Support composing messages in an external editor (#155)

Cargo.lock

@@ -253,9 +253,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.0.2"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "487f1e0fcbe47deb8b0574e646def1c903389d95241dd1bbcc6ce4a715dfc0c1"
+checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
 
 [[package]]
 name = "blake3"
@@ -420,7 +420,7 @@ version = "4.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "76e21918af71fb4bcd813230cf549e33d14f73d0326b932b630ce2930332b131"
 dependencies = [
- "bitflags 2.0.2",
+ "bitflags 2.4.0",
  "clap_derive",
  "clap_lex",
  "is-terminal",
@@ -961,6 +961,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "edit"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c562aa71f7bc691fde4c6bf5f93ae5a5298b617c2eb44c76c87832299a17fbb4"
+dependencies = [
+ "tempfile",
+ "which",
+]
+
 [[package]]
 name = "either"
 version = "1.8.1"
@@ -1010,13 +1020,13 @@ dependencies = [
 
 [[package]]
 name = "errno"
-version = "0.3.0"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50d6a0976c999d473fe89ad888d5a284e55366d9dc9038b1ba2aa15128c4afa0"
+checksum = "136526188508e25c6fef639d7927dfb3e0e3084488bf202267829cf7fc23dbdd"
 dependencies = [
  "errno-dragonfly",
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1071,6 +1081,12 @@ dependencies = [
  "regex",
 ]
 
+[[package]]
+name = "fastrand"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6999dc1837253364c2ebb0704ba97994bd874e8f195d665c50b7548f6ea92764"
+
 [[package]]
 name = "flate2"
 version = "1.0.25"
@@ -1431,6 +1447,15 @@ dependencies = [
  "digest 0.10.6",
 ]
 
+[[package]]
+name = "home"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
+dependencies = [
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "html5ever"
 version = "0.26.0"
@@ -1518,7 +1543,7 @@ dependencies = [
 
 [[package]]
 name = "iamb"
-version = "0.0.8"
+version = "0.0.9-alpha.1"
 dependencies = [
  "arboard",
  "bitflags 1.3.2",
@@ -1527,6 +1552,7 @@ dependencies = [
  "comrak",
  "css-color-parser",
  "dirs",
+ "edit",
  "emojis",
  "futures",
  "gethostname 0.4.1",
@@ -1772,9 +1798,9 @@ checksum = "03087c2bad5e1034e8cace5926dec053fb3790248370865f5117a7d0213354c8"
 
 [[package]]
 name = "libc"
-version = "0.2.140"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
 [[package]]
 name = "line-wrap"
@@ -1812,6 +1838,12 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d59d8c75012853d2e872fb56bc8a2e53718e2cafe1a4c823143141c6d90c322f"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a9bad9f94746442c783ca431b22403b519cd7fbeed0533fdd6328b2f2212128"
+
 [[package]]
 name = "lock_api"
 version = "0.4.9"
@@ -2379,7 +2411,7 @@ dependencies = [
  "cfg-if",
  "instant",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "smallvec",
  "winapi",
 ]
@@ -2392,7 +2424,7 @@ checksum = "9069cbb9f99e3a5083476ccb29ceb1de18b9118cafa53e90c9551235de2b9521"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "smallvec",
  "windows-sys 0.45.0",
 ]
@@ -2925,6 +2957,15 @@ dependencies = [
  "bitflags 1.3.2",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
+dependencies = [
+ "bitflags 1.3.2",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.4.3"
@@ -2932,7 +2973,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
 dependencies = [
  "getrandom 0.2.8",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "thiserror",
 ]
 
@@ -3167,13 +3208,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2aae838e49b3d63e9274e1c01833cc8139d3fec468c3b84688c628f44b1ae11d"
 dependencies = [
  "bitflags 1.3.2",
- "errno 0.3.0",
+ "errno 0.3.3",
  "io-lifetimes",
  "libc",
  "linux-raw-sys 0.3.1",
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.38.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdf14a7a466ce88b5eac3da815b53aefc208ce7e74d1c263aabb04d88c4abeb1"
+dependencies = [
+ "bitflags 2.4.0",
+ "errno 0.3.3",
+ "libc",
+ "linux-raw-sys 0.4.7",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "rustls"
 version = "0.20.8"
@@ -3594,6 +3648,19 @@ dependencies = [
  "yaml-rust",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb94d2f3cc536af71caac6b6fcebf65860b347e7ce0cc9ebe8f70d3e521054ef"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "redox_syscall 0.3.5",
+ "rustix 0.38.12",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "tendril"
 version = "0.4.3"
@@ -4238,6 +4305,18 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9193164d4de03a926d909d3bc7c30543cecb35400c02114792c2cae20d5e2dbb"
 
+[[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 0.38.12",
+]
+
 [[package]]
 name = "wildmatch"
 version = "2.1.1"