add basic integration test

.travis.yml

@@ -0,0 +1,9 @@
+language: rust
+cache: cargo
+rust:
+  - stable
+  - beta
+  - nightly
+script:
+  - cargo build --verbose
+  - cargo test --test-threads=1

fixtures/hello.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello World!");
+}

src/lib.rs

@@ -0,0 +1,4 @@
+mod cargo;
+mod errors;
+pub mod opt;
+pub mod steps;

src/main.rs

@@ -1,182 +1,15 @@
 mod cargo;
 mod errors;
 mod opt;
+mod steps;
 
-use log::debug;
-use pathdiff::diff_paths;
-use std::env;
-use std::fs::File;
-use std::io::{Read, Write};
 use std::iter::Iterator;
-use std::path::{Path, PathBuf};
-use std::process::{Command, ExitStatus, Stdio};
+use std::process::{Command, Stdio};
 use std::vec::Vec;
 
-use crate::cargo::CargoManifest;
 use crate::errors::CargoPlayError;
-use crate::opt::{Opt, RustEdition};
-
-fn parse_inputs(inputs: &Vec<PathBuf>) -> Result<Vec<String>, CargoPlayError> {
-    inputs
-        .into_iter()
-        .map(File::open)
-        .map(|res| match res {
-            Ok(mut fp) => {
-                let mut buf = String::new();
-                fp.read_to_string(&mut buf)?;
-                Ok(buf)
-            }
-            Err(e) => Err(CargoPlayError::from(e)),
-        })
-        .collect()
-}
-
-fn extract_headers(files: &Vec<String>) -> Vec<String> {
-    files
-        .iter()
-        .map(|file: &String| -> Vec<String> {
-            file.lines()
-                .skip_while(|line| line.starts_with("#!") || line.is_empty())
-                .take_while(|line| line.starts_with("//#"))
-                .map(|line| line[3..].trim_start().into())
-                .filter(|s: &String| !s.is_empty())
-                .collect()
-        })
-        .flatten()
-        .collect()
-}
-
-fn temp_dir(name: PathBuf) -> PathBuf {
-    let mut temp = PathBuf::new();
-    temp.push(env::temp_dir());
-    temp.push(name);
-    temp
-}
-
-/// This function ignores the error intentionally.
-fn rmtemp(temp: &PathBuf) {
-    debug!("Cleaning temporary folder at: {:?}", temp);
-    let _ = std::fs::remove_dir_all(temp);
-}
-
-fn mktemp(temp: &PathBuf) {
-    debug!("Creating temporary building folder at: {:?}", temp);
-    if let Err(_) = std::fs::create_dir(temp) {
-        debug!("Temporary directory already exists.");
-    }
-}
-
-fn write_cargo_toml(
-    dir: &PathBuf,
-    name: String,
-    dependencies: Vec<String>,
-    edition: RustEdition,
-) -> Result<(), CargoPlayError> {
-    let manifest = CargoManifest::new(name, dependencies, edition)?;
-    let mut cargo = File::create(dir.join("Cargo.toml"))?;
-
-    cargo.write_all(&toml::to_vec(&manifest).map_err(CargoPlayError::from_serde)?)?;
-
-    Ok(())
-}
-
-/// Copy all the passed in sources to the temporary directory. The first in the list will be
-/// treated as main.rs.
-fn copy_sources(temp: &PathBuf, sources: &Vec<PathBuf>) -> Result<(), CargoPlayError> {
-    let destination = temp.join("src");
-    std::fs::create_dir_all(&destination)?;
-
-    let mut files = sources.iter();
-    let base = if let Some(first) = files.next() {
-        let dst = destination.join("main.rs");
-        debug!("Copying {:?} => {:?}", first, dst);
-        std::fs::copy(first, dst)?;
-        first.parent()
-    } else {
-        None
-    };
-
-    if let Some(base) = base {
-        files
-            .map(|file| -> Result<(), CargoPlayError> {
-                let part =
-                    diff_paths(file, base).ok_or(CargoPlayError::DiffPathError(file.to_owned()))?;
-                let dst = destination.join(part);
-
-                // ensure the parent folder all exists
-                if let Some(parent) = dst.parent() {
-                    let _ = std::fs::create_dir_all(&parent);
-                }
-
-                debug!("Copying {:?} => {:?}", file, dst);
-                std::fs::copy(file, dst).map(|_| ()).map_err(From::from)
-            })
-            .collect::<Result<Vec<_>, _>>()?;
-    }
-
-    Ok(())
-}
-
-fn run_cargo_build(
-    toolchain: Option<String>,
-    project: &PathBuf,
-    release: bool,
-    cargo_option: Option<String>,
-) -> Result<ExitStatus, CargoPlayError> {
-    let mut cargo = Command::new("cargo");
-
-    if let Some(toolchain) = toolchain {
-        cargo.arg(format!("+{}", toolchain));
-    }
-
-    cargo
-        .arg("run")
-        .arg("--manifest-path")
-        .arg(project.join("Cargo.toml"));
-
-    if let Some(cargo_option) = cargo_option {
-        // FIXME: proper escaping
-        cargo.args(cargo_option.split_ascii_whitespace());
-    }
-
-    if release {
-        cargo.arg("--release");
-    }
-
-    cargo
-        .stderr(Stdio::inherit())
-        .stdout(Stdio::inherit())
-        .status()
-        .map_err(From::from)
-}
-
-fn copy_project<T: AsRef<Path>, U: AsRef<Path>>(
-    from: T,
-    to: U,
-) -> Result<ExitStatus, CargoPlayError> {
-    let to = to.as_ref();
-
-    if to.is_dir() {
-        return Err(CargoPlayError::PathExistError(to.to_path_buf()));
-    }
-
-    Command::new("cp")
-        .arg("-R")
-        .arg(from.as_ref())
-        .arg(&to)
-        .stderr(Stdio::inherit())
-        .stdout(Stdio::inherit())
-        .status()
-        .map(|x| {
-            // At this point we are certain the `to` path exists
-            println!(
-                "Generated project at {}",
-                to.canonicalize().unwrap().display()
-            );
-            x
-        })
-        .map_err(From::from)
-}
+use crate::opt::Opt;
+use crate::steps::*;
 
