Switch to varlink as IPC protocol

This is a lot! Whole new design on top of a statefult varlink interface.

You can now handle multiple request response cycles over a single
connection.

The error responses are lot more refined than just status codes with
optional messages and finally part of the protocol.

TODO: A lot of error handling needs to be improved.

1 files changed, 159 insertions, 277 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 4592685..aa92063 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,15 +3,6 @@
 version = 3
 
 [[package]]
-name = "aho-corasick"
-version = "1.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
-dependencies = [
- "memchr",
-]
-
-[[package]]
 name = "android-tzdata"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -27,61 +18,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "anstream"
-version = "0.6.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
-dependencies = [
- "anstyle",
- "anstyle-parse",
- "anstyle-query",
- "anstyle-wincon",
- "colorchoice",
- "is_terminal_polyfill",
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle"
-version = "1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
-
-[[package]]
-name = "anstyle-parse"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
-dependencies = [
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle-query"
-version = "1.1.1"
+name = "ansi_term"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
 dependencies = [
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "anstyle-wincon"
-version = "3.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
-dependencies = [
- "anstyle",
- "windows-sys 0.52.0",
+ "winapi",
 ]
 
 [[package]]
-name = "anyhow"
-version = "1.0.86"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
-
-[[package]]
 name = "autocfg"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -116,11 +61,23 @@ dependencies = [
 
 [[package]]
 name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
+name = "chainerror"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ce1bb7fb0c258a6600d699950da347a7a9dad66c3ce815769b5f11cf8fce78e"
+
+[[package]]
 name = "charset"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -145,52 +102,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "clap"
-version = "4.5.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e5a21b8495e732f1b3c364c9949b201ca7bae518c502c80256c96ad79eaf6ac"
-dependencies = [
- "clap_builder",
- "clap_derive",
-]
-
-[[package]]
-name = "clap_builder"
-version = "4.5.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cf2dd12af7a047ad9d6da2b6b249759a22a7abc0f474c1dae1777afa4b21a73"
-dependencies = [
- "anstream",
- "anstyle",
- "clap_lex",
- "strsim",
-]
-
-[[package]]
-name = "clap_derive"
-version = "4.5.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0"
-dependencies = [
- "heck",
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "clap_lex"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
-
-[[package]]
-name = "colorchoice"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
-
-[[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -212,27 +123,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "either"
-version = "1.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
-
-[[package]]
 name = "encoding_rs"
 version = "0.8.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b45de904aa0b010bce2ab45264d0631681847fa7b6f2eaa7dab7619943bc4f59"
 dependencies = [
- "cfg-if",
+ "cfg-if 1.0.0",
 ]
 
 [[package]]
-name = "equivalent"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
-
-[[package]]
 name = "errno"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -259,24 +158,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "hashbrown"
-version = "0.14.5"
+name = "getopts"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
-
-[[package]]
-name = "heck"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
-
-[[package]]
-name = "home"
-version = "0.5.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3d1354bf6b7235cb4a0576c2619fd4ed18183f689b12b006a0ee7329eeff9a5"
+checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
 dependencies = [
- "windows-sys 0.52.0",
+ "unicode-width",
 ]
 
 [[package]]
@@ -303,22 +190,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "indexmap"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
-dependencies = [
- "equivalent",
- "hashbrown",
-]
-
-[[package]]
-name = "is_terminal_polyfill"
-version = "1.70.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
-
-[[package]]
 name = "itoa"
 version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -337,16 +208,18 @@ dependencies = [
 name = "jwebmail-extract"
 version = "0.8.0"
 dependencies = [
- "anyhow",
+ "base64",
  "chrono",
- "clap",
  "libc",
  "log",
  "maildir",
  "mailparse",
- "protobuf",
- "protobuf-codegen",
+ "serde",
+ "serde_derive",
+ "serde_json",
  "simplelog",
+ "varlink",
+ "varlink_generator",
 ]
 
 [[package]]
@@ -395,6 +268,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
 name = "num-conv"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -425,69 +307,45 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
-name = "powerfmt"
-version = "0.2.0"
+name = "peg"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.86"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+checksum = "9f76678828272f177ac33b7e2ac2e3e73cc6c1cd1e3e387928aa69562fa51367"
 dependencies = [
- "unicode-ident",
+ "peg-macros",
+ "peg-runtime",
 ]
 
 [[package]]
-name = "protobuf"
-version = "3.5.1"
+name = "peg-macros"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bcc343da15609eaecd65f8aa76df8dc4209d325131d8219358c0aaaebab0bf6"
+checksum = "636d60acf97633e48d266d7415a9355d4389cea327a193f87df395d88cd2b14d"
 dependencies = [
- "once_cell",
- "protobuf-support",
- "thiserror",
+ "peg-runtime",
+ "proc-macro2",
+ "quote",
 ]
 
 [[package]]
-name = "protobuf-codegen"
-version = "3.5.1"
+name = "peg-runtime"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4d0cde5642ea4df842b13eb9f59ea6fafa26dcb43e3e1ee49120e9757556189"
-dependencies = [
- "anyhow",
- "once_cell",
- "protobuf",
- "protobuf-parse",
- "regex",
- "tempfile",
- "thiserror",
-]
+checksum = "9555b1514d2d99d78150d3c799d4c357a3e2c2a8062cd108e93a06d9057629c5"
 
