Make entropy plot an optional feature

Cargo.toml

@@ -9,12 +9,16 @@ repository = "https://github.com/ReFirmLabs/binwalk"
 description = "Analyzes data for embedded file types"
 keywords = ["binwalk", "firmware", "analysis"]
 
+[features]
+default = []
+entropy-plot = ["dep:plotly", "dep:entropy"]
+
 [dependencies]
 log = "0.4.22"
 base64 = "0.22.1"
 chrono = "0.4.38"
 walkdir = "2.5.0"
-entropy = "0.4.2"
+entropy = { version = "0.4.2", optional = true }
 colored = "3.0.0"
 termsize = "0.1"
 crc32-v2 = "0.0.5"
@@ -34,7 +38,10 @@ clap = { version = "4.5.16", features = ["derive"] }
 xxhash-rust = { version = "0.8.12", features = ["xxh32"] }
 hex = "0.4.3"
 delink = { git = "https://github.com/devttys0/delink" }
-plotly = { version = "0.13.1", features = ["kaleido", "kaleido_download"] }
+plotly = { version = "0.14", features = [
+    "kaleido",
+    "kaleido_download",
+], optional = true }
 
 [dependencies.uuid]
 version = "1.17.0"

src/display.rs

@@ -393,6 +393,7 @@ pub fn print_plain(quiet: bool, msg: &str) {
     }
 }
 
+#[cfg(feature = "entropy-plot")]
 pub fn println_plain(quiet: bool, msg: &str) {
     if !quiet {
         println!("{msg}");

src/json.rs

@@ -7,6 +7,7 @@ use std::io::Write;
 
 use crate::binwalk::AnalysisResults;
 use crate::display;
+#[cfg(feature = "entropy-plot")]
 use crate::entropy::FileEntropy;
 
 const STDOUT: &str = "-";
@@ -16,6 +17,7 @@ const JSON_LIST_SEP: &str = ",\n";
 
 #[derive(Debug, Serialize, Deserialize)]
 pub enum JSONType {
+    #[cfg(feature = "entropy-plot")]
     Entropy(FileEntropy),
     Analysis(AnalysisResults),
 }

src/main.rs

@@ -13,6 +13,7 @@ mod binwalk;
 mod cliparser;
 mod common;
 mod display;
+#[cfg(feature = "entropy-plot")]
 mod entropy;
 mod extractors;
 mod json;
@@ -71,21 +72,30 @@ fn main() -> ExitCode {
 
     // If entropy analysis was requested, generate the entropy graph and return
     if cliargs.entropy {
-        display::print_plain(cliargs.quiet, "Calculating file entropy...");
-
-        if let Ok(entropy_results) =
-            entropy::plot(cliargs.file_name.unwrap(), cliargs.stdin, cliargs.png)
+        #[cfg(not(feature = "entropy-plot"))]
         {
-            // Log entropy results to JSON file, if requested
-            json_logger.log(json::JSONType::Entropy(entropy_results.clone()));
-            json_logger.close();
-
-            display::println_plain(cliargs.quiet, "done.");
-        } else {
-            panic!("Entropy analysis failed!");
+            panic!(
+                "binwalk was built without the \"entropy-plot\" feature, entropy analysis isn't available"
+            );
         }
+        #[cfg(feature = "entropy-plot")]
+        {
+            display::print_plain(cliargs.quiet, "Calculating file entropy...");
+
+            if let Ok(entropy_results) =
+                entropy::plot(cliargs.file_name.unwrap(), cliargs.stdin, cliargs.png)
+            {
+                // Log entropy results to JSON file, if requested
+                json_logger.log(json::JSONType::Entropy(entropy_results.clone()));
+                json_logger.close();
+
+                display::println_plain(cliargs.quiet, "done.");
+            } else {
+                panic!("Entropy analysis failed!");
+            }
 
-        return ExitCode::SUCCESS;
+            return ExitCode::SUCCESS;
+        }
     }
 
     // If extraction or data carving was requested, we need to initialize the output directory