8aa18fa25234 — Floris Bruynooghe 4 years ago 
Create specific error type for BacklightDevice

This migrates away from failure for the core BacklightDevice type.
patch browse 
4 files changed, 557 insertions(+), 252 deletions(-)

M Cargo.lock
M Cargo.toml
A => src/error.rs
M src/lib.rs

M Cargo.lock +252 -212
@@ 1,672 1,712 @@ 
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
+name = "addr2line"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi",
 ]
 
 [[package]]
 name = "argon2rs"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f67b0b6a86dae6e67ff4ca2b6201396074996379fba2b92ff649126f37cb392"
 dependencies = [
- "blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2-rfc",
+ "scoped_threadpool",
 ]
 
 [[package]]
 name = "arrayvec"
 version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
 dependencies = [
- "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop",
 ]
 
 [[package]]
 name = "atty"
 version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "termion",
+ "winapi",
 ]
 
 [[package]]
 name = "autocfg"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e49efa51329a5fd37e7c79db4621af617cd4e3e5bc224939808d076077077bf"
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "backtrace"
-version = "0.3.32"
+version = "0.3.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "707b586e0e2f247cbde68cdd2c3ce69ea7b7be43e1c5b426e37c9319c4b9838e"
 dependencies = [
- "backtrace-sys 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "backtrace-sys"
-version = "0.1.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "addr2line",
+ "cfg-if 1.0.0",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
 ]
 
 [[package]]
 name = "bitflags"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
 
 [[package]]
 name = "blake2-rfc"
 version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d6d530bdd2d52966a6d03b7a964add7ae1a288d25214066fd4b600f0f796400"
 dependencies = [
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec",
+ "constant_time_eq",
 ]
 
 [[package]]
 name = "bright"
 version = "3.0.0"
 dependencies = [
- "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "dbus 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "systemd 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace",
+ "clap",
+ "ctrlc",
+ "dbus",
+ "failure",
+ "failure_derive",
+ "log",
+ "simplelog",
+ "systemd",
+ "tempfile",
 ]
 
 [[package]]
 name = "byteorder"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
 
 [[package]]
 name = "c2-chacha"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d64d04786e0f528460fc884753cf8dddcc466be308f6026f8e355c41a0e4101"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static",
+ "ppv-lite86",
 ]
 
 [[package]]
 name = "cc"
 version = "1.0.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39f75544d7bbaf57560d2168f28fd649ff9c76153874db88bdbdfd839b1a7e7d"
 
 [[package]]
 name = "cfg-if"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
 version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77d81f58b7301084de3b958691458a53c3f7e0b1d702f77e550b6a88e3a88abe"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "num-integer",
+ "num-traits",
+ "time",
 ]
 
 [[package]]
 name = "clap"
 version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
 dependencies = [
- "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
 ]
 
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags",
 ]
 
 [[package]]
 name = "constant_time_eq"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"
 
 [[package]]
 name = "cstr-argument"
 version = "0.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "514570a4b719329df37f93448a70df2baac553020d0eb43a8dfa9c1f5ba7b658"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9",
+ "memchr",
 ]
 
 [[package]]
 name = "ctrlc"
 version = "3.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7dfd2d8b4c82121dfdff120f818e09fc4380b0b7e17a742081a89b94853e87f"
 dependencies = [
- "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix",
+ "winapi",
 ]
 
 [[package]]
 name = "dbus"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e1b39f3f6aa3d4a1522c4f0f9f1e9e9167bd93740a8690874caa7cf8ce47d7"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "libdbus-sys 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "libdbus-sys",
 ]
 
 [[package]]
 name = "dirs"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_users 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "redox_users",
+ "winapi",
 ]
 
 [[package]]
 name = "failure"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 dependencies = [
- "backtrace 0.3.32 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace",
+ "failure_derive",
 ]
 
 [[package]]
 name = "failure_derive"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
 ]
 
 [[package]]
 name = "fuchsia-cprng"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
 [[package]]
 name = "getrandom"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e65cce4e5084b14874c4e7097f38cab54f47ee554f9194673456ea379dcc4c55"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static",
+ "libc",
 ]
 
