generate shell completions during build

.gitignore

@@ -2,3 +2,7 @@
 **/*.rs.bk
 .idea/
 *.iml
+fido2luks.bash
+fido2luks.elv
+fido2luks.fish
+fido2luks.zsh

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fido2luks"
-version = "0.2.13"
+version = "0.2.14"
 authors = ["shimunn <[email protected]>"]
 edition = "2018"
 
@@ -25,6 +25,15 @@ serde_json = "1.0.51"
 serde_derive = "1.0.106"
 serde = "1.0.106"
 
+[build-dependencies]
+ctap_hmac = { version="0.4.2", features = ["request_multiple"] }
+hex = "0.3.2"
+ring = "0.13.5"
+failure = "0.1.5"
+rpassword = "4.0.1"
+libcryptsetup-rs = "0.4.1"
+structopt = "0.3.2"
+
 [profile.release]
 lto = true
 opt-level = 'z'
@@ -38,6 +47,7 @@ build-depends = "libclang-dev, libcryptsetup-dev"
 extended-description = "Decrypt your LUKS partition using a FIDO2 compatible authenticator"
 assets = [
     ["target/release/fido2luks", "usr/bin/", "755"],
+    ["fido2luks.bash", "usr/share/bash-completion/completions/fido2luks", "644"],
     ["initramfs-tools/keyscript.sh", "/lib/cryptsetup/scripts/fido2luks", "755" ],
     ["initramfs-tools/hook/fido2luks.sh", "etc/initramfs-tools/hooks/", "755" ],
     ["initramfs-tools/fido2luks.conf", "etc/", "644"],

PKGBUILD

@@ -17,10 +17,9 @@ pkgver() {
 
 build() {
     cargo build --release --locked --all-features --target-dir=target
-    ./target/release/fido2luks completions bash target
 }
 
 package() {
     install -Dm 755 target/release/${pkgname} -t "${pkgdir}/usr/bin"
-    install -Dm 644 target/fido2luks.bash "${pkgdir}/usr/share/bash-completion/completions/fido2luks"
+    install -Dm 644 fido2luks.bash "${pkgdir}/usr/share/bash-completion/completions/fido2luks"
 }

build.rs

@@ -0,0 +1,24 @@
+#![allow(warnings)]
+#[macro_use]
+extern crate failure;
+extern crate ctap_hmac as ctap;
+
+#[path = "src/cli_args/mod.rs"]
+mod cli_args;
+#[path = "src/error.rs"]
+mod error;
+#[path = "src/util.rs"]
+mod util;
+
+use cli_args::Args;
+use std::env;
+use std::str::FromStr;
+use structopt::clap::Shell;
+use structopt::StructOpt;
+
+fn main() {
+    // generate completion scripts, zsh does panic for some reason
+    for shell in Shell::variants().iter().filter(|shell| **shell != "zsh") {
+        Args::clap().gen_completions(env!("CARGO_PKG_NAME"), Shell::from_str(shell).unwrap(), ".");
+    }
+}