 fn main() -> Result<(), CargoPlayError> {
     let args = std::env::args().collect::<Vec<_>>();
@@ -216,11 +49,11 @@ fn main() -> Result<(), CargoPlayError> {
     if opt.clean {
         rmtemp(&temp);
     }
-    dbg!(mktemp(&temp));
+    mktemp(&temp);
     write_cargo_toml(&temp, src_hash.clone(), dependencies, opt.edition)?;
     copy_sources(&temp, &opt.src)?;
 
-    let end = if let Some(save) = dbg!(opt.save) {
+    let end = if let Some(save) = opt.save {
         copy_project(&temp, &save)?
     } else {
         run_cargo_build(opt.toolchain, &temp, opt.release, opt.cargo_option)?
@@ -247,7 +80,7 @@ mod tests {
         .into_iter()
         .map(Into::into)
         .collect();
-        let result = dbg!(extract_headers(&inputs));
+        let result = extract_headers(&inputs);
 
         assert_eq!(result.len(), 2);
         assert_eq!(result[0], String::from("line 1"));

src/opt.rs

@@ -8,7 +8,7 @@ use structopt::StructOpt;
 use crate::errors::CargoPlayError;
 
 #[derive(Debug)]
-pub(crate) enum RustEdition {
+pub enum RustEdition {
     E2015,
     E2018,
 }
@@ -36,14 +36,20 @@ impl Into<String> for RustEdition {
     }
 }
 
