Use short SHA in start message

Cargo.lock

@@ -365,9 +365,9 @@ checksum = "b4ae4235e6dac0694637c763029ecea1a2ec9e4e06ec2729bd21ba4d9c863eb7"
 
 [[package]]
 name = "bumpalo"
-version = "3.6.1"
+version = "3.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63396b8a4b9de3f4fdfb320ab6080762242f66a8ef174c49d8e19b674db4cdbe"
+checksum = "9c59e7af012c713f529e7a3ee57ce9b31ddd858d4b512923602f74608b009631"
 
 [[package]]
 name = "byteorder"
@@ -531,9 +531,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f6cb3c7f5b8e51bc3ebb73a2327ad4abdbd119dc13223f14f961d2f38486756"
+checksum = "9b10ddc024425c88c2ad148c1b0fd53f4c6d38db9697c9f1588381212fa657c9"
 dependencies = [
  "cfg-if",
  "crossbeam-utils",
@@ -541,11 +541,10 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4feb231f0d4d6af81aed15928e58ecf5816aa62a2393e2c82f46973e92a9a278"
+checksum = "d82cfc11ce7f2c3faef78d8a684447b40d503d9681acebed6cb728d45940c4db"
 dependencies = [
- "autocfg",
  "cfg-if",
  "lazy_static",
 ]
@@ -856,9 +855,9 @@ dependencies = [
 
 [[package]]
 name = "heck"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
 dependencies = [
  "unicode-segmentation",
 ]
@@ -1797,9 +1796,9 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16f1d0fef1604ba8f7a073c7e701f213e056707210e9020af4528e0101ce11a6"
+checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
 dependencies = [
  "libc",
 ]
@@ -2182,9 +2181,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd3076b5c8cc18138b8f8814895c11eb4de37114a5d127bafdc5e55798ceef37"
+checksum = "0a38d31d7831c6ed7aad00aa4c12d9375fd225a6dd77da1d25b707346319a975"
 dependencies = [
  "autocfg",
  "bytes",
@@ -2303,9 +2302,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.17"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07fbfce1c8a97d547e8b5334978438d9d6ec8c20e38f56d4a4374d181493eaef"
+checksum = "d54590932941a9e9266f0832deed84ebe1bf2e4c9e4a3554d393d18f5e854bf9"
 dependencies = [
  "tinyvec",
 ]

build.rs

@@ -1,8 +1,10 @@
 use std::error::Error;
 
-use vergen::{vergen, Config};
+use vergen::{vergen, Config, ShaKind};
 
 fn main() -> Result<(), Box<dyn Error>> {
-    vergen(Config::default())?;
+    let mut config = Config::default();
+    *config.git_mut().sha_kind_mut() = ShaKind::Short;
+    vergen(config)?;
     Ok(())
 }

src/cache/fs.rs

@@ -397,7 +397,9 @@ impl AsyncWrite for EncryptedDiskWriter {
         mut self: Pin<&mut Self>,
         cx: &mut Context<'_>,
     ) -> Poll<Result<(), std::io::Error>> {
-        if !self.as_ref().write_buffer.is_empty() {
+        if self.as_ref().write_buffer.is_empty() {
+            self.file.as_mut().poll_flush(cx)
+        } else {
             let new_self = Pin::into_inner(self);
             let buffer = new_self.write_buffer.as_ref();
             match new_self.file.as_mut().poll_write(cx, buffer) {
@@ -412,8 +414,6 @@ impl AsyncWrite for EncryptedDiskWriter {
                 }
                 Poll::Pending => Poll::Pending,
             }
-        } else {
-            self.file.as_mut().poll_flush(cx)
         }
     }
 

src/main.rs

@@ -244,7 +244,7 @@ fn print_preamble_and_warnings(args: &CliArgs) -> Result<(), Box<dyn Error>> {
         " ",
         env!("CARGO_PKG_VERSION"),
         " (",
-        env!("VERGEN_GIT_SHA"),
+        env!("VERGEN_GIT_SHA_SHORT"),
         ")",
         "  Copyright (C) 2021  ",
         env!("CARGO_PKG_AUTHORS"),