From: Thomas Karpiniec <tom.karpiniec@outlook.com>
Date: Tue, 21 Jan 2020 06:55:45 +0000 (+1100)
Subject: Make clipboard functionality an optional feature
X-Git-Tag: v0.2.0~9
X-Git-Url: https://code.octet-stream.net/hashgood/commitdiff_plain/a81302dca6183729495f32f396e4f7a793b89e96

Make clipboard functionality an optional feature
---

diff --git a/Cargo.toml b/Cargo.toml
index 1f68f35..4075cee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,5 +10,11 @@ hex = "0.4.0"
 rust-crypto = "0.2.36"
 crossbeam-channel = "0.4.0"
 termcolor = "1.0.5"
-clipboard = "0.5.0"
 regex = "1"
+
+[dependencies.clipboard]
+version = "0.5.0"
+optional = true
+
+[features]
+paste = ["clipboard"]
diff --git a/src/main.rs b/src/main.rs
index 2f1e7f3..a82c40a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,6 +16,7 @@ mod verify;
 #[structopt(name = "hashgood")]
 pub struct Opt {
     /// Read the hash from the clipboard
+    #[cfg(feature = "paste")]
     #[structopt(short = "p", long = "paste")]
     paste: bool,
 
@@ -36,6 +37,17 @@ pub struct Opt {
     hash: Option<String>,
 }
 
+impl Opt {
+    fn get_paste(&self) -> bool {
+        #[cfg(feature = "paste")] {
+            return self.paste;
+        }
+        #[cfg(not(feature = "paste"))] {
+            return false;
+        }
+    }
+}
+
 /// Types of supported digest algorithm
 #[derive(Debug, PartialEq, Copy, Clone)]
 pub enum Algorithm {
@@ -179,12 +191,12 @@ fn hashgood() -> Result<(), Box<dyn Error>> {
 fn get_verified_options() -> Result<Opt, String> {
     let opt = Opt::from_args();
     let hash_methods =
-        opt.hash.is_some() as i32 + opt.paste as i32 + opt.hash_file.is_some() as i32;
+        opt.hash.is_some() as i32 + opt.get_paste() as i32 + opt.hash_file.is_some() as i32;
     if hash_methods > 1 {
         if opt.hash.is_some() {
             eprintln!("* specified as command line argument");
         }
-        if opt.paste {
+        if opt.get_paste() {
             eprintln!("* paste from clipboard (-p)")
         }
         if opt.hash_file.is_some() {
diff --git a/src/verify.rs b/src/verify.rs
index 6ad9ea9..f5ba2a2 100644
--- a/src/verify.rs
+++ b/src/verify.rs
@@ -2,8 +2,8 @@ use super::{
     Algorithm, CandidateHash, CandidateHashes, Hash, MatchLevel, MessageLevel, Opt, Verification,
     VerificationSource,
 };
-use clipboard::ClipboardContext;
-use clipboard::ClipboardProvider;
+#[cfg(feature = "paste")]
+use clipboard::{ClipboardContext, ClipboardProvider};
 use regex::Regex;
 use std::fs::File;
 use std::io;
@@ -17,7 +17,7 @@ use std::path::PathBuf;
 pub fn get_candidate_hashes(opt: &Opt) -> Result<Option<CandidateHashes>, String> {
     if let Some(hash_string) = &opt.hash {
         return Ok(Some(get_by_parameter(hash_string)?));
-    } else if opt.paste {
+    } else if opt.get_paste() {
         return Ok(Some(get_from_clipboard()?));
     } else if let Some(hash_file) = &opt.hash_file {
         return Ok(Some(get_from_file(hash_file)?));
@@ -43,28 +43,33 @@ fn get_by_parameter(param: &str) -> Result<CandidateHashes, String> {
 
 /// Generate a candidate hash from the system clipboard, or throw an error.
 fn get_from_clipboard() -> Result<CandidateHashes, String> {
-    let mut ctx: ClipboardContext = match ClipboardProvider::new() {
-        Ok(ctx) => ctx,
-        Err(e) => return Err(format!("Error getting system clipboard: {}", e)),
-    };
-
-    let possible_hash = match ctx.get_contents() {
-        Ok(value) => value,
-        Err(e) => format!("Error reading from clipboard: {}", e),
-    };
-
-    let bytes = hex::decode(&possible_hash)
-        .map_err(|_| "Clipboard contains invalid or truncated hex".to_owned())?;
-    let alg = Algorithm::from_len(bytes.len())?;
-    let candidate = CandidateHash {
-        filename: None,
-        bytes,
-    };
-    Ok(CandidateHashes {
-        alg,
-        hashes: vec![candidate],
-        source: VerificationSource::Clipboard,
-    })
+    #[cfg(feature = "paste")] {
+        let mut ctx: ClipboardContext = match ClipboardProvider::new() {
+            Ok(ctx) => ctx,
+            Err(e) => return Err(format!("Error getting system clipboard: {}", e)),
+        };
+    
+        let possible_hash = match ctx.get_contents() {
+            Ok(value) => value,
+            Err(e) => format!("Error reading from clipboard: {}", e),
+        };
+    
+        let bytes = hex::decode(&possible_hash)
+            .map_err(|_| "Clipboard contains invalid or truncated hex".to_owned())?;
+        let alg = Algorithm::from_len(bytes.len())?;
+        let candidate = CandidateHash {
+            filename: None,
+            bytes,
+        };
+        return Ok(CandidateHashes {
+            alg,
+            hashes: vec![candidate],
+            source: VerificationSource::Clipboard,
+        });
+    }
+    #[cfg(not(feature = "paste"))] {
+        return Err("Paste not implemented".to_owned());
+    }
 }
 
 /// Generate a candidate hash from the digests file specified (could be "-" for STDIN), or throw an error.