-#[derive(Debug, StructOpt)]
+impl Default for RustEdition {
+    fn default() -> Self {
+        RustEdition::E2018
+    }
+}
+
+#[derive(Debug, StructOpt, Default)]
 #[structopt(
     name = "cargo-play",
     about = "Run your Rust program without Cargo.toml"
 )]
-pub(crate) struct Opt {
+pub struct Opt {
     #[structopt(short = "d", long = "debug", hidden = true)]
-    debug: bool,
+    pub debug: bool,
     #[structopt(short = "c", long = "clean")]
     /// Rebuild the cargo project without the cache from previous run
     pub clean: bool,

src/steps.rs

@@ -0,0 +1,175 @@
+use log::debug;
+use pathdiff::diff_paths;
+use std::env;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::iter::Iterator;
+use std::path::{Path, PathBuf};
+use std::process::{Command, ExitStatus, Stdio};
+use std::vec::Vec;
+
+use crate::cargo::CargoManifest;
+use crate::errors::CargoPlayError;
+use crate::opt::RustEdition;
+
+pub fn parse_inputs(inputs: &Vec<PathBuf>) -> Result<Vec<String>, CargoPlayError> {
+    inputs
+        .into_iter()
+        .map(File::open)
+        .map(|res| match res {
+            Ok(mut fp) => {
+                let mut buf = String::new();
+                fp.read_to_string(&mut buf)?;
+                Ok(buf)
+            }
+            Err(e) => Err(CargoPlayError::from(e)),
+        })
+        .collect()
+}
+
+pub fn extract_headers(files: &Vec<String>) -> Vec<String> {
+    files
+        .iter()
+        .map(|file: &String| -> Vec<String> {
+            file.lines()
+                .skip_while(|line| line.starts_with("#!") || line.is_empty())
+                .take_while(|line| line.starts_with("//#"))
+                .map(|line| line[3..].trim_start().into())
+                .filter(|s: &String| !s.is_empty())
+                .collect()
+        })
+        .flatten()
+        .collect()
+}
+
+pub fn temp_dir(name: PathBuf) -> PathBuf {
+    let mut temp = PathBuf::new();
+    temp.push(env::temp_dir());
+    temp.push(name);
+    temp
+}
+
+/// This function ignores the error intentionally.
+pub fn rmtemp(temp: &PathBuf) {
+    debug!("Cleaning temporary folder at: {:?}", temp);
+    let _ = std::fs::remove_dir_all(temp);
+}
+
+pub fn mktemp(temp: &PathBuf) {
+    debug!("Creating temporary building folder at: {:?}", temp);
+    if let Err(_) = std::fs::create_dir(temp) {
+        debug!("Temporary directory already exists.");
+    }
+}
+
+pub fn write_cargo_toml(
+    dir: &PathBuf,
+    name: String,
+    dependencies: Vec<String>,
+    edition: RustEdition,
+) -> Result<(), CargoPlayError> {
+    let manifest = CargoManifest::new(name, dependencies, edition)?;
+    let mut cargo = File::create(dir.join("Cargo.toml"))?;
+
+    cargo.write_all(&toml::to_vec(&manifest).map_err(CargoPlayError::from_serde)?)?;
+
+    Ok(())
+}
+
+/// Copy all the passed in sources to the temporary directory. The first in the list will be
+/// treated as main.rs.
+pub fn copy_sources(temp: &PathBuf, sources: &Vec<PathBuf>) -> Result<(), CargoPlayError> {
+    let destination = temp.join("src");
+    std::fs::create_dir_all(&destination)?;
+
+    let mut files = sources.iter();
+    let base = if let Some(first) = files.next() {
+        let dst = destination.join("main.rs");
+        debug!("Copying {:?} => {:?}", first, dst);
+        std::fs::copy(first, dst)?;
+        first.parent()
+    } else {
+        None
+    };
+
+    if let Some(base) = base {
+        files
+            .map(|file| -> Result<(), CargoPlayError> {
+                let part =
+                    diff_paths(file, base).ok_or(CargoPlayError::DiffPathError(file.to_owned()))?;
+                let dst = destination.join(part);
+
+                // ensure the parent folder all exists
+                if let Some(parent) = dst.parent() {
+                    let _ = std::fs::create_dir_all(&parent);
+                }
+
+                debug!("Copying {:?} => {:?}", file, dst);
+                std::fs::copy(file, dst).map(|_| ()).map_err(From::from)
+            })
+            .collect::<Result<Vec<_>, _>>()?;
+    }
+
+    Ok(())
+}
+
+pub fn run_cargo_build(
+    toolchain: Option<String>,
+    project: &PathBuf,
+    release: bool,
+    cargo_option: Option<String>,
+) -> Result<ExitStatus, CargoPlayError> {
+    let mut cargo = Command::new("cargo");
+
+    if let Some(toolchain) = toolchain {
+        cargo.arg(format!("+{}", toolchain));
+    }
+
+    cargo
+        .arg("run")
+        .arg("--manifest-path")
+        .arg(project.join("Cargo.toml"));
+
+    if let Some(cargo_option) = cargo_option {
+        // FIXME: proper escaping
+        cargo.args(cargo_option.split_ascii_whitespace());
+    }
+
+    if release {
+        cargo.arg("--release");
+    }
+
+    cargo
+        .stderr(Stdio::inherit())
+        .stdout(Stdio::inherit())
+        .status()
+        .map_err(From::from)
+}
+
+pub fn copy_project<T: AsRef<Path>, U: AsRef<Path>>(
+    from: T,
+    to: U,
+) -> Result<ExitStatus, CargoPlayError> {
+    let to = to.as_ref();
+
+    if to.is_dir() {
+        return Err(CargoPlayError::PathExistError(to.to_path_buf()));
+    }
+
+    Command::new("cp")
+        .arg("-R")
+        .arg(from.as_ref())
+        .arg(&to)
+        .stderr(Stdio::inherit())
+        .stdout(Stdio::inherit())
+        .status()
+        .map(|x| {
+            // At this point we are certain the `to` path exists
+            println!(
+                "Generated project at {}",
+                to.canonicalize().unwrap().display()
+            );
+            x
+        })
+        .map_err(From::from)
+}