 [[package]]
+name = "gimli"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"
+
+[[package]]
 name = "lazy_static"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"
 dependencies = [
- "spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spin",
 ]
 
 [[package]]
 name = "libc"
 version = "0.2.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6281b86796ba5e4366000be6e9e18bf35580adf9e63fbe2294aadb587613a319"
 
 [[package]]
 name = "libdbus-sys"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18cb88963258d00f4962205dbb5933d82780d9962c8c8a064b651d2ad7189210"
 dependencies = [
- "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config",
 ]
 
 [[package]]
 name = "libsystemd-sys"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7b98458cd04a5c3aacba6f1a3a3c4b9abcb0ae4d66a055eee502e0d52dc226b"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "pkg-config",
 ]
 
 [[package]]
 name = "log"
 version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9",
 ]
 
 [[package]]
 name = "memchr"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "148fab2e51b4f1cfc66da2a7c32981d1d3c083a803978268bb11fe4b86925e7a"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f2d26ec3309788e423cfbf68ad1800f061638098d76a83681af979dc4eda19d"
+dependencies = [
+ "adler",
+ "autocfg 1.0.1",
 ]
 
 [[package]]
 name = "nix"
 version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags",
+ "cc",
+ "cfg-if 0.1.9",
+ "libc",
+ "void",
 ]
 
 [[package]]
 name = "nodrop"
 version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
 
 [[package]]
 name = "num-integer"
 version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b85e541ef8255f6cf42bbfe4ef361305c6c135d10919ecc26126c4e5ae94bc09"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.4",
+ "num-traits",
 ]
 
 [[package]]
 name = "num-traits"
 version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ba9a427cfca2be13aa6f6403b0b7e7368fe982bfa16fccc450ce74c46cd9b32"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.4",
 ]
 
 [[package]]
 name = "numtoa"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
+
+[[package]]
+name = "object"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37fd5004feb2ce328a52b0b3d01dbf4ffff72583493900ed15f22d4111c51693"
 
 [[package]]
 name = "pkg-config"
 version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
 
 [[package]]
 name = "ppv-lite86"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3cbf9f658cdb5000fcf6f362b8ea2ba154b9f146a61c7a20d647034c6b6561b"
 
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 dependencies = [
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "quote"
 version = "0.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
 ]
 
 [[package]]
 name = "rand"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d47eab0e83d9693d40f825f86948aa16eff6750ead4bdffc4ab95b8b3a7f052c"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom",
+ "libc",
+ "rand_chacha",
+ "rand_core 0.5.0",
+ "rand_hc",
 ]
 
 [[package]]
 name = "rand_chacha"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e193067942ef6f485a349a113329140d0ab9e2168ce92274499bb0e9a4190d9d"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.4",
+ "c2-chacha",
+ "rand_core 0.5.0",
 ]
 
 [[package]]
 name = "rand_core"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
 dependencies = [
- "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0",
 ]
 
 [[package]]
 name = "rand_core"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0e7a549d590831370895ab7ba4ea0c1b6b011d106b5ff2da6eee112615e6dc0"
 
 [[package]]
 name = "rand_core"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "615e683324e75af5d43d8f7a39ffe3ee4a9dc42c5c701167a71dc59c3a493aca"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom",
 ]
 
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 dependencies = [
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.0",
 ]
 
 [[package]]
 name = "rand_os"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
 dependencies = [
- "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cloudabi",
+ "fuchsia-cprng",
+ "libc",
+ "rand_core 0.4.0",
+ "rdrand",
+ "winapi",
 ]
 
 [[package]]
 name = "rdrand"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
 dependencies = [
- "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1",
 ]
 
 [[package]]
 name = "redox_syscall"
 version = "0.1.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 
 [[package]]
 name = "redox_termios"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
 dependencies = [
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall",
 ]
 
 [[package]]
 name = "redox_users"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fe5204c3a17e97dde73f285d49be585df59ed84b50a872baf416e73b62c3828"
 dependencies = [
- "argon2rs 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "argon2rs",
+ "failure",
+ "rand_os",
+ "redox_syscall",
 ]
 
