package-name option support, it needs for Cargo.toml without root package

Signed-off-by: Miezhiko <Miezhiko@gmail.com>
Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>

5 files changed, 84 insertions, 261 deletions

diff --git a/.gitignore b/.gitignore
index 11d7baa..a2687e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 target
 *.rs.bk
+*.ebuild
diff --git a/Cargo.lock b/Cargo.lock
index a2137a9..3f35df7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -22,9 +22,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.43"
+version = "1.0.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28ae2b3dec75a406790005a200b1bd89785afc02517a00ca99ecfe093ee9e6cf"
+checksum = "61604a8f862e1d5c3229fdd78f8b02c68dcf73a4c4b05fd636d12240aaa242c1"
 
 [[package]]
 name = "atty"
@@ -44,12 +44,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
-name = "base-x"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4521f3e3d031370679b3b140beb36dfe4801b09ac77e30c61941f97df3ef28b"
-
-[[package]]
 name = "bitflags"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -78,20 +72,14 @@ dependencies = [
 
 [[package]]
 name = "bstr"
-version = "0.2.16"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90682c8d613ad3373e66de8c6411e0ae2ab2571e879d2efbf73558cc66f21279"
+checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
-name = "bumpalo"
-version = "3.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c59e7af012c713f529e7a3ee57ce9b31ddd858d4b512923602f74608b009631"
-
-[[package]]
 name = "byte-tools"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -134,7 +122,7 @@ version = "7.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fb04b88bd5b2036e30704f95c6ee16f3b5ca3b4ca307da2889d9006648e5c88"
 dependencies = [
- "semver 1.0.4",
+ "semver",
  "serde",
  "toml",
  "url",
@@ -157,16 +145,16 @@ checksum = "c297bd3135f558552f99a0daa180876984ea2c4ffa7470314540dff8c654109a"
 dependencies = [
  "camino",
  "cargo-platform",
- "semver 1.0.4",
+ "semver",
  "serde",
  "serde_json",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.69"
+version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e70cc2f62c6ce1868963827bd677764c62d07c3d9a3e1fb1177ee1a9ab199eb2"
+checksum = "d26a6ce4b6a484fa3edb70f7efa6fc430fd2b87285fe8b84304fd0936faa0dc0"
 dependencies = [
  "jobserver",
 ]
@@ -193,12 +181,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "const_fn"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f92cfa0fd5690b3cf8c1ef2cabbd9b7ef22fa53cf5e1f92b05103f6d5d1cf6e7"
-
-[[package]]
 name = "crates-index"
 version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -209,7 +191,7 @@ dependencies = [
  "hex",
  "home",
  "memchr",
- "semver 1.0.4",
+ "semver",
  "serde",
  "serde_derive",
  "serde_json",
@@ -245,12 +227,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "discard"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
-
-[[package]]
 name = "either"
 version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -306,9 +282,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.13.21"
+version = "0.13.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "659cd14835e75b64d9dba5b660463506763cf0aa6cb640aeeb0e98d841093490"
+checksum = "9c1cbbfc9a1996c6af82c2b4caf828d2c653af4fcdbb0e5674cc966eee5a4197"
 dependencies = [
  "bitflags",
  "libc",
@@ -462,15 +438,15 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.101"
+version = "0.2.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3cb00336871be5ed2c8ed44b60ae9959dc5b9f08539422ed43f09e34ecaeba21"
+checksum = "a2a5ac8f984bfcf3a823267e5fde638acc3325f6496633a5da6bb6eb2171e103"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.12.22+1.1.0"
+version = "0.12.23+1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89c53ac117c44f7042ad8d8f5681378dfbc6010e49ec2c0d1f11dfedc7a4a1c3"
+checksum = "29730a445bae719db3107078b46808cc45a5b7a6bae3f31272923af969453356"
 dependencies = [
  "cc",
  "libc",
@@ -553,9 +529,9 @@ checksum = "28988d872ab76095a6e6ac88d99b54fd267702734fd7ffe610ca27f533ddb95a"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.66"
+version = "0.9.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1996d2d305e561b70d1ee0c53f1542833f4e1ac6ce9a6708b6ff2738ca67dc82"
+checksum = "69df2d8dfc6ce3aaf44b40dec6f487d5a886516cf6879c49e98e0710f310a058"
 dependencies = [
  "autocfg",
  "cc",
@@ -615,9 +591,9 @@ dependencies = [
 
