reduce msrv back to 1.85

src/machine/streams/compat.rs

@@ -0,0 +1,70 @@
+#[cfg(rust_version = "1.87.0")]
+pub use ge_1_87_0::{PipeReader, PipeWriter};
+
+#[cfg(not(rust_version = "1.87.0"))]
+pub use lt_1_87_0::{PipeReader, PipeWriter};
+
+#[cfg(not(rust_version = "1.87.0"))]
+pub(crate) use lt_1_87_0::PipeReaderInner;
+
+#[cfg(not(rust_version = "1.87.0"))]
+mod lt_1_87_0 {
+    use std::process::{ChildStderr, ChildStdout};
+
+    pub type PipeWriter = std::process::ChildStdin;
+
+    #[derive(Debug)]
+    pub struct PipeReader(pub(crate) PipeReaderInner);
+
+    #[derive(Debug)]
+    pub(crate) enum PipeReaderInner {
+        Stdout(ChildStdout),
+        Stderr(ChildStderr),
+    }
+
+    impl std::io::Read for PipeReader {
+        fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
+            match &mut self.0 {
+                PipeReaderInner::Stdout(child_stdout) => child_stdout.read(buf),
+                PipeReaderInner::Stderr(child_stderr) => child_stderr.read(buf),
+            }
+        }
+
+        fn read_vectored(
+            &mut self,
+            bufs: &mut [std::io::IoSliceMut<'_>],
+        ) -> std::io::Result<usize> {
+            match &mut self.0 {
+                PipeReaderInner::Stdout(child_stdout) => child_stdout.read_vectored(bufs),
+                PipeReaderInner::Stderr(child_stderr) => child_stderr.read_vectored(bufs),
+            }
+        }
+
+        fn read_to_end(&mut self, buf: &mut Vec<u8>) -> std::io::Result<usize> {
+            match &mut self.0 {
+                PipeReaderInner::Stdout(child_stdout) => child_stdout.read_to_end(buf),
+                PipeReaderInner::Stderr(child_stderr) => child_stderr.read_to_end(buf),
+            }
+        }
+
+        fn read_to_string(&mut self, buf: &mut String) -> std::io::Result<usize> {
+            match &mut self.0 {
+                PipeReaderInner::Stdout(child_stdout) => child_stdout.read_to_string(buf),
+                PipeReaderInner::Stderr(child_stderr) => child_stderr.read_to_string(buf),
+            }
+        }
+
+        fn read_exact(&mut self, buf: &mut [u8]) -> std::io::Result<()> {
+            match &mut self.0 {
+                PipeReaderInner::Stdout(child_stdout) => child_stdout.read_exact(buf),
+                PipeReaderInner::Stderr(child_stderr) => child_stderr.read_exact(buf),
+            }
+        }
+    }
+}
+
+#[cfg(rust_version = "1.87.0")]
+mod ge_1_87_0 {
+    pub type PipeReader = std::io::PipeReader;
+    pub type PipeWriter = std::io::PipeWriter;
+}