 [[package]]
 name = "remove_dir_all"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
 dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi",
 ]
 
 [[package]]
 name = "rustc-demangle"
 version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7f4dccf6f4891ebcc0c39f9b6eb1a83b9bf5d747cb439ec6fba4f3b977038af"
 
 [[package]]
 name = "scoped_threadpool"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
 
 [[package]]
 name = "simplelog"
 version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e95345f185d5adeb8ec93459d2dc99654e294cc6ccf5b75414d8ea262de9a13"
 dependencies = [
- "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "term 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chrono",
+ "log",
+ "term",
 ]
 
 [[package]]
 name = "spin"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44363f6f51401c34e7be73db0db371c04705d35efbe9f7d6082e03a921a32c55"
 
 [[package]]
 name = "strsim"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "syn"
 version = "0.15.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4d960b829a55e56db167e861ddb43602c003c7be0bee1d345021703fac2fb7c"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "synstructure"
 version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "systemd"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daf2fd2d346d2dfb5fdc5f47b355f60dcfc35f5ee3e89e64e7ae2849ec8792a5"
 dependencies = [
- "cstr-argument 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "libsystemd-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "utf8-cstr 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cstr-argument",
+ "libc",
+ "libsystemd-sys",
+ "log",
+ "utf8-cstr",
 ]
 
 [[package]]
 name = "tempfile"
 version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9",
+ "libc",
+ "rand",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
 ]
 
 [[package]]
 name = "term"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "dirs",
+ "winapi",
 ]
 
 [[package]]
 name = "termion"
 version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a8fb22f7cde82c8220e5aeacb3258ed7ce996142c77cba193f203515e26c330"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "numtoa",
+ "redox_syscall",
+ "redox_termios",
 ]
 
 [[package]]
 name = "textwrap"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 dependencies = [
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width",
 ]
 
 [[package]]
 name = "time"
 version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "redox_syscall",
+ "winapi",
 ]
 
 [[package]]
 name = "unicode-width"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
 
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 
 [[package]]
 name = "utf8-cstr"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55bcbb425141152b10d5693095950b51c3745d019363fc2929ffd8f61449b628"
 
 [[package]]
 name = "vec_map"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 
 [[package]]
 name = "void"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 
 [[package]]
 name = "winapi"
 version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
 dependencies = [
- "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
 ]
 
