v0.34.9_css_refactor

build.rs

@@ -1,6 +1,53 @@
 use serde_json::{json, Value};
 use std::{collections::HashSet, env, fs, path::PathBuf, process::Command};
 
+fn panel_styles(
+    root: &std::path::Path,
+    out: &std::path::Path,
+) -> Result<(), Box<dyn std::error::Error>> {
+    println!("cargo:rerun-if-env-changed=RUST_PROXY_PYTHON");
+    let helper = root.join("scripts/build/panel_css.py");
+    println!("cargo:rerun-if-changed={}", helper.display());
+    println!("cargo:rerun-if-changed={}", root.join("src/admin/web/css").display());
+    let interpreters = match env::var_os("RUST_PROXY_PYTHON") {
+        Some(value) if !value.is_empty() => vec![value],
+        _ => vec!["python3".into(), "python".into()],
+    };
+    for interpreter in interpreters {
+        match Command::new(&interpreter)
+            .arg(&helper)
+            .arg("--root")
+            .arg(root)
+            .arg("--out-dir")
+            .arg(out)
+            .arg("--cargo")
+            .status()
+        {
+            Ok(status) if status.success() => {
+                let generated = out.join("panel-style.css");
+                let metadata = fs::metadata(&generated).map_err(|error| {
+                    format!(
+                        "Panel CSS helper succeeded but {} is unavailable: {error}",
+                        generated.display()
+                    )
+                })?;
+                if !metadata.is_file() || metadata.len() == 0 {
+                    return Err(format!(
+                        "Panel CSS helper did not create a non-empty regular file: {}",
+                        generated.display()
+                    )
+                    .into());
+                }
+                return Ok(());
+            }
+            Ok(_) => return Err("Panel CSS preparation failed; see the diagnostic above and src/admin/web/css/README.md".into()),
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => continue,
+            Err(error) => return Err(error.into()),
+        }
+    }
+    Err("Python 3.10+ is required for build assets; install python3 or set RUST_PROXY_PYTHON to its executable".into())
+}
+
 fn swagger_assets(
     root: &std::path::Path,
     out: &std::path::Path,
@@ -35,6 +82,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         env::var_os("CARGO_MANIFEST_DIR").ok_or("Cargo did not supply CARGO_MANIFEST_DIR")?,
     );
     let out = PathBuf::from(env::var_os("OUT_DIR").ok_or("Cargo did not supply OUT_DIR")?);
+    panel_styles(&root, &out)?;
     swagger_assets(&root, &out)?;
     let langs = root.join("langs");
     println!("cargo:rerun-if-changed={}", langs.display());