 [[package]]
 name = "phf"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2ac8b67553a7ca9457ce0e526948cad581819238f4a9d1ea74545851fa24f37"
+checksum = "b9fc3db1018c4b59d7d582a739436478b6035138b6aecbce989fc91c3e98409f"
 dependencies = [
  "phf_macros",
  "phf_shared",
@@ -626,9 +602,9 @@ dependencies = [
 
 [[package]]
 name = "phf_generator"
-version = "0.9.1"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d43f3220d96e0080cc9ea234978ccd80d904eafb17be31bb0f76daaea6493082"
+checksum = "5d5285893bb5eb82e6aaf5d59ee909a06a16737a8970984dd7746ba9283498d6"
 dependencies = [
  "phf_shared",
  "rand",
@@ -636,9 +612,9 @@ dependencies = [
 
 [[package]]
 name = "phf_macros"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b706f5936eb50ed880ae3009395b43ed19db5bff2ebd459c95e7bf013a89ab86"
+checksum = "58fdf3184dd560f160dd73922bea2d5cd6e8f064bf4b13110abd81b03697b4e0"
 dependencies = [
  "phf_generator",
  "phf_shared",
@@ -650,9 +626,9 @@ dependencies = [
 
 [[package]]
 name = "phf_shared"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a68318426de33640f02be62b4ae8eb1261be2efbc337b60c54d845bf4484e0d9"
+checksum = "b6796ad771acdc0123d2a88dc428b5e38ef24456743ddb1744ed628f9815c096"
 dependencies = [
  "siphasher",
 ]
@@ -710,9 +686,9 @@ checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.28"
+version = "1.0.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c7ed8b8c7b886ea3ed7dde405212185f423ab44682667c8c6dd14aa1d9f6612"
+checksum = "b9f5105d4fdaab20335ca9565e106a5d9b82b6219b5ba735731124ac6711d23d"
 dependencies = [
  "unicode-xid",
 ]
@@ -784,19 +760,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
 [[package]]
-name = "rustc_version"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
-dependencies = [
- "semver 0.9.0",
-]
-
-[[package]]
 name = "rustsec"
-version = "0.24.2"
+version = "0.24.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c29c220a60ceaeedb2c5bf51826b3d3c5d77b2523693f0579c8a85dd03f11947"
+checksum = "bcf7c16b24c1facb34fc8392fdcf4986c369335973441ccc2ff11ba7341b7ee2"
 dependencies = [
  "cargo-lock",
  "crates-index",
@@ -807,7 +774,7 @@ dependencies = [
  "humantime",
  "humantime-serde",
  "platforms",
- "semver 1.0.4",
+ "semver",
  "serde",
  "smol_str",
  "thiserror",
@@ -832,15 +799,6 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
-dependencies = [
- "semver-parser",
-]
-
-[[package]]
-name = "semver"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "568a8e6258aa33c13358f81fd834adb854c6f7c9468520910a9b1e8fac068012"
@@ -849,25 +807,19 @@ dependencies = [
 ]
 
 [[package]]
-name = "semver-parser"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-
-[[package]]
 name = "serde"
-version = "1.0.129"
+version = "1.0.130"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1f72836d2aa753853178eda473a3b9d8e4eefdaf20523b919677e6de489f8f1"
+checksum = "f12d06de37cf59146fbdecab66aa99f9fe4f78722e3607577a5375d66bd0c913"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.129"
+version = "1.0.130"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e57ae87ad533d9a56427558b516d0adac283614e347abf85b0dc0cbbf0a249f3"
+checksum = "d7bc1a1ab1961464eae040d96713baa5a724a8152c1222492465b54322ec508b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -876,9 +828,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.66"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "336b10da19a12ad094b59d870ebde26a45402e5b470add4b5fd03c5048a32127"
+checksum = "0f690853975602e1bfe1ccbf50504d67174e3bcf340f23b5ea9992e0587a52d8"
 dependencies = [
  "itoa",
  "ryu",
@@ -898,16 +850,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "sha1"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
-
-[[package]]
 name = "siphasher"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "729a25c17d72b06c68cb47955d44fda88ad2d3e7d77e025663fdd69b93dd71a1"
+checksum = "533494a8f9b724d33625ab53c6c4800f7cc445895924a8ef649222dcb76e938b"
 
 [[package]]
 name = "smartstring"
@@ -926,70 +872,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ca0f7ce3a29234210f0f4f0b56f8be2e722488b95cb522077943212da3b32eb"
 
