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use anyhow::Result;
use serde::Deserialize;
use std::process::{Command, Stdio};
pub struct Package {
pub name: String,
bin: Option<String>,
}
#[derive(Deserialize, Debug)]
struct PackageJson {
name: String,
version: String,
main: Option<String>,
types: Option<String>,
}
impl Package {
pub fn new(name: &str, bin: Option<&str>) -> Package {
Package {
name: name.to_string(),
bin: match bin {
Some(s) => Some(s.to_string()),
None => None,
},
}
}
pub fn install(&self) -> Result<()> {
let npm = Package {
name: "npm".to_string(),
bin: Some("npm".to_string()),
};
if npm.installed().is_err() {
return Err(anyhow::format_err!("NPM is not installed"));
}
match npm.execute(&format!("npm install {} --save", &self.name)) {
Ok(_) => Ok(()),
Err(e) => Err(e),
}
}
pub fn installed(&self) -> Result<()> {
match self.version() {
Ok(_) => Ok(()),
Err(e) => Err(e),
}
}
pub fn execute(&self, arg: &str) -> Result<()> {
let mut output = self
.program()
.arg("-c")
.arg(arg)
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.spawn()?;
match output.wait() {
Ok(_e) => Ok(()),
Err(e) => Err(e.into()),
}
}
pub fn execute_output(&self, arg: &str) -> Result<String> {
let output = self
.program()
.arg("-c")
.arg(arg)
.stderr(Stdio::inherit())
.output()?;
Ok(std::str::from_utf8(&output.stdout)?.trim().to_string())
}
pub fn version(&self) -> Result<String> {
let version = match self.name.as_str() {
"npm" | "npx" => {
let arg = [&self.bin.as_ref().unwrap().to_string(), "-v"].join(" ");
match self.execute_output(&arg) {
Ok(s) => {
if s.len() > 0 {
Ok(s)
} else {
Err(anyhow::format_err!("No output from version check -v"))
}
}
Err(e) => Err(e),
}
}
_ => match self.package_json() {
Ok(x) => {
println!("Checking version {} -> {}", x.name, x.version);
Ok(x.version)
}
Err(e) => Err(e),
},
}?;
Ok(version)
}
fn package_json(&self) -> Result<PackageJson> {
let file = std::fs::File::open(format!("./node_modules/{}/package.json", self.name))?;
let reader = std::io::BufReader::new(file);
let json = serde_json::from_reader(reader)?;
Ok(json)
}
fn program(&self) -> Command {
if cfg!(target_os = "windows") {
Command::new("cmd")
} else {
Command::new("sh")
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn get_version() {
let npm = Package::new("npm", Some("npm"));
let version = npm.version().unwrap();
assert!(version.len() > 1);
}
#[test]
fn get_uninstalled_package() {
let x = Package::new("test", Some("test"));
assert!(x.version().is_err());
}
#[test]
fn install_package() {
let buidler = Package::new("@nomiclabs/buidler", Some("buidler"));
match buidler.installed() {
Ok(_) => println!("Allready insatlled buidler"),
Err(_) => buidler.install().expect("Buidler did not install"),
};
assert!(buidler.installed().is_ok());
}
}