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
-"checksum argon2rs 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3f67b0b6a86dae6e67ff4ca2b6201396074996379fba2b92ff649126f37cb392"
-"checksum arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
-"checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
-"checksum autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "0e49efa51329a5fd37e7c79db4621af617cd4e3e5bc224939808d076077077bf"
-"checksum backtrace 0.3.32 (registry+https://github.com/rust-lang/crates.io-index)" = "18b50f5258d1a9ad8396d2d345827875de4261b158124d4c819d9b351454fae5"
-"checksum backtrace-sys 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)" = "5b3a000b9c543553af61bc01cbfc403b04b5caa9e421033866f2e98061eb3e61"
-"checksum bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
-"checksum blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6d530bdd2d52966a6d03b7a964add7ae1a288d25214066fd4b600f0f796400"
-"checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
-"checksum c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7d64d04786e0f528460fc884753cf8dddcc466be308f6026f8e355c41a0e4101"
-"checksum cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)" = "39f75544d7bbaf57560d2168f28fd649ff9c76153874db88bdbdfd839b1a7e7d"
-"checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
-"checksum chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "77d81f58b7301084de3b958691458a53c3f7e0b1d702f77e550b6a88e3a88abe"
-"checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
-"checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-"checksum constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"
-"checksum cstr-argument 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "514570a4b719329df37f93448a70df2baac553020d0eb43a8dfa9c1f5ba7b658"
-"checksum ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c7dfd2d8b4c82121dfdff120f818e09fc4380b0b7e17a742081a89b94853e87f"
-"checksum dbus 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b9e1b39f3f6aa3d4a1522c4f0f9f1e9e9167bd93740a8690874caa7cf8ce47d7"
-"checksum dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
-"checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
-"checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
-"checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-"checksum getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e65cce4e5084b14874c4e7097f38cab54f47ee554f9194673456ea379dcc4c55"
-"checksum lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"
-"checksum libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "6281b86796ba5e4366000be6e9e18bf35580adf9e63fbe2294aadb587613a319"
-"checksum libdbus-sys 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "18cb88963258d00f4962205dbb5933d82780d9962c8c8a064b651d2ad7189210"
-"checksum libsystemd-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d7b98458cd04a5c3aacba6f1a3a3c4b9abcb0ae4d66a055eee502e0d52dc226b"
-"checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
-"checksum memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "148fab2e51b4f1cfc66da2a7c32981d1d3c083a803978268bb11fe4b86925e7a"
-"checksum nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
-"checksum nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
-"checksum num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "b85e541ef8255f6cf42bbfe4ef361305c6c135d10919ecc26126c4e5ae94bc09"
-"checksum num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "6ba9a427cfca2be13aa6f6403b0b7e7368fe982bfa16fccc450ce74c46cd9b32"
-"checksum numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
-"checksum pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
-"checksum ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e3cbf9f658cdb5000fcf6f362b8ea2ba154b9f146a61c7a20d647034c6b6561b"
-"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
-"checksum quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
-"checksum rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d47eab0e83d9693d40f825f86948aa16eff6750ead4bdffc4ab95b8b3a7f052c"
-"checksum rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e193067942ef6f485a349a113329140d0ab9e2168ce92274499bb0e9a4190d9d"
-"checksum rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-"checksum rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d0e7a549d590831370895ab7ba4ea0c1b6b011d106b5ff2da6eee112615e6dc0"
-"checksum rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "615e683324e75af5d43d8f7a39ffe3ee4a9dc42c5c701167a71dc59c3a493aca"
-"checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-"checksum rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
-"checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-"checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
-"checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
-"checksum redox_users 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3fe5204c3a17e97dde73f285d49be585df59ed84b50a872baf416e73b62c3828"
-"checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
-"checksum rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f4dccf6f4891ebcc0c39f9b6eb1a83b9bf5d747cb439ec6fba4f3b977038af"
-"checksum scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
-"checksum simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e95345f185d5adeb8ec93459d2dc99654e294cc6ccf5b75414d8ea262de9a13"
-"checksum spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44363f6f51401c34e7be73db0db371c04705d35efbe9f7d6082e03a921a32c55"
-"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-"checksum syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d960b829a55e56db167e861ddb43602c003c7be0bee1d345021703fac2fb7c"
-"checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
-"checksum systemd 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "daf2fd2d346d2dfb5fdc5f47b355f60dcfc35f5ee3e89e64e7ae2849ec8792a5"
-"checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
-"checksum term 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
-"checksum termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6a8fb22f7cde82c8220e5aeacb3258ed7ce996142c77cba193f203515e26c330"
-"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
-"checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
-"checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
-"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-"checksum utf8-cstr 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "55bcbb425141152b10d5693095950b51c3745d019363fc2929ffd8f61449b628"
-"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
-"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-"checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
-"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

          
M Cargo.toml +17 -16
@@ 8,6 8,23 @@ authors = ["Floris Bruynooghe <flub@devo
 build = "build.rs"
 edition = "2018"
 
+[dependencies]
+backtrace = "0.3.53"
+clap = "2.31"
+ctrlc = {version = "3.1.2", features = ["termination"]}
+dbus = "0.6.4"
+failure = "0.1.5"
+failure_derive = "0.1.5"
+log = "0.4.1"
+simplelog = "0.5.2"
+systemd = "0.4.0"
+
+[build-dependencies]
+clap = "2.31"
+
+[dev-dependencies]
+tempfile = "3"
+
 [package.metadata.deb]
 license-file = ["LICENSE", "0"]
 extended-description = """\

          
@@ 39,19 56,3 @@ assets = [
     ["target/release/completions/_brightd", "usr/share/zsh/vendor-completions/", "644"],
 ]
 maintainer-scripts = "debian"
-
-[dependencies]
-failure = "0.1.5"
-failure_derive = "0.1.5"
-clap = "2.31"
-ctrlc = {version="3.1.2", features=["termination"]}
-dbus = "0.6.4"
-log = "0.4.1"
-simplelog = "0.5.2"
-systemd = "0.4.0"
-
-[build-dependencies]
-clap = "2.31"
-
-[dev-dependencies]
-tempfile = "3"

