notohh/rustlings
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Improve initialization in a Cargo workspace

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This commit is contained in:
mo8it 2024-08-09 00:49:30 +02:00
parent 337460d299
commit 140c4e4812
1 changed files with 55 additions and 22 deletions
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77
src/init.rs
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@ -1,5 +1,6 @@
use anyhow::{bail, Context, Result};
use ratatui::crossterm::style::Stylize;
use serde::Deserialize;
use std::{
env::set_current_dir,
fs::{self, create_dir},
@ -13,36 +14,68 @@ use crate::{
term::press_enter_prompt,
};
#[derive(Deserialize)]
struct CargoLocateProject {
root: PathBuf,
}
pub fn init() -> Result<()> {
let rustlings_dir = Path::new("rustlings");
if rustlings_dir.exists() {
bail!(RUSTLINGS_DIR_ALREADY_EXISTS_ERR);
}
let locate_project_output = Command::new("cargo")
.arg("locate-project")
.arg("-q")
.arg("--workspace")
.stdin(Stdio::null())
.stderr(Stdio::inherit())
.output()
.context(CARGO_LOCATE_PROJECT_ERR)?;
let mut stdout = io::stdout().lock();
let mut init_git = true;
let manifest_path = Command::new("cargo")
.args(["locate-project", "--message-format=plain"])
.output()?;
if manifest_path.status.success() {
let manifest_path: PathBuf = String::from_utf8_lossy(&manifest_path.stdout).trim().into();
if locate_project_output.status.success() {
if Path::new("exercises").exists() && Path::new("solutions").exists() {
bail!(IN_INITIALIZED_DIR_ERR);
}
if fs::read_to_string(manifest_path)?.contains("[workspace]") {
// make sure "rustlings" is added to `workspace.members` by making
// cargo initialize a new project
let output = Command::new("cargo").args(["new", "rustlings"]).output()?;
if !output.status.success() {
bail!("Failed to initilize new workspace member");
}
fs::remove_dir_all("rustlings")?;
init_git = false;
} else {
bail!(IN_NON_WORKSPACE_CARGO_PROJECT_ERR);
let workspace_manifest =
serde_json::de::from_slice::<CargoLocateProject>(&locate_project_output.stdout)
.context(
"Failed to read the field `root` from the output of `cargo locate-project …`",
)?
.root;
let workspace_manifest_content = fs::read_to_string(&workspace_manifest)
.with_context(|| format!("Failed to read the file {}", workspace_manifest.display()))?;
if !workspace_manifest_content.contains("[workspace]\n")
&& !workspace_manifest_content.contains("workspace.")
{
bail!("The current directory is already part of a Cargo project.\nPlease initialize Rustlings in a different directory");
}
// Make sure "rustlings" is added to `workspace.members` by making
// Cargo initialize a new project.
let status = Command::new("cargo")
.arg("new")
.arg("-q")
.arg("--vcs")
.arg("none")
.arg("rustlings")
.stdin(Stdio::null())
.stdout(Stdio::null())
.status()?;
if !status.success() {
bail!("Failed to initilize a new Cargo workspace member.\nPlease initialize Rustlings in a different directory");
}
stdout.write_all(b"The directory `rustlings` has been added to `workspace.members` in the Cargo.toml file of this Cargo workspace.\n")?;
fs::remove_dir_all("rustlings")
.context("Failed to remove the temporary directory `rustlings/`")?;
init_git = false;
}
stdout.write_all(b"This command will create the directory `rustlings/` which will contain the exercises.\nPress ENTER to continue ")?;
@ -117,6 +150,10 @@ pub fn init() -> Result<()> {
Ok(())
}
const CARGO_LOCATE_PROJECT_ERR: &str = "Failed to run the command `cargo locate-project …`
Did you already install Rust?
Try running `cargo --version` to diagnose the problem.";
const INIT_SOLUTION_FILE: &[u8] = b"fn main() {
// DON'T EDIT THIS SOLUTION FILE!
// It will be automatically filled after you finish the exercise.
@ -133,7 +170,7 @@ pub const VS_CODE_EXTENSIONS_JSON: &[u8] = br#"{"recommendations":["rust-lang.ru
const IN_INITIALIZED_DIR_ERR: &str = "It looks like Rustlings is already initialized in this directory.
If you already initialized Rustlings, run the command `rustlings` for instructions on getting started with the exercises.
Otherwise, please run `rustlings init` again in another directory.";
Otherwise, please run `rustlings init` again in a different directory.";
const RUSTLINGS_DIR_ALREADY_EXISTS_ERR: &str =
"A directory with the name `rustlings` already exists in the current directory.
@ -141,9 +178,5 @@ You probably already initialized Rustlings.
Run `cd rustlings`
Then run `rustlings` again";
const IN_NON_WORKSPACE_CARGO_PROJECT_ERR: &str = "\
The current directory is already part of a cargo project.
Please initialize rustlings in a different directory.";
const POST_INIT_MSG: &str = "Run `cd rustlings` to go into the generated directory.
Then run `rustlings` to get started.";