Refactor codebase to support Minimum Supported Rust Version (MSRV) of 1.51.0 (#55)

.github/workflows/ci.yml

@@ -19,6 +19,7 @@ jobs:
           - { rust: stable, os: ubuntu-latest }
           - { rust: stable, os: macos-latest }
           - { rust: stable, os: windows-latest }
+          - { rust: 1.51.0, os: ubuntu-latest }
     steps:
       - uses: actions/checkout@v2
       - name: Install Rust ${{ matrix.rust }}
@@ -44,6 +45,7 @@ jobs:
           - { rust: stable, os: ubuntu-latest }
           - { rust: stable, os: macos-latest }
           # - { rust: stable, os: windows-latest }
+          - { rust: 1.51.0, os: ubuntu-latest }
     steps:
       - uses: actions/checkout@v2
       - name: Install Rust ${{ matrix.rust }}

README.md

@@ -1,6 +1,6 @@
 # distant
 
-[![Crates.io][distant_crates_img]][distant_crates_lnk] [![Docs.rs][distant_doc_img]][distant_doc_lnk] [![CI][distant_ci_img]][distant_ci_lnk]
+[![Crates.io][distant_crates_img]][distant_crates_lnk] [![Docs.rs][distant_doc_img]][distant_doc_lnk] [![CI][distant_rustc_img]][distant_rustc_lnk] [![CI][distant_ci_img]][distant_ci_lnk]
 
 [distant_crates_img]: https://img.shields.io/crates/v/distant.svg
 [distant_crates_lnk]: https://crates.io/crates/distant
@@ -8,6 +8,8 @@
 [distant_doc_lnk]: https://docs.rs/distant
 [distant_ci_img]: https://github.com/chipsenkbeil/distant/actions/workflows/ci.yml/badge.svg
 [distant_ci_lnk]: https://github.com/chipsenkbeil/distant/actions/workflows/ci.yml
+[distant_rustc_img]: https://img.shields.io/badge/distant-rustc_1.51+-lightgray.svg
+[distant_rustc_lnk]: https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html
 
 Binary to connect with a remote machine to edit files and run programs.
 

core/README.md

@@ -1,11 +1,13 @@
 # distant core
 
-[![Crates.io][distant_crates_img]][distant_crates_lnk] [![Docs.rs][distant_doc_img]][distant_doc_lnk] 
+[![Crates.io][distant_crates_img]][distant_crates_lnk] [![Docs.rs][distant_doc_img]][distant_doc_lnk] [![Rustc 1.51.0][distant_rustc_img]][distant_rustc_lnk]
 
 [distant_crates_img]: https://img.shields.io/crates/v/distant-core.svg
 [distant_crates_lnk]: https://crates.io/crates/distant-core
 [distant_doc_img]: https://docs.rs/distant-core/badge.svg
 [distant_doc_lnk]: https://docs.rs/distant-core
+[distant_rustc_img]: https://img.shields.io/badge/distant_core-rustc_1.51+-lightgray.svg
+[distant_rustc_lnk]: https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html
 
 Library that powers the [`distant`](https://github.com/chipsenkbeil/distant)
 binary.

core/src/client/lsp/data.rs

@@ -277,14 +277,19 @@ impl FromStr for LspHeader {
         let mut content_type = None;
 
         for line in lines {
-            if let Some((name, value)) = line.split_once(':') {
+            match line.find(':') {
-                match name {
+                Some(idx) if idx + 1 < line.len() => {
-                    "Content-Length" => content_length = Some(value.trim().parse()?),
+                    let name = &line[..idx];
-                    "Content-Type" => content_type = Some(value.trim().to_string()),
+                    let value = &line[(idx + 1)..];
-                    _ => return Err(LspHeaderParseError::BadHeaderField),
+                    match name {
+                        "Content-Length" => content_length = Some(value.trim().parse()?),
+                        "Content-Type" => content_type = Some(value.trim().to_string()),
+                        _ => return Err(LspHeaderParseError::BadHeaderField),
+                    }
+                }
+                _ => {
+                    return Err(LspHeaderParseError::BadHeaderField);
                 }
-            } else {
-                return Err(LspHeaderParseError::BadHeaderField);
             }
         }
 

core/src/data.rs

@@ -589,12 +589,6 @@ pub enum ErrorKind {
     /// reached prematurely
     UnexpectedEof,
 
-    /// This operation is unsupported on this platform
-    Unsupported,
-
-    /// An operation could not be completed, because it failed to allocate enough memory.
-    OutOfMemory,
-
     /// When a loop is encountered when walking a directory
     Loop,
 