          
A => src/error.rs +173 -0
@@ 0,0 1,173 @@ 
+//! Error types.
+use std::error::Error;
+use std::fmt;
+use std::sync::Mutex;
+
+use backtrace::Backtrace;
+
+/// Type describing an error.
+///
+/// This is typically used as the inner value of an error.  You can simply dispatch
+/// [fmt::Display], [fmt::Debug] and [Error] to the inner implementation.
+///
+/// All that is needed is that the data in `T` has a [fmt::Display] which describes the
+/// error.  For now it is recommended to keep this to a single line description.
+///
+/// # Example
+///
+/// ```
+/// use std::error::Error;
+/// use std::fmt;
+/// use bright::error::ErrInfo;
+///
+/// struct MyError {
+///     inner: Box<ErrInfo<&'static str>>,
+/// }
+///
+/// impl fmt::Display for MyError {
+///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+///         fmt::Display::fmt(&self.inner, f)
+///     }
+/// }
+///
+/// impl fmt::Debug for MyError {
+///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+///         fmt::Debug::fmt(&self.inner, f)
+///     }
+/// }
+///
+/// impl Error for MyError {
+///     fn source(&self) -> Option<&(dyn Error + 'static)> {
+///         self.inner.source()
+///     }
+/// }
+///
+/// // Optionally also implement `From` trait for some types.
+/// impl From<std::io::Error> for MyError {
+///     fn from(source: std::io::Error) -> Self {
+///         Self {
+///             inner: ErrInfo::boxed_with_source("oops", source),
+///         }
+///     }
+/// }
+///
+/// fn main() {
+///     let err = MyError { inner: ErrInfo::boxed("oops") };
+///     println!("{:?}", err);
+///
+///     let ioerr = std::io::Error::from(std::io::ErrorKind::NotFound);
+///     let err = MyError::from(ioerr);
+///     println!("{:?}", err);
+/// }
+/// ```
+pub struct ErrInfo<T>
+where
+    T: fmt::Display + 'static,
+{
+    data: T,
+    source: Option<Box<dyn Error + Send + Sync + 'static>>,
+    backtrace: Mutex<Backtrace>,
+}
+
+impl<T> ErrInfo<T>
+where
+    T: fmt::Display + 'static,
+{
+    pub fn new(data: T) -> Self {
+        Self {
+            data,
+            source: None,
+            backtrace: Mutex::new(Backtrace::new_unresolved()),
+        }
+    }
+
+    pub fn boxed(data: T) -> Box<Self> {
+        Box::new(Self::new(data))
+    }
+
+    pub fn with_source<S>(data: T, source: S) -> Self
+    where
+        S: Error + Send + Sync + 'static,
+    {
+        Self {
+            data,
+            source: Some(Box::new(source)),
+            backtrace: Mutex::new(Backtrace::new_unresolved()),
+        }
+    }
+
+    pub fn boxed_with_source<S>(data: T, source: S) -> Box<Self>
+    where
+        S: Error + Send + Sync + 'static,
+    {
+        Box::new(Self::with_source(data, source))
+    }
+
+    pub fn data(&self) -> &T {
+        &self.data
+    }
+}
+
+impl<T> Error for ErrInfo<T>
+where
+    T: fmt::Display + 'static,
+{
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self.source {
+            None => None,
+            Some(ref boxed) => Some(boxed.as_ref()),
+        }
+    }
+}
+
+impl<T> fmt::Display for ErrInfo<T>
+where
+    T: fmt::Display + 'static,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.data)?;
+        if f.alternate() {
+            let mut next = self.source();
+            while let Some(source) = next {
+                write!(f, ": {}", source)?;
+                next = source.source();
+            }
+        }
+        Ok(())
+    }
+}
+
+impl<T> fmt::Debug for ErrInfo<T>
+where
+    T: fmt::Display + 'static,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "Error: {}", self.data)?;
+        if let Some(ref source) = self.source() {
+            writeln!(f)?;
+            writeln!(f, "Caused by:")?;
+            writeln!(f, "    {}", source)?;
+        }
+        writeln!(f)?;
+        writeln!(f, "Stack backtrace:")?;
+        let mut bt = self.backtrace.lock().unwrap();
+        bt.resolve();
+        write!(f, "{:?}", bt)?;
+
+        if let Some(ref first_source) = self.source() {
+            let mut next = first_source.source();
+            while let Some(ref source) = next {
+                writeln!(f)?;
+                writeln!(f, "Caused by:")?;
+                writeln!(f, "    {}", source)?;
+                // if let Some(bt) = source.backtrace() {
+                //     writeln!(f)?;
+                //     writeln!(f, "Stack backtrace:")?;
+                //     writeln!(f, "{:?}", bt)?;
+                // }
+                next = source.source();
+            }
+        }
+        Ok(())
+    }
+}

