mut ver_str = value
.as_str()
.ok_or_else(|| Error::cargo_error("Unparsable rust-version in Cargo.toml"))?
.to_owned();
let dots = ver_str.chars().filter(|c| *c == '.').count();
if !(1..=2).contains(&dots) {
return Err(Error::cargo_error("Invalid rust-version in Cargo.toml"));
}
// TODO: figure out if we can un-hack this
if dots == 1 {
ver_str += ".0"; // make 1.59 -> 1.59.0 for semver comparisons
}
let ver_req = Version::parse(&ver_str)?;
return Ok(Some(ver_req));
}
}
}
Ok(None)
}
pub fn display(&self, profiles: bool, changes: bool) -> Result<Tree<String>, Error> {
let title = format!(
"{}: {} [{}]",
self.name().bold().with(PROJECT_COLOR),
self.repo.current_ref()?.with(REFS_COLOR),
format!("{}", self.path().display()).italic(),
);
let mut root = Tree::new(title);
if profiles {
let mut profiles_tree = Tree::new("[PROFILES]".with(PROFILE_COLOR).to_string());
for (profile_name, branch_name) in &self.profile_map {
let leaf = Tree::new(format!(
"{} -> {}",
profile_name.as_str().with(PROFILE_COLOR),
branch_name.as_str().with(REFS_COLOR)
));
profiles_tree.push(leaf);
}
root.push(profiles_tree);
}
if changes {
let statuses = self.repo.uncommitted_changes()?;
let uncommitted = statuses
.iter()
.map(|path| Tree::<String>::new(path.as_str().with(CHANGES_COLOR).to_string()));
let mut changes_tree = Tree::new("[CHANGES]".with(CHANGES_COLOR).to_string());
let mut change_count = 0;
for change in uncommitted {
change_count += 1;
changes_tree.push(change);
}
if change_count > 0 {
root.push(changes_tree);
}
}
if let Some(msrv) = &self.msrv {
let leaf = Tree::new(msrv.to_string().with(MSRV_COLOR).to_string());
let mut msrv_tree = Tree::new("[MSRV]".with(MSRV_COLOR).to_string());
msrv_tree.push(leaf);
root.push(msrv_tree);
}
Ok(root)
}
}
impl Display for Project {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
self.display(true, true).map_err(|_| std::fmt::Error)?
)
}
}

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src/vcs/systems.rs
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pub mod git;
use super::Error;
pub trait Repository {
fn current_ref(&self) -> Result<String, Error>;
fn checkout(&self, ref_name: &str) -> Result<(), Error>;
fn stash_changes(&mut self, profile_name: &str) -> Result<bool, Error>;
fn unstash_changes(&mut self, profile_name: &str) -> Result<bool, Error>;
fn uncommitted_changes(&self) -> Result<Vec<String>, Error>;
}

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src/vcs/systems/git.rs
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use std::path::Path;
use super::{Error, Repository};
pub struct GitRepository {
repo: git2::Repository,
machine_id: String,
}
impl Repository for GitRepository {
fn current_ref(&self) -> Result<String, Error> {
if self.repo.head_detached()? {
self.match_tag()
} else {
let head_ref = self.repo.head()?;
let name = head_ref
.name()
.ok_or_else(|| Error::project_error("Unable to retreive HEAD reference"))?
.into();
Ok(name)
}
}
fn checkout(&self, name: &str) -> Result<(), Error> {
let target_ref = self.repo.resolve_reference_from_short_name(name)?;
let ref_name = target_ref
.name()
.ok_or_else(|| Error::project_error("Invalid UTF-8 in git reference"))?;
self.checkout_ref(ref_name)?;
self.repo.set_head(ref_name)?;
Ok(())
}
fn stash_changes(&mut self, profile_name: &str) -> Result<bool, Error> {
if self.uncommitted_changes()?.is_empty() {
return Ok(false);
}
let repo_signature = self.repo.signature()?;
let stash_name = self.stash_name(profile_name);
self.repo.stash_save(&repo_signature, &stash_name, None)?;
Ok(true)
}
fn unstash_changes(&mut self, profile_name: &str) -> Result<bool, Error> {
let mut found_stash = None;
let stash_name = self.stash_name(profile_name);
self.repo.stash_foreach(|idx, name, _| {
if name.contains(&stash_name) {
if found_stash.is_none() {
found_stash.replace(Ok(idx));
} else {
found_stash
.replace(Err(Error::project_error("Multiple stashed changes found")));
}
}
true
})?;
match found_stash {
Some(Ok(idx)) => {
self.repo.stash_apply(idx, None)?;
self.repo.stash_drop(idx)?;
Ok(true)
}
Some(Err(err)) => Err(err),
None => Ok(false),
}
}
fn uncommitted_changes(&self) -> Result<Vec<String>, Error> {
if self.repo.state() != git2::RepositoryState::Clean {
let err = format!(
"{} repository not in clean state",
self.repo.path().display()
);
return Err(Error::Project(err));
}
let mut status_options = git2::StatusOptions::new();
status_options.include_ignored(false);
status_options.include_untracked(false);
let iter = self
.repo
.statuses(Some(&mut status_options))?
.iter()
.map(|s| s.path().unwrap().to_string()) // TODO: bubble this up
.collect();
Ok(iter)
}
}
impl GitRepository {
pub fn open(path: &Path) -> Result<Box<Self>, Error> {
let repo = git2::Repository::open(path)?;
Ok(Box::new(Self {
repo,
machine_id: machine_uid::get()?,
}))
}
fn checkout_ref(&self, ref_name: &str) -> Result<(), Error> {
let ref_val = self.repo.find_reference(ref_name)?;
let commit = self.repo.reference_to_annotated_commit(&ref_val)?;
let tree = self.repo.find_object(commit.id(), None)?;
self.repo.checkout_tree(&tree, None)?;
Ok(())
}
fn stash_name(&mut self, profile_name: &str) -> String {
format!("cargo-vcs_{}_{}", self.machine_id, profile_name)
}
fn match_tag(&self) -> Result<String, Error> {
let head_ref = self.repo.head()?;
let commit = head_ref.peel_to_commit()?;
let mut tag_data = Vec::new();
self.repo.tag_foreach(|oid, name_u8| {
tag_data.push((oid, Vec::from(name_u8)));
true
})?;
for raw in tag_data {
let oid = raw.0;
let name = std::str::from_utf8(&raw.1)
.map_err(|_| Error::project_error("Invalid UTF-8 in tag name"))?;
if let Ok(tag) = self.repo.find_tag(oid) {
let peeled = tag.peel()?;
if peeled.id() == commit.id() {
return Ok(name.into());
}
}
}
Err(Error::project_error("Tag not found"))
}
}
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