 [[package]]
-name = "standback"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e113fb6f3de07a243d434a56ec6f186dfd51cb08448239fe7bcae73f87ff28ff"
-dependencies = [
- "version_check",
-]
-
-[[package]]
 name = "static_assertions"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
-name = "stdweb"
-version = "0.4.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d022496b16281348b52d0e30ae99e01a73d737b2f45d38fed4edf79f9325a1d5"
-dependencies = [
- "discard",
- "rustc_version",
- "stdweb-derive",
- "stdweb-internal-macros",
- "stdweb-internal-runtime",
- "wasm-bindgen",
-]
-
-[[package]]
-name = "stdweb-derive"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c87a60a40fccc84bef0652345bbbbbe20a605bf5d0ce81719fc476f5c03b50ef"
-dependencies = [
- "proc-macro2",
- "quote",
- "serde",
- "serde_derive",
- "syn",
-]
-
-[[package]]
-name = "stdweb-internal-macros"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
-dependencies = [
- "base-x",
- "proc-macro2",
- "quote",
- "serde",
- "serde_derive",
- "serde_json",
- "sha1",
- "syn",
-]
-
-[[package]]
-name = "stdweb-internal-runtime"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
-
-[[package]]
 name = "strsim"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -997,9 +885,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.22"
+version = "0.3.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69b041cdcb67226aca307e6e7be44c8806423d83e018bd662360a93dabce4d71"
+checksum = "bf9d950ef167e25e0bdb073cf1d68e9ad2795ac826f2f3f59647817cf23c0bfa"
 dependencies = [
  "clap",
  "lazy_static",
@@ -1008,9 +896,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.15"
+version = "0.4.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7813934aecf5f51a54775e00068c237de98489463968231a51746bbbc03f9c10"
+checksum = "134d838a2c9943ac3125cf6df165eda53493451b719f3255b2a26b85f772d0ba"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -1021,9 +909,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.75"
+version = "1.0.76"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7f58f7e8eaa0009c5fec437aabf511bd9933e4b2d7407bd05273c01a8906ea7"
+checksum = "c6f107db402c2c2055242dbf4d2af0e69197202e9faacbef9571bbe47f5a1b84"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1057,18 +945,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.26"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93119e4feac1cbe6c798c34d3a53ea0026b0b1de6a120deef895137c0529bfe2"
+checksum = "fa6f76457f59514c7eeb4e59d891395fab0b2fd1d40723ae737d64153392e9c6"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.26"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "060d69a0afe7796bf42e9e2ff91f5ee691fb15c53d38b4b62a9a53eb23164745"
+checksum = "8a36768c0fbf1bb15eca10defa29526bda730a2376c2ab4393ccfa16fb1a318d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1086,47 +974,18 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.2.27"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4752a97f8eebd6854ff91f1c1824cd6160626ac4bd44287f7f4ea2035a02a242"
+checksum = "3e0a10c9a9fb3a5dce8c2239ed670f1a2569fcf42da035f5face1b19860d52b0"
 dependencies = [
- "const_fn",
  "libc",
- "standback",
- "stdweb",
- "time-macros",
- "version_check",
- "winapi",
-]
-
-[[package]]
-name = "time-macros"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "957e9c6e26f12cb6d0dd7fc776bb67a706312e7299aed74c8dd5b17ebb27e2f1"
-dependencies = [
- "proc-macro-hack",
- "time-macros-impl",
-]
-
-[[package]]
-name = "time-macros-impl"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd3c141a1b43194f3f56a1411225df8646c55781d5f26db825b3d98507eb482f"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2",
- "quote",
- "standback",
- "syn",
 ]
 
 [[package]]
 name = "tinyvec"
-version = "1.3.1"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "848a1e1181b9f6753b5e96a092749e29b11d19ede67dfbbd6c7dc7e0f49b5338"
+checksum = "5241dd6f21443a3606b432718b166d3cedc962fd4b8bea54a8bc7f514ebda986"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -1148,9 +1007,9 @@ dependencies = [
 
 [[package]]
 name = "typenum"
-version = "1.13.0"
+version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
+checksum = "b63708a265f51345575b27fe43f9500ad611579e764c79edbc2037b1121959ec"
 
