fix(windows): add windows support

.github/workflows/rust.yml

@@ -12,6 +12,9 @@ jobs:
         os: [ubuntu-latest, windows-latest]
 
     steps:
+    - uses: hecrj/setup-rust-action@master
+      with:
+        rust-version: ${{ matrix.rust }}
     - uses: actions/checkout@v1
     - name: Components
       run: rustup component add clippy

Cargo.toml

@@ -27,13 +27,15 @@ digest = "0.8.0"
 serde_json = "1.0.39"
 serde = "1.0.92"
 serde_derive = "1.0.92"
-nix = "0.14.0"
-chownr = "2.0.0"
 failure = "0.1.5"
 walkdir = "2.2.7"
 either = "1.5.2"
 mkdirp = "1.0.0"
 
+[target.'cfg(unix)'.dependencies]
+chownr = "2.0.0"
+nix = "0.14.0"
+
 [dev-dependencies]
 criterion = "0.2.11"
 

src/content/path.rs

@@ -22,7 +22,7 @@ pub fn content_path(cache: &Path, sri: &Integrity) -> PathBuf {
 
 #[cfg(test)]
 mod tests {
-    use super::content_path;
+    use super::*;
     use ssri::Integrity;
     use std::path::Path;
 
@@ -30,9 +30,16 @@ mod tests {
     fn basic_test() {
         let sri = Integrity::from(b"hello world");
         let cpath = content_path(Path::new("~/.my-cache"), &sri);
+        let mut wanted = PathBuf::new();
+        wanted.push("~/.my-cache");
+        wanted.push(format!("content-v{}", CONTENT_VERSION));
+        wanted.push("sha256");
+        wanted.push("b9");
+        wanted.push("4d");
+        wanted.push("27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9");
         assert_eq!(
             cpath.to_str().unwrap(),
-            "~/.my-cache/content-v2/sha256/b9/4d/27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
+            wanted.to_str().unwrap()
         );
     }
 }

src/errors.rs

@@ -1,5 +1,6 @@
 use std::io;
 
+#[cfg(unix)]
 use chownr;
 use failure::Fail;
 use serde_json;
@@ -24,6 +25,7 @@ pub enum Error {
     Io(#[fail(cause)] io::Error),
     /// Returned when there's an error with changing uid/gid on an entry.
     #[fail(display = "{}", _0)]
+    #[cfg(unix)]
     Chownr(#[fail(cause)] chownr::Error),
     /// Returned when there's an issue with metadata (de)serialization.
     #[fail(display = "{}", _0)]
@@ -44,6 +46,7 @@ impl From<std::io::Error> for Error {
     }
 }
 
+#[cfg(unix)]
 impl From<chownr::Error> for Error {
     fn from(error: chownr::Error) -> Self {
         Error::Chownr(error)

src/index.rs

@@ -5,6 +5,7 @@ use std::io::{ErrorKind, Write};
 use std::path::{Path, PathBuf};
 use std::time::{SystemTime, UNIX_EPOCH};
 
+#[cfg(unix)]
 use chownr;
 use digest::Digest;
 use either::{Left, Right};
@@ -62,9 +63,14 @@ impl Hash for SerializableEntry {
 
 pub fn insert(cache: &Path, key: &str, opts: PutOpts) -> Result<Integrity, Error> {
     let bucket = bucket_path(&cache, &key);
-    if let Some(path) = mkdirp::mkdirp(bucket.parent().unwrap())? {
+    #[cfg(unix)]
-        chownr::chownr(&path, opts.uid, opts.gid)?;
+    {
+        if let Some(path) = mkdirp::mkdirp(bucket.parent().unwrap())? {
+            chownr::chownr(&path, opts.uid, opts.gid)?;
+        }
     }
+    #[cfg(windows)]
+    mkdirp::mkdirp(bucket.parent().unwrap())?;
     let stringified = serde_json::to_string(&SerializableEntry {
         key: key.to_owned(),
         integrity: opts.sri.clone().map(|x| x.to_string()),
@@ -76,6 +82,7 @@ pub fn insert(cache: &Path, key: &str, opts: PutOpts) -> Result<Integrity, Error
     let mut buck = OpenOptions::new().create(true).append(true).open(&bucket)?;
 
     write!(buck, "\n{}\t{}", hash_entry(&stringified), stringified)?;
+    #[cfg(unix)]
     chownr::chownr(&bucket, opts.uid, opts.gid)?;
     Ok(opts
         .sri
@@ -120,7 +127,9 @@ pub fn delete(cache: &Path, key: &str) -> Result<(), Error> {
             sri: None,
             time: None,
             metadata: None,
+            #[cfg(unix)]
             uid: None,
+            #[cfg(unix)]
             gid: None,
         },
     )

src/put.rs

@@ -2,6 +2,7 @@
 use std::io::prelude::*;
 use std::path::{Path, PathBuf};
 
+#[cfg(unix)]
 use nix::unistd::{Gid, Uid};
 use serde_json::Value;
 use ssri::{Algorithm, Integrity};
@@ -32,7 +33,9 @@ pub struct PutOpts {
     pub(crate) size: Option<usize>,
     pub(crate) time: Option<u128>,
     pub(crate) metadata: Option<Value>,
+    #[cfg(unix)]
     pub(crate) uid: Option<Uid>,
+    #[cfg(unix)]
     pub(crate) gid: Option<Gid>,
 }
 
@@ -97,6 +100,7 @@ impl PutOpts {
 
     /// Configures the uid and gid to write data as. Useful when dropping
     /// privileges while in `sudo` mode.
+    #[cfg(unix)]
     pub fn chown(mut self, uid: Option<Uid>, gid: Option<Gid>) -> Self {
         self.uid = uid;
         self.gid = gid;