@@ -629,8 +623,6 @@ impl From<io::ErrorKind> for ErrorKind {
             io::ErrorKind::Interrupted => Self::Interrupted,
             io::ErrorKind::Other => Self::Other,
             io::ErrorKind::UnexpectedEof => Self::UnexpectedEof,
-            io::ErrorKind::Unsupported => Self::Unsupported,
-            io::ErrorKind::OutOfMemory => Self::OutOfMemory,
 
             // This exists because io::ErrorKind is non_exhaustive
             _ => Self::Unknown,

core/src/net/transport/mod.rs

@@ -199,7 +199,7 @@ mod tests {
         let bytes = serde_cbor::to_vec(&data).unwrap();
         let len = (bytes.len() as u64).to_be_bytes();
         let mut frame = Vec::new();
-        frame.extend(len);
+        frame.extend(len.iter().copied());
         frame.extend(bytes);
 
         transport.send(data).await.unwrap();
@@ -232,7 +232,7 @@ mod tests {
         let bytes = serde_cbor::to_vec(&data).unwrap();
         let len = (bytes.len() as u64).to_be_bytes();
         let mut frame = Vec::new();
-        frame.extend(len);
+        frame.extend(len.iter().copied());
         frame.extend(bytes);
 
         tx.send(frame).await.unwrap();
@@ -256,7 +256,7 @@ mod tests {
         let bytes = serde_cbor::to_vec(&data).unwrap();
         let len = (bytes.len() as u64).to_be_bytes();
         let mut frame = Vec::new();
-        frame.extend(len);
+        frame.extend(len.iter().copied());
         frame.extend(bytes);
 
         tx.send(frame).await.unwrap();
@@ -293,7 +293,7 @@ mod tests {
             let bytes = serde_cbor::to_vec(&data).unwrap();
             let len = (bytes.len() as u64).to_be_bytes();
             let mut frame = Vec::new();
-            frame.extend(len);
+            frame.extend(len.iter().copied());
             frame.extend(bytes);
 
             tx.send(frame).await.unwrap();
@@ -318,7 +318,7 @@ mod tests {
             let bytes = serde_cbor::to_vec(&data).unwrap();
             let len = (bytes.len() as u64).to_be_bytes();
             let mut frame = Vec::new();
-            frame.extend(len);
+            frame.extend(len.iter().copied());
             frame.extend(bytes);
 
             tx.send(frame).await.unwrap();
@@ -344,7 +344,7 @@ mod tests {
             let bytes = serde_cbor::to_vec(&data).unwrap();
             let len = (bytes.len() as u64).to_be_bytes();
             let mut frame = Vec::new();
-            frame.extend(len);
+            frame.extend(len.iter().copied());
             frame.extend(bytes);
 
             wh.send(data).await.unwrap();

core/src/server/port.rs

@@ -64,12 +64,12 @@ impl FromStr for PortRange {
 
     /// Parses PORT into single range or PORT1:PORTN into full range
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s.split_once(':') {
+        match s.find(':') {
-            Some((start, end)) => Ok(Self {
+            Some(idx) if idx + 1 < s.len() => Ok(Self {
-                start: start.parse()?,
+                start: s[..idx].parse()?,
-                end: Some(end.parse()?),
+                end: Some(s[(idx + 1)..].parse()?),
             }),
-            None => Ok(Self {
+            _ => Ok(Self {
                 start: s.parse()?,
                 end: None,
             }),

tests/cli/action/remove.rs

@@ -215,13 +215,16 @@ fn should_support_json_output_for_error(mut action_cmd: Command) {
     assert!(
         matches!(
             res.payload[0],
+            // NOTE: After some refactoring, unknown error type shows up in
+            //       our CI but not on my local machine. I can't pin it down.
+            //       The description matches what we'd expect regarding the
+            //       directory not being empty, so for now going to support
+            //       either of these error kinds.
             ResponseData::Error(Error {
-                // NOTE: After some refactoring, unknown error type shows up in
+                kind: ErrorKind::Other,
-                //       our CI but not on my local machine. I can't pin it down.
+                ..
-                //       The description matches what we'd expect regarding the
+            }) | ResponseData::Error(Error {
-                //       directory not being empty, so for now going to support
+                kind: ErrorKind::Unknown,
-                //       either of these error kinds.
-                kind: ErrorKind::Other | ErrorKind::Unknown,
                 ..
             })
         ),