tests/integration_test.rs

@@ -0,0 +1,82 @@
+use cargo_play::opt::Opt;
+use cargo_play::steps;
+use std::env;
+use std::ffi::OsStr;
+use std::io::Result;
+use std::path::PathBuf;
+use std::process::{ExitStatus, Output, Stdio};
+
+fn cargo_play_binary_path() -> PathBuf {
+    let mut path = env::current_exe().unwrap();
+    path.pop();
+    if path.ends_with("deps") {
+        path.pop();
+    }
+    let exe = String::from("cargo-play") + env::consts::EXE_SUFFIX;
+    path.push(exe);
+    path
+}
+
+#[derive(Debug)]
+struct StringOutput {
+    pub status: ExitStatus,
+    pub stdout: String,
+    pub stderr: String,
+}
+
+impl From<std::process::Output> for StringOutput {
+    fn from(v: Output) -> Self {
+        StringOutput {
+            status: v.status,
+            stdout: String::from_utf8_lossy(&v.stdout).to_string(),
+            stderr: String::from_utf8_lossy(&v.stderr).to_string(),
+        }
+    }
+}
+
+fn cargo_play<I: IntoIterator<Item = S>, S: AsRef<OsStr>>(
+    args: I,
+) -> std::io::Result<StringOutput> {
+    let mut play = std::process::Command::new(cargo_play_binary_path());
+    play.args(args)
+        .stderr(Stdio::piped())
+        .stdout(Stdio::piped())
+        .output()
+        .map(From::from)
+}
+
+#[test]
+fn basic_compile() -> Result<()> {
+    let output = cargo_play(&["-c", "fixtures/hello.rs"])?;
+
+    assert_eq!(output.status.code().unwrap(), 0);
+    assert_eq!(output.stdout, "Hello World!\n");
+
+    Ok(())
+}
+
+#[test]
+fn clean() -> Result<()> {
+    let opt = Opt {
+        src: vec![PathBuf::from("fixtures/hello.rs").canonicalize()?],
+        ..Default::default()
+    };
+    let path = steps::temp_dir(opt.temp_dirname());
+    let canary = path.clone().join("canary");
+
+    if path.exists() {
+        std::fs::remove_dir_all(&path)?;
+    }
+
+    println!("{:?}", path);
+    let _ = dbg!(cargo_play(&["fixtures/hello.rs"])?);
+    assert!(path.exists());
+
+    std::fs::write(&canary, "I_AM_CANARY")?;
+
+    assert!(canary.exists());
+    let _ = cargo_play(&["--clean", "fixtures/hello.rs"])?;
+    assert!(!canary.exists());
+
+    Ok(())
+}