Implement git pulling with Tokio (#408)

Cargo.lock

@@ -39,6 +39,12 @@ version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7825f6833612eb2414095684fcf6c635becf3ce97fe48cf6421321e93bfbd53c"
 
+[[package]]
+name = "arc-swap"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b585a98a234c46fc563103e9278c9391fde1f4e6850334da895d27edb9580f62"
+
 [[package]]
 name = "arrayref"
 version = "0.3.6"
@@ -488,6 +494,21 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
 
+[[package]]
+name = "futures"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c329ae8753502fb44ae4fc2b622fa2a94652c41e795143765ba0927f92ab780"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-io",
+ "futures-sink",
+ "futures-task",
+ "futures-util",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.4"
@@ -495,6 +516,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0c77d04ce8edd9cb903932b608268b3fffec4163dc053b3b402bf47eac1f1a8"
 dependencies = [
  "futures-core",
+ "futures-sink",
 ]
 
 [[package]]
@@ -503,6 +525,17 @@ version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f25592f769825e89b92358db00d26f965761e094951ac44d3663ef25b7ac464a"
 
+[[package]]
+name = "futures-executor"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f674f3e1bcb15b37284a90cedf55afdba482ab061c407a9c0ebbd0f3109741ba"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "futures-util",
+]
+
 [[package]]
 name = "futures-io"
 version = "0.3.4"
@@ -539,9 +572,11 @@ version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22766cf25d64306bedf0384da004d05c9974ab104fcc4528f1236181c18004c5"
 dependencies = [
+ "futures-channel",
  "futures-core",
  "futures-io",
  "futures-macro",
+ "futures-sink",
  "futures-task",
  "memchr",
  "pin-utils",
@@ -895,12 +930,35 @@ dependencies = [
  "kernel32-sys",
  "libc",
  "log",
- "miow",
+ "miow 0.2.1",
  "net2",
  "slab",
  "winapi 0.2.8",
 ]
 
+[[package]]
+name = "mio-named-pipes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
+dependencies = [
+ "log",
+ "mio",
+ "miow 0.3.3",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "mio-uds"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
+dependencies = [
+ "iovec",
+ "libc",
+ "mio",
+]
+
 [[package]]
 name = "miow"
 version = "0.2.1"
@@ -913,6 +971,16 @@ dependencies = [
  "ws2_32-sys",
 ]
 
+[[package]]
+name = "miow"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "396aa0f2003d7df8395cb93e09871561ccc3e785f0acb369170e8cc74ddf9226"
+dependencies = [
+ "socket2",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.4"
@@ -1600,6 +1668,16 @@ dependencies = [
  "dirs 2.0.2",
 ]
 
+[[package]]
+name = "signal-hook-registry"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94f478ede9f64724c5d173d7bb56099ec3e2d9fc2774aac65d34b8b890405f41"
+dependencies = [
+ "arc-swap",
+ "libc",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.2"
@@ -1612,6 +1690,18 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c2fb2ec9bcd216a5b0d0ccf31ab17b5ed1d627960edff65bbe95d3ce221cefc"
 
+[[package]]
+name = "socket2"
+version = "0.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03088793f677dce356f3ccc2edb1b314ad191ab702a5de3faf49304f7e104918"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "spin"
 version = "0.5.2"
@@ -1804,11 +1894,16 @@ dependencies = [
  "fnv",
  "iovec",
  "lazy_static",
+ "libc",
  "memchr",
  "mio",
+ "mio-named-pipes",
+ "mio-uds",
  "num_cpus",
  "pin-project-lite",
+ "signal-hook-registry",
  "slab",
+ "winapi 0.3.8",
 ]
 
 [[package]]
@@ -1865,6 +1960,7 @@ dependencies = [
  "chrono",
  "console 0.9.2",
  "directories",
+ "futures",
  "glob",
  "lazy_static",
  "log",
@@ -1879,6 +1975,7 @@ dependencies = [
  "strum",
  "tempfile",
  "thiserror",
+ "tokio",
  "toml",
  "walkdir",
  "which",