          
M src/lib.rs +115 -24
@@ 1,20 1,110 @@ 
+use std::error::Error;
 use std::fmt;
 use std::fs;
-use std::io::prelude::*;
+use std::path::PathBuf;
+
+use crate::error::ErrInfo;
 
 pub mod cli;
 pub mod dbus;
+pub mod error;
 pub mod pond;
 
-pub fn create_devices(only: Vec<String>) -> Result<Vec<BacklightDevice>, failure::Error> {
+/// Which I/O operation failed for [DeviceError].
+#[derive(Debug, Copy, Clone)]
+pub enum DeviceIoKind {
+    /// A read operation failed.
+    Read,
+    /// A write operation failed.
+    Write,
+    /// Parsing the contents failed.
+    Parse,
+}
+
+impl fmt::Display for DeviceIoKind {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Read => write!(f, "read"),
+            Self::Write => write!(f, "write"),
+            Self::Parse => write!(f, "parse"),
+        }
+    }
+}
+
+/// Error data for [DeviceReadError].
+#[derive(Debug, Clone)]
+struct DeviceErrorData {
+    path: PathBuf,
+    kind: DeviceIoKind,
+}
+
+impl fmt::Display for DeviceErrorData {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "Failed to {} sysfs path {}",
+            self.kind,
+            self.path.display()
+        )
+    }
+}
+
+/// Error for working with [BacklightDevice] structs.
+pub struct DeviceError {
+    inner: Box<error::ErrInfo<DeviceErrorData>>,
+}
+
+impl fmt::Display for DeviceError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(&self.inner, f)
+    }
+}
+
+impl fmt::Debug for DeviceError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.inner, f)
+    }
+}
+
+impl Error for DeviceError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        Error::source(&self.inner)
+    }
+}
+
+impl DeviceError {
+    fn new<S, P>(source: S, path: P, kind: DeviceIoKind) -> Self
+    where
+        S: Error + Send + Sync + 'static,
+        P: Into<PathBuf>,
+    {
+        Self {
+            inner: ErrInfo::boxed_with_source(
+                DeviceErrorData {
+                    path: path.into(),
+                    kind,
+                },
+                source,
+            ),
+        }
+    }
+
+    // We use the kind in Display, but do not currently match it.  This could be
+    // exposed if needed.
+    // fn kind(&self) -> DeviceIoKind {
+    //     self.inner.data().kind
+    // }
+}
+
+pub fn create_devices(only: Vec<String>) -> Result<Vec<BacklightDevice>, DeviceError> {
     let base = std::path::Path::new("/sys/class/backlight/");
-    let entries = base.read_dir()?;
+    let entries = base
+        .read_dir()
+        .map_err(|e| DeviceError::new(e, base.to_owned(), DeviceIoKind::Read))?;
     let mut devices: Vec<BacklightDevice> = Vec::new();
     for dirent in entries {
-        match dirent {
-            Ok(m) => devices.push(BacklightDevice::new(&m.path())),
-            Err(e) => return Err(From::from(e)),
-        }
+        let dirent = dirent.map_err(|e| DeviceError::new(e, &base, DeviceIoKind::Read))?;
+        devices.push(BacklightDevice::new(&dirent.path()));
     }
     if !only.is_empty() {
         devices.retain(|d| only.contains(&String::from(d.name())));

