use tokio

3 files changed, 167 insertions, 111 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 700179a..634c020 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -27,6 +27,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
 name = "bitflags"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -42,6 +48,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "bytes"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b700ce4376041dcd0a327fd0097c41095743c4c8af8887265942faf1100bd040"
+
+[[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -84,154 +96,161 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88d7ed2934d741c6b37e33e3832298e8850b53fd2d2bea03873375596c7cea4e"
 
 [[package]]
-name = "futures"
-version = "0.3.14"
+name = "generic-array"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9d5813545e459ad3ca1bff9915e9ad7f1a47dc6a91b627ce321d5863b7dd253"
+checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
 dependencies = [
- "futures-channel",
- "futures-core",
- "futures-executor",
- "futures-io",
- "futures-sink",
- "futures-task",
- "futures-util",
+ "typenum",
+ "version_check",
 ]
 
 [[package]]
-name = "futures-channel"
-version = "0.3.14"
+name = "heck"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce79c6a52a299137a6013061e0cf0e688fce5d7f1bc60125f520912fdb29ec25"
+checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
 dependencies = [
- "futures-core",
- "futures-sink",
+ "unicode-segmentation",
 ]
 
 [[package]]
-name = "futures-core"
-version = "0.3.14"
+name = "hermit-abi"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "098cd1c6dda6ca01650f1a37a794245eb73181d0d4d4e955e2f3c37db7af1815"
+checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
+dependencies = [
+ "libc",
+]
 
 [[package]]
-name = "futures-executor"
-version = "0.3.14"
+name = "instant"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10f6cb7042eda00f0049b1d2080aa4b93442997ee507eb3828e8bd7577f94c9d"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
 dependencies = [
- "futures-core",
- "futures-task",
- "futures-util",
+ "cfg-if",
 ]
 
 [[package]]
-name = "futures-io"
-version = "0.3.14"
+name = "lazy_static"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "365a1a1fb30ea1c03a830fdb2158f5236833ac81fa0ad12fe35b29cddc35cb04"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
-name = "futures-macro"
-version = "0.3.14"
+name = "libc"
+version = "0.2.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "668c6733a182cd7deb4f1de7ba3bf2120823835b3bcfbeacf7d2c4a773c1bb8b"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2",
- "quote",
- "syn",
-]
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
 
 [[package]]
-name = "futures-sink"
-version = "0.3.14"
+name = "linked-hash-map"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c5629433c555de3d82861a7a4e3794a4c40040390907cfbfd7143a92a426c23"
+checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
 
 [[package]]
-name = "futures-task"
-version = "0.3.14"
+name = "lock_api"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba7aa51095076f3ba6d9a1f702f74bd05ec65f555d70d2033d55ba8d69f581bc"
+checksum = "5a3c91c24eae6777794bb1997ad98bbb87daf92890acab859f7eaa4320333176"
+dependencies = [
+ "scopeguard",
+]
 
 [[package]]
-name = "futures-util"
-version = "0.3.14"
+name = "log"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c144ad54d60f23927f0a6b6d816e4271278b64f005ad65e4e35291d2de9c025"
+checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "futures-channel",
- "futures-core",
- "futures-io",
- "futures-macro",
- "futures-sink",
- "futures-task",
- "memchr",
- "pin-project-lite",
- "pin-utils",
- "proc-macro-hack",
- "proc-macro-nested",
- "slab",
+ "cfg-if",
 ]
 
 [[package]]
-name = "generic-array"
-version = "0.14.4"
+name = "memchr"
+version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+
+[[package]]
+name = "mio"
+version = "0.7.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf80d3e903b34e0bd7282b218398aec54e082c840d9baf8339e0080a0c542956"
 dependencies = [
- "typenum",
- "version_check",
+ "libc",
+ "log",
+ "miow",
+ "ntapi",
+ "winapi",
 ]
 
 [[package]]
-name = "heck"
-version = "0.3.2"
+name = "miow"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
+checksum = "b9f1c5b025cda876f66ef43a113f91ebc9f4ccef34843000e0adf6ebbab84e21"
 dependencies = [
- "unicode-segmentation",
+ "winapi",
 ]
 