 [[package]]
 name = "ucd-trie"
@@ -1231,9 +1090,9 @@ checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
 [[package]]
 name = "unicode-xid"
@@ -1290,60 +1149,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 
 [[package]]
-name = "wasm-bindgen"
-version = "0.2.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce9b1b516211d33767048e5d47fa2a381ed8b76fc48d2ce4aa39877f9f183e0"
-dependencies = [
- "cfg-if",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfe8dc78e2326ba5f845f4b5bf548401604fa20b1dd1d365fb73b6c1d6364041"
-dependencies = [
- "bumpalo",
- "lazy_static",
- "log",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44468aa53335841d9d6b6c023eaab07c0cd4bddbcfdee3e2bb1e8d2cb8069fef"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0195807922713af1e67dc66132c7328206ed9766af3858164fb583eedc25fbad"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "acdb075a845574a1fa5f09fd77e43f7747599301ea3417a9fbffdeedfc1f4a29"
-
-[[package]]
 name = "winapi"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 902d237..4140a60 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,10 +30,10 @@ itertools = "^0.10"
 rustsec = "0.24.2"
 structopt = "^0.3"
 serde = { version = "1.0", features = ["derive"] }
-time = "^0.2"
+time = "^0.3"
 
 [dependencies.phf]
-version = "0.9"
+version = "0.10"
 features = ["macros"]
 
 [dependencies.tera]
diff --git a/src/lib.rs b/src/lib.rs
index f478bc0..94ebf71 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,7 +23,9 @@ use audit::audit_package;
 use license::{normalize_license, split_spdx_license};
 use metadata::EbuildConfig;
 
-pub fn gen_ebuild_data(manifest_path: Option<&Path>, audit: bool) -> Result<EbuildConfig> {
+pub fn gen_ebuild_data( manifest_path: Option<&Path>
+                      , package_name: Option<&str>
+                      , audit: bool ) -> Result<EbuildConfig> {
     let mut cmd = MetadataCommand::new();
 
     cmd.features(CargoOpt::AllFeatures);
@@ -41,10 +43,19 @@ pub fn gen_ebuild_data(manifest_path: Option<&Path>, audit: bool) -> Result<Ebui
         .as_ref()
         .ok_or_else(|| format_err!("cargo metadata did not resolve the depend graph"))?;
 
-    let root = resolve
-        .root
-        .as_ref()
-        .ok_or_else(|| format_err!("cargo metadata failed to resolve the root package"))?;
+    let root = 
+        if let Some(pkg_name) = package_name {
+            let found_package =
+                metadata.packages.iter().find(|&p| {
+                    p.name == pkg_name
+                }).ok_or_else(|| format_err!("cargo metadata contains no specified package"))?;
+            &found_package.id
+        } else {
+            resolve
+                .root
+                .as_ref()
+                .ok_or_else(|| format_err!("cargo metadata failed to resolve the root package"))?
+        };
 
     if audit {
         audit_package(metadata.workspace_root.as_ref(), manifest_path)?;
@@ -54,7 +65,7 @@ pub fn gen_ebuild_data(manifest_path: Option<&Path>, audit: bool) -> Result<Ebui
     let mut crates = Vec::new();
     let mut root_pkg = None;
 
-    for pkg in metadata.packages {
+    for pkg in &metadata.packages {
         if &pkg.id == root {
             root_pkg = Some(pkg.clone());
         }
@@ -79,7 +90,7 @@ pub fn gen_ebuild_data(manifest_path: Option<&Path>, audit: bool) -> Result<Ebui
             println!("WARNING: {} uses a license-file, not handled", pkg.name);
         }
 
-        if let Some(src) = pkg.source {
+        if let Some(src) = &pkg.source {
             // Check if the crate is available at crates.io
             if src.is_crates_io() {
                 crates.push(format!("\t{}-{}\n", pkg.name, pkg.version));
diff --git a/src/main.rs b/src/main.rs
index 1072094..edffb18 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,6 +23,10 @@ struct Args {
     /// Path to Cargo.toml.
     manifest_path: Option<PathBuf>,
 
+    #[structopt(name = "PACKAGE", long = "package-name")]
+    /// Desired package name from cargo workspace
+    package_name: Option<String>,
+
     #[structopt(name = "TEMPLATE", long = "template-path", short)]
     /// Non-standard template
     template_path: Option<PathBuf>,
@@ -49,7 +53,9 @@ fn main() -> Result<()> {
     let Opt::Ebuild(opt) = Opt::from_args();
 
     // compute the data from the package that the build needs
-    let ebuild_data = gen_ebuild_data(opt.manifest_path.as_deref(), !opt.noaudit)?;
+    let ebuild_data = gen_ebuild_data( opt.manifest_path.as_deref()
+                                     , opt.package_name.as_deref()
+                                     , !opt.noaudit )?;
     let ebuild_path = format!("{}-{}.ebuild", ebuild_data.name, ebuild_data.version);
 
     write_ebuild(ebuild_data, ebuild_path.as_ref(), opt.template_path.as_deref())?;