refactor: Return failure::Error instead of wasm_pack::error::Error

src/build.rs

@@ -12,7 +12,7 @@ use std::str;
 use PBAR;
 
 /// Ensure that `rustc` is present and that it is >= 1.30.0
-pub fn check_rustc_version(step: &Step) -> Result<String, Error> {
+pub fn check_rustc_version(step: &Step) -> Result<String, failure::Error> {
     let msg = format!("{}Checking `rustc` version...", emoji::CRAB);
     PBAR.step(step, &msg);
     let local_minor_version = rustc_minor_version();
@@ -25,14 +25,14 @@ pub fn check_rustc_version(step: &Step) -> Result<String, Error> {
                   mv.to_string()
                 ),
                 local_minor_version: mv.to_string(),
-              })
+              }.into())
             } else {
               Ok(mv.to_string())
             }
       },
       None => Err(Error::RustcMissing {
         message: "We can't figure out what your Rust version is- which means you might not have Rust installed. Please install Rust version 1.30.0 or higher.".to_string(),
-      }),
+      }.into()),
     }
 }
 

src/command/utils.rs

@@ -1,7 +1,7 @@
 //! Utility functions for commands.
 
 use emoji;
-use error::Error;
+use failure;
 use progressbar::Step;
 use std::fs;
 use std::io;
@@ -20,7 +20,7 @@ pub fn set_crate_path(path: Option<PathBuf>) -> io::Result<PathBuf> {
 }
 
 /// Construct our `pkg` directory in the crate.
-pub fn create_pkg_dir(out_dir: &Path, step: &Step) -> Result<(), Error> {
+pub fn create_pkg_dir(out_dir: &Path, step: &Step) -> Result<(), failure::Error> {
     let msg = format!("{}Creating a pkg directory...", emoji::FOLDER);
     PBAR.step(step, &msg);
     fs::create_dir_all(&out_dir)?;

src/lockfile.rs

@@ -23,10 +23,10 @@ struct Package {
 
 impl Lockfile {
     /// Read the `Cargo.lock` file for the crate at the given path.
-    pub fn new(crate_path: &Path) -> Result<Lockfile, Error> {
+    pub fn new(crate_path: &Path) -> Result<Lockfile, failure::Error> {
         let lock_path = get_lockfile_path(crate_path)?;
         let lockfile = fs::read_to_string(lock_path)?;
-        toml::from_str(&lockfile).map_err(Error::from)
+        toml::from_str(&lockfile).map_err(|err| Error::from(err).into())
     }
 
     /// Get the version of `wasm-bindgen` dependency used in the `Cargo.lock`.
@@ -36,7 +36,7 @@ impl Lockfile {
 
     /// Like `wasm_bindgen_version`, except it returns an error instead of
     /// `None`.
-    pub fn require_wasm_bindgen(&self) -> Result<&str, Error> {
+    pub fn require_wasm_bindgen(&self) -> Result<&str, failure::Error> {
         self.wasm_bindgen_version().ok_or_else(|| {
             let message = format!(
                 "Ensure that you have \"{}\" as a dependency in your Cargo.toml file:\n\
@@ -44,7 +44,7 @@ impl Lockfile {
                  wasm-bindgen = \"0.2\"",
                 style("wasm-bindgen").bold().dim(),
             );
-            Error::CrateConfig { message }
+            Error::CrateConfig { message }.into()
         })
     }
 
@@ -63,21 +63,20 @@ impl Lockfile {
 
 /// Given the path to the crate that we are buliding, return a `PathBuf`
 /// containing the location of the lock file, by finding the workspace root.
-fn get_lockfile_path(crate_path: &Path) -> Result<PathBuf, Error> {
+fn get_lockfile_path(crate_path: &Path) -> Result<PathBuf, failure::Error> {
     // Identify the crate's root directory, or return an error.
     let manifest = crate_path.join("Cargo.toml");
     let crate_root = cargo_metadata::metadata(Some(&manifest))
         .map_err(|_| Error::CrateConfig {
             message: String::from("Error while processing crate metadata"),
-        })?
-        .workspace_root;
+        })?.workspace_root;
     // Check that a lock file can be found in the directory. Return an error
     // if it cannot, otherwise return the path buffer.
     let lockfile_path = Path::new(&crate_root).join("Cargo.lock");
     if !lockfile_path.is_file() {
         Err(Error::CrateConfig {
             message: format!("Could not find lockfile at {:?}", lockfile_path),
-        })
+        }.into())
     } else {
         Ok(lockfile_path)
     }

src/logger.rs

@@ -1,7 +1,7 @@
 //! Logging facilities for `wasm-pack`.
 
