add no-sanbox arg to Kaleido process

 - something fishy is happening in the CI, without this argument
   empty files are generated because of chromium security issues
 - print stderr of Kaleido to console

Signed-off-by: Andrei Gherghescu <[email protected]>

examples/kaleido/Cargo.toml

@@ -9,4 +9,3 @@ edition = "2021"
 
 [dependencies]
 plotly = { path = "../../plotly", features = ["kaleido", "kaleido_fetch"] }
-# plotly = { path = "../../plotly", features = ["kaleido"] }

plotly/src/plot.rs

@@ -585,6 +585,7 @@ impl PartialEq for Plot {
 mod tests {
     use std::path::PathBuf;
 
+    use base64::{engine::general_purpose, Engine as _};
     use serde_json::{json, to_value};
 
     use super::*;
@@ -748,7 +749,7 @@ mod tests {
         assert!(!dst.exists());
     }
 
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     #[cfg(feature = "kaleido")]
     fn test_save_to_png() {
@@ -760,7 +761,7 @@ mod tests {
         assert!(!dst.exists());
     }
 
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     #[cfg(feature = "kaleido")]
     fn test_save_to_jpeg() {
@@ -772,7 +773,7 @@ mod tests {
         assert!(!dst.exists());
     }
 
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     #[cfg(feature = "kaleido")]
     fn test_save_to_svg() {
@@ -796,7 +797,7 @@ mod tests {
         assert!(!dst.exists());
     }
 
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     #[cfg(feature = "kaleido")]
     fn test_save_to_pdf() {
@@ -820,12 +821,10 @@ mod tests {
         assert!(!dst.exists());
     }
 
-    #[cfg(target_os = "linux")]
     #[test]
+    #[cfg(not(target_os = "macos"))]
     #[cfg(feature = "kaleido")]
     fn test_image_to_base64() {
-        use base64::engine::general_purpose;
-        use base64::Engine;
         let plot = create_test_plot();
 
         let image_base64 = plot.to_base64(ImageFormat::PNG, 200, 150, 1.0);
@@ -850,8 +849,8 @@ mod tests {
         assert!(image_base64.is_empty());
     }
 
-    #[cfg(target_os = "linux")]
     #[test]
+    #[cfg(not(target_os = "macos"))]
     #[cfg(feature = "kaleido")]
     fn test_image_to_svg_string() {
         let plot = create_test_plot();

plotly_kaleido/build.rs

@@ -141,7 +141,8 @@ fn main() -> Result<()> {
 
         extract_zip(&dst, &kaleido_zip_file)?;
     } else {
-        println!("'download' feature disabled. Kaleido binary won't be downloaded and must be installed manually.")
+        let msg = "'download' feature disabled. Please install Kaleido manually and make the environment variable 'KALEIDO_PATH' point to it.".to_string();
+        println!("cargo::warning={msg}");
     }
     Ok(())
 }

plotly_kaleido/src/lib.rs

@@ -197,6 +197,8 @@ impl Kaleido {
                 "--disable-dev-shm-usage",
                 "--disable-software-rasterizer",
                 "--single-process",
+                "--disable-gpu",
+                "--no-sandbox",
             ])
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
@@ -225,16 +227,29 @@ impl Kaleido {
         let output_lines = BufReader::new(process.stdout.take().unwrap()).lines();
         for line in output_lines.map_while(Result::ok) {
             let res = KaleidoResult::from(line.as_str());
-            if let Some(image_data) = res.result {
-                // TODO: this should be refactored
-                // The assumption is that  KaleidoResult contains a single image.
-                // We should end the loop on the first valid one.
-                // If that is not the case, prior implementation would have returned the last
-                // valid image
-                return Ok(image_data);
+            match res.result {
+                Some(image_data) => {
+                    // TODO: this should be refactored
+                    // The assumption is that  KaleidoResult contains a single image.
+                    // We should end the loop on the first valid one.
+                    // If that is not the case, prior implementation would have returned the last
+                    // valid image
+                    return Ok(image_data);
+                }
+                None => {
+                    println!("empty line from Kaleido stdout");
+                }
             }
         }
 
+        // Don't eat up Kaleido/Chromiu erros but show them in the terminal
+        let stderr = process.stderr.take().unwrap();
+        let stderr_lines = BufReader::new(stderr).lines();
+        for line in stderr_lines {
+            let line = line.unwrap();
+            eprintln!("{}", line);
+        }
+
         Ok(String::default())
     }
 }
@@ -297,7 +312,7 @@ mod tests {
     }
 
     // This seems to fail unpredictably on MacOs.
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn test_save_png() {
         let test_plot = create_test_plot();
@@ -309,7 +324,7 @@ mod tests {
     }
 
     // This seems to fail unpredictably on MacOs.
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn test_save_jpeg() {
         let test_plot = create_test_plot();
@@ -321,7 +336,7 @@ mod tests {
     }
 
     // This seems to fail unpredictably on MacOs.
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn test_save_webp() {
         let test_plot = create_test_plot();
@@ -333,7 +348,7 @@ mod tests {
     }
 
     // This seems to fail unpredictably on MacOs.
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn test_save_svg() {
         let test_plot = create_test_plot();
@@ -345,7 +360,7 @@ mod tests {
     }
 
     // This seems to fail unpredictably on MacOs.
-    #[cfg(target_os = "linux")]
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn test_save_pdf() {
         let test_plot = create_test_plot();