 [[package]]
-name = "protobuf-parse"
-version = "3.5.1"
+name = "powerfmt"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b0e9b447d099ae2c4993c0cbb03c7a9d6c937b17f2d56cfc0b1550e6fcfdb76"
-dependencies = [
- "anyhow",
- "indexmap",
- "log",
- "protobuf",
- "protobuf-support",
- "tempfile",
- "thiserror",
- "which",
-]
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
 [[package]]
-name = "protobuf-support"
-version = "3.5.1"
+name = "proc-macro2"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0766e3675a627c327e4b3964582594b0e8741305d628a98a5de75a1d15f99b9"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
 dependencies = [
- "thiserror",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -506,35 +364,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "640c9bd8497b02465aeef5375144c26062e0dcd5939dfcbb0f5db76cb8c17c73"
 
 [[package]]
-name = "regex"
-version = "1.10.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4219d74c6b67a3654a9fbebc4b419e22126d13d2f3c4a07ee0cb61ff79a79619"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-automata",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-automata"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38caf58cc5ef2fed281f89292ef23f6365465ed9a41b7a7754eb4e26496c92df"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b"
-
-[[package]]
 name = "rustix"
 version = "0.38.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -548,23 +377,41 @@ dependencies = [
 ]
 
 [[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
+[[package]]
 name = "serde"
-version = "1.0.209"
+version = "1.0.215"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99fce0ffe7310761ca6bf9faf5115afbc19688edd00171d81b1bb1b116c63e09"
+checksum = "6513c1ad0b11a9376da888e3e0baa0077f1aed55c17f50e7b2397136129fb88f"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.209"
+version = "1.0.215"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5831b979fd7b5439637af1752d535ff49f4860c0f341d1baeb6faf0f4242170"
+checksum = "ad1e866f866923f252f05c889987993144fb74e722403468a4ebd70c3cd756c0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.87",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.133"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7fceb2473b9166b2294ef05efcb65a3db80803f0b03ef86a5fc88a2b85ee377"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
 ]
 
 [[package]]
@@ -585,16 +432,21 @@ dependencies = [
 ]
 
 [[package]]
-name = "strsim"
-version = "0.11.1"
+name = "syn"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
 
 [[package]]
 name = "syn"
-version = "2.0.77"
+version = "2.0.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
+checksum = "25aa4ce346d03a6dcd68dd8b4010bcb74e54e62c90c573f394c46eae99aba32d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -607,7 +459,7 @@ version = "3.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04cbcdd0c794ebb0d4cf35e88edd2f7d2c4c3e9a5a6dab322839b321c6a87a64"
 dependencies = [
- "cfg-if",
+ "cfg-if 1.0.0",
  "fastrand",
  "once_cell",
  "rustix",
@@ -624,26 +476,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "thiserror"
-version = "1.0.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0342370b38b6a11b6cc11d6a805569958d54cfa061a29969c3b5ce2ea405724"
-dependencies = [
- "thiserror-impl",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "1.0.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4558b58466b9ad7ca0f102865eccc95938dca1a74a856f2b57b6629050da261"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
 name = "time"
 version = "0.3.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -677,16 +509,78 @@ dependencies = [
 ]
 
 [[package]]
+name = "uds_windows"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89daebc3e6fd160ac4aa9fc8b3bf71e1f74fbf92367ae71fb83a037e8bf164b9"
+dependencies = [
+ "memoffset",
+ "tempfile",
+ "winapi",
+]
+
+[[package]]
 name = "unicode-ident"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
-name = "utf8parse"
-version = "0.2.2"
+name = "unicode-width"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
+
+[[package]]
+name = "unix_socket"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6aa2700417c405c38f5e6902d699345241c28c0b7ade4abaad71e35a87eb1564"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc",
+]
+
+[[package]]
+name = "varlink"
+version = "11.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "409e275987d74665c23610c0959c133360cafd761c1a6ddb1ca6d0685c8cef5d"
+dependencies = [
+ "libc",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tempfile",
+ "uds_windows",
+ "unix_socket",
+ "winapi",
+]
+
+[[package]]
+name = "varlink_generator"
+version = "10.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d8ff746c5b65d4bfb3a50f630b85cfb6a9d59f18720126e3ebd6bc98527fa51"
+dependencies = [
+ "chainerror",
+ "getopts",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "varlink_parser",
+]
+
+[[package]]
+name = "varlink_parser"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35fb9f3c1e8ccb33cdb6c84a4477ef3f3884ce6f4b70514ef1fbf7686eae921e"
+dependencies = [
+ "ansi_term",
+ "chainerror",
+ "peg",
+]
 
 [[package]]
 name = "wasm-bindgen"
@@ -694,7 +588,7 @@ version = "0.2.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a82edfc16a6c469f5f44dc7b571814045d60404b55a0ee849f9bcfa2e63dd9b5"
 dependencies = [
- "cfg-if",
+ "cfg-if 1.0.0",
  "once_cell",
  "wasm-bindgen-macro",
 ]
@@ -710,7 +604,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.87",
  "wasm-bindgen-shared",
 ]
 
@@ -732,7 +626,7 @@ checksum = "afc340c74d9005395cf9dd098506f7f44e38f2b4a21c6aaacf9a105ea5e1e836"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.87",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -744,18 +638,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c62a0a307cb4a311d3a07867860911ca130c3494e8c2719593806c08bc5d0484"
 
 [[package]]
-name = "which"
-version = "4.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
-dependencies = [
- "either",
- "home",
- "once_cell",
- "rustix",
-]
-
-[[package]]
 name = "winapi"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"