 [[package]]
-name = "hermit-abi"
-version = "0.1.18"
+name = "ntapi"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
+checksum = "3f6bb902e437b6d86e03cce10a7e2af662292c5dfef23b65899ea3ac9354ad44"
 dependencies = [
- "libc",
+ "winapi",
 ]
 
 [[package]]
-name = "lazy_static"
-version = "1.4.0"
+name = "num_cpus"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
 
 [[package]]
-name = "libc"
-version = "0.2.86"
+name = "once_cell"
+version = "1.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
 
 [[package]]
-name = "linked-hash-map"
-version = "0.5.4"
+name = "opaque-debug"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
-name = "memchr"
-version = "2.3.4"
+name = "parking_lot"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
+dependencies = [
+ "instant",
+ "lock_api",
+ "parking_lot_core",
+]
 
 [[package]]
-name = "opaque-debug"
-version = "0.3.0"
+name = "parking_lot_core"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+checksum = "fa7a782938e745763fe6907fc6ba86946d72f49fe7e21de074e08128a99fb018"
+dependencies = [
+ "cfg-if",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "winapi",
+]
 
 [[package]]
 name = "pin-project-lite"
@@ -240,12 +259,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc0e1f259c92177c30a4c9d177246edd0a3568b25756a977d0632cf8fa37e905"
 
 [[package]]
-name = "pin-utils"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
-
-[[package]]
 name = "proc-macro-error"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -270,18 +283,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "proc-macro-hack"
-version = "0.5.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
-
-[[package]]
-name = "proc-macro-nested"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
-
-[[package]]
 name = "proc-macro2"
 version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -300,6 +301,21 @@ dependencies = [
 ]
 
 [[package]]
+name = "redox_syscall"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8270314b5ccceb518e7e578952f0b72b88222d02e8f77f5ecf7abbb673539041"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
 name = "serde"
 version = "1.0.123"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -345,10 +361,19 @@ dependencies = [
 ]
 
 [[package]]
-name = "slab"
-version = "0.4.3"
+name = "signal-hook-registry"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16f1d0fef1604ba8f7a073c7e701f213e056707210e9020af4528e0101ce11a6"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f173ac3d1a7e3b28003f40de0b5ce7fe2710f9b9dc3fc38664cebee46b3b6527"
+checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
 
 [[package]]
 name = "strsim"
@@ -386,11 +411,11 @@ version = "0.26.0"
 dependencies = [
  "anyhow",
  "digest",
- "futures",
  "serde",
  "serde_yaml",
  "sha2",
  "structopt",
+ "tokio",
  "unix_mode",
 ]
 
@@ -415,6 +440,37 @@ dependencies = [
 ]
 
 [[package]]
+name = "tokio"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83f0c8e7c0addab50b663055baf787d0af7f413a46e6e7fb9559a4e4db7137a5"
+dependencies = [
+ "autocfg",
+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "once_cell",
+ "parking_lot",
+ "pin-project-lite",
+ "signal-hook-registry",
+ "tokio-macros",
+ "winapi",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
 name = "typenum"
 version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 1543125..9c92b01 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,9 +13,9 @@ edition = "2018"
 [dependencies]
 anyhow = "1"
 digest = "0.9"
-futures = "0.3"
 serde = { version = "1", features = ["derive"] }
 serde_yaml = "0.8"
 sha2 = "0.9"
 structopt = "0.3"
+tokio = { version = "1", features = ["full"] }
 unix_mode = "0.1"
diff --git a/src/bin/summain.rs b/src/bin/summain.rs
index 8526759..041d68b 100644
--- a/src/bin/summain.rs
+++ b/src/bin/summain.rs
@@ -1,15 +1,15 @@
 use anyhow::Context;
-use futures::executor::block_on;
 use std::path::{Path, PathBuf};
 use structopt::StructOpt;
 use summain::ManifestEntry;
 
-fn main() -> anyhow::Result<()> {
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
     let mut opt = Opt::from_args();
     opt.pathnames[..].sort();
 
     for filename in opt.pathnames.iter() {
-        let m = block_on(manifest(&filename))?;
+        let m = manifest(&filename).await?;
         print!("{}", serde_yaml::to_string(&m)?);
     }