release under 3-clause BSD license

LICENSE

@@ -0,0 +1,27 @@
+Copyright (C) 2023 anna <owo@fef.moe>.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software without
+   specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.

src/main.rs

@@ -57,6 +57,10 @@ struct Params {
     /// Shortcut for setting the `Accept` header
     #[arg(short = 'a', long)]
     accept: Option<String>,
+
+    /// Print copyright, warranty, and license information.
+    #[arg(long)]
+    license: bool,
 }
 
 #[derive(Debug, Copy, Clone, PartialEq, ValueEnum)]
@@ -86,7 +90,19 @@ impl From<RequestMethod> for reqwest::Method {
 
 #[tokio::main(flavor = "current_thread")]
 async fn main() {
+    if let Some(arg1) = env::args().nth(1) {
+        if arg1.as_str() == "--license" {
+            print!("{LICENSE}");
+            exit(0);
+        }
+    }
+
     let mut params = Params::parse();
+    if params.license {
+        print!("{LICENSE}");
+        exit(0);
+    }
+
     if params.method == RequestMethod::Options {
         params.headers = true;
     }
@@ -396,3 +412,5 @@ fn isatty(fd: i32) -> bool {
 fn isatty(_: i32) -> bool {
     false
 }
+
+const LICENSE: &str = include_str!("../LICENSE");