 use command::Command;
-use error::Error;
+use failure;
 use slog::{Drain, Level, Logger};
 use slog_async::Async;
 use slog_term::{FullFormat, PlainDecorator};
@@ -9,7 +9,7 @@ use std::fs::OpenOptions;
 use std::path::PathBuf;
 
 /// Create the logger for wasm-pack that will output any info warning or errors we encounter
-pub fn new(cmd: &Command, verbosity: u8) -> Result<Logger, Error> {
+pub fn new(cmd: &Command, verbosity: u8) -> Result<Logger, failure::Error> {
     let log_path = log_file_path(&cmd);
     let file = OpenOptions::new()
         .create(true)

src/manifest/mod.rs

@@ -11,6 +11,7 @@ use self::npm::{
     repository::Repository, CommonJSPackage, ESModulesPackage, NoModulesPackage, NpmPackage,
 };
 use emoji;
+use failure;
 use error::Error;
 use progressbar::Step;
 use serde_json;
@@ -75,13 +76,13 @@ struct CargoLib {
     crate_type: Option<Vec<String>>,
 }
 
-fn read_cargo_toml(path: &Path) -> Result<CargoManifest, Error> {
+fn read_cargo_toml(path: &Path) -> Result<CargoManifest, failure::Error> {
     let manifest_path = path.join("Cargo.toml");
     if !manifest_path.is_file() {
         return Err(Error::crate_config(&format!(
             "Crate directory is missing a `Cargo.toml` file; is `{}` the wrong directory?",
             path.display()
-        )));
+        )).into());
     }
     let mut cargo_file = File::open(manifest_path)?;
     let mut cargo_contents = String::new();
@@ -213,7 +214,7 @@ pub fn write_package_json(
     disable_dts: bool,
     target: &str,
     step: &Step,
-) -> Result<(), Error> {
+) -> Result<(), failure::Error> {
     let msg = format!("{}Writing a package.json...", emoji::MEMO);
 
     PBAR.step(step, &msg);
@@ -234,19 +235,19 @@ pub fn write_package_json(
 }
 
 /// Get the crate name for the crate at the given path.
-pub fn get_crate_name(path: &Path) -> Result<String, Error> {
+pub fn get_crate_name(path: &Path) -> Result<String, failure::Error> {
     Ok(read_cargo_toml(path)?.package.name)
 }
 
 /// Check that the crate the given path is properly configured.
-pub fn check_crate_config(path: &Path, step: &Step) -> Result<(), Error> {
+pub fn check_crate_config(path: &Path, step: &Step) -> Result<(), failure::Error> {
     let msg = format!("{}Checking crate configuration...", emoji::WRENCH);
     PBAR.step(&step, &msg);
     check_crate_type(path)?;
     Ok(())
 }
 
-fn check_crate_type(path: &Path) -> Result<(), Error> {
+fn check_crate_type(path: &Path) -> Result<(), failure::Error> {
     if read_cargo_toml(path)?.lib.map_or(false, |lib| {
         lib.crate_type
             .map_or(false, |types| types.iter().any(|s| s == "cdylib"))
@@ -258,5 +259,5 @@ fn check_crate_type(path: &Path) -> Result<(), Error> {
        Cargo.toml file:\n\n\
        [lib]\n\
        crate-type = [\"cdylib\", \"rlib\"]"
-    ))
+    ).into())
 }

src/readme.rs

@@ -1,7 +1,7 @@
 //! Generating `README` files for the packaged wasm.
 
-use error::Error;
 use std::fs;
+use failure;
 use std::path::Path;
 
 use emoji;
@@ -9,7 +9,7 @@ use progressbar::Step;
 use PBAR;
 
 /// Copy the crate's README into the `pkg` directory.
-pub fn copy_from_crate(path: &Path, out_dir: &Path, step: &Step) -> Result<(), Error> {
+pub fn copy_from_crate(path: &Path, out_dir: &Path, step: &Step) -> Result<(), failure::Error> {
     assert!(
         fs::metadata(path).ok().map_or(false, |m| m.is_dir()),
         "crate directory should exist"