Initial commit

backend/build.rs

@@ -0,0 +1,123 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+use regex::escape;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+struct CaseSuite {
+    cases: Vec<CaseName>,
+}
+
+#[derive(Deserialize)]
+struct CaseName {
+    name: String,
+}
+
+#[derive(Deserialize)]
+struct MonthSuite {
+    months: Vec<MonthDefinition>,
+}
+
+#[derive(Deserialize)]
+struct MonthDefinition {
+    name: String,
+    month: u32,
+    #[serde(default)]
+    locales: Vec<String>,
+}
+
+fn sanitize(name: &str) -> String {
+    let mut out = String::with_capacity(name.len());
+    for ch in name.chars() {
+        if ch.is_ascii_alphanumeric() {
+            out.push(ch);
+        } else {
+            out.push('_');
+        }
+    }
+    if out.is_empty() {
+        "case".to_string()
+    } else if out.chars().next().unwrap().is_ascii_digit() {
+        format!("_{}", out)
+    } else {
+        out
+    }
+}
+
+fn quote(value: &str) -> String {
+    serde_json::to_string(value).expect("string literal")
+}
+
+fn generate_tests() -> Result<String, Box<dyn std::error::Error>> {
+    let yaml_path = PathBuf::from("tests/data/issued_at_cases.yaml");
+    let contents = fs::read_to_string(&yaml_path)?;
+    let suite: CaseSuite = serde_yaml::from_str(&contents)?;
+
+    let mut output =
+        String::from("#[cfg(test)]\npub mod issued_at_generated_tests {\n    use super::*;\n");
+
+    for case in suite.cases {
+        let ident = sanitize(&case.name);
+        output.push_str(&format!(
+            "    #[test]\n    fn {}() {{\n        run_named_case(\"{}\");\n    }}\n",
+            ident, case.name
+        ));
+    }
+
+    output.push_str("}\n");
+    Ok(output)
+}
+
+fn generate_months() -> Result<String, Box<dyn std::error::Error>> {
+    let yaml_path = PathBuf::from("resources/issued_at_months.yaml");
+    let contents = fs::read_to_string(&yaml_path)?;
+    let suite: MonthSuite = serde_yaml::from_str(&contents)?;
+
+    let mut pattern_parts = Vec::with_capacity(suite.months.len());
+    let mut entries = String::new();
+    for entry in &suite.months {
+        pattern_parts.push(escape(&entry.name));
+        let locales_literal = if entry.locales.is_empty() {
+            "&[]".to_string()
+        } else {
+            let joined = entry
+                .locales
+                .iter()
+                .map(|loc| quote(loc))
+                .collect::<Vec<_>>()
+                .join(", ");
+            format!("&[{}]", joined)
+        };
+        entries.push_str(&format!(
+            "    MonthVariant {{ name: {}, month: {}, locales: {} }},\n",
+            quote(&entry.name),
+            entry.month,
+            locales_literal
+        ));
+    }
+
+    let pattern_literal = quote(&pattern_parts.join("|"));
+    let output = format!(
+        "pub(super) static MONTH_VARIANTS: &[MonthVariant] = &[\n{entries}];\n\n",
+        entries = entries
+    ) + &format!(
+        "pub(super) const MONTH_PATTERN: &str = {};\n",
+        pattern_literal
+    );
+    Ok(output)
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    println!("cargo:rerun-if-changed=tests/data/issued_at_cases.yaml");
+    println!("cargo:rerun-if-changed=resources/issued_at_months.yaml");
+
+    let out_dir = PathBuf::from(env::var("OUT_DIR")?);
+    fs::write(
+        out_dir.join("issued_at_generated_tests.rs"),
+        generate_tests()?,
+    )?;
+    fs::write(out_dir.join("issued_at_months.rs"), generate_months()?)?;
+    Ok(())
+}