          
@@ 59,13 149,13 @@ impl BacklightDevice {
     }
 
     /// Reads and return the max_brightness value.
-    pub fn max_brightness(&self) -> Result<u32, failure::Error> {
+    pub fn max_brightness(&self) -> Result<u32, DeviceError> {
         let path = self.path.join("max_brightness");
         read_uint(&path)
     }
 
     /// Gets the current raw brightness value.
-    pub fn get_brightness(&self) -> Result<u32, failure::Error> {
+    pub fn get_brightness(&self) -> Result<u32, DeviceError> {
         let path = self.path.join("brightness");
         read_uint(&path)
     }

          
@@ 73,15 163,15 @@ impl BacklightDevice {
     /// Sets the raw brightness value.
     ///
     /// Returns the new brightness.
-    pub fn set_brightness(&self, n: u32) -> Result<u32, failure::Error> {
+    pub fn set_brightness(&self, n: u32) -> Result<u32, DeviceError> {
         let path = self.path.join("brightness");
-        let mut fp = fs::File::create(&path)?;
-        write!(fp, "{}", n)?;
+        fs::write(&path, n.to_string())
+            .map_err(|e| DeviceError::new(e, path, DeviceIoKind::Write))?;
         Ok(n)
     }
 
     /// Gets brightness as percentage.
-    pub fn get(&self) -> Result<u32, failure::Error> {
+    pub fn get(&self) -> Result<u32, DeviceError> {
         let max = self.max_brightness()?;
         let cur = self.get_brightness()?;
         let pct = 100.0 * cur as f64 / max as f64;

          
@@ 91,7 181,7 @@ impl BacklightDevice {
     /// Sets brightness as percentage.
     ///
     /// Returns the new raw brightness.
-    pub fn set(&self, n: u32) -> Result<u32, failure::Error> {
+    pub fn set(&self, n: u32) -> Result<u32, DeviceError> {
         let max = self.max_brightness()?;
         let raw = match (max as f64 / 100.0 * n as f64).round() as u32 {
             r if r <= max => r,

          
@@ 101,7 191,7 @@ impl BacklightDevice {
     }
 
     /// Increases brightness with percentage.
-    pub fn incr(&self, n: u32) -> Result<u32, failure::Error> {
+    pub fn incr(&self, n: u32) -> Result<u32, DeviceError> {
         let max = self.max_brightness()?;
         let cur = self.get_brightness()?;
         let inc = (max as f64 / 100.0 * n as f64) as u32;

          
@@ 113,7 203,7 @@ impl BacklightDevice {
     }
 
     /// Decreases brightness with percentage.
-    pub fn decr(&self, n: u32) -> Result<u32, failure::Error> {
+    pub fn decr(&self, n: u32) -> Result<u32, DeviceError> {
         let max = self.max_brightness()?;
         let cur = self.get_brightness()?;
         let dec = (max as f64 / 100.0 * n as f64) as u32;

          
@@ 126,20 216,21 @@ impl BacklightDevice {
 }
 
 /// Reads the unsinged integer from a /sys file.
-fn read_uint(path: &std::path::Path) -> Result<u32, failure::Error> {
-    let mut fp = fs::File::open(path)?;
-    let mut contents = String::new();
-    fp.read_to_string(&mut contents)?;
-    match contents.trim().parse::<u32>() {
-        Ok(m) => Ok(m),
-        Err(e) => Err(From::from(e)),
-    }
+fn read_uint(path: &std::path::Path) -> Result<u32, DeviceError> {
+    let contents =
+        fs::read_to_string(path).map_err(|e| DeviceError::new(e, path, DeviceIoKind::Read))?;
+    contents
+        .trim()
+        .parse::<u32>()
+        .map_err(|e| DeviceError::new(e, path, DeviceIoKind::Parse))
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
+
     use std::fs;
+    use std::io::prelude::*;
 
     fn create_device(cur: u32, max: u32) -> tempfile::TempDir {
         assert!(cur <= max);