Add SLoC (Source Lines of Code) metric to versions

Cargo.toml

@@ -71,6 +71,7 @@ crates_io_docs_rs = { path = "crates/crates_io_docs_rs" }
 crates_io_env_vars = { path = "crates/crates_io_env_vars" }
 crates_io_github = { path = "crates/crates_io_github" }
 crates_io_index = { path = "crates/crates_io_index" }
+crates_io_linecount = { path = "crates/crates_io_linecount" }
 crates_io_markdown = { path = "crates/crates_io_markdown" }
 crates_io_og_image = "=0.2.1"
 crates_io_pagerduty = { path = "crates/crates_io_pagerduty" }

crates/crates_io_database/src/models/version.rs

@@ -36,6 +36,7 @@ pub struct Version {
     pub documentation: Option<String>,
     pub repository: Option<String>,
     pub trustpub_data: Option<TrustpubData>,
+    pub linecounts: Option<serde_json::Value>,
 }
 
 impl Version {
@@ -109,6 +110,7 @@ pub struct NewVersion<'a> {
     categories: Option<&'a [&'a str]>,
     keywords: Option<&'a [&'a str]>,
     trustpub_data: Option<&'a TrustpubData>,
+    linecounts: Option<serde_json::Value>,
 }
 
 impl NewVersion<'_> {

crates/crates_io_database/src/schema.rs

@@ -1089,6 +1089,8 @@ diesel::table! {
         semver_ord -> Nullable<Jsonb>,
         /// JSONB data containing JWT claims from the trusted publisher (e.g., GitHub Actions context like repository, run_id, sha)
         trustpub_data -> Nullable<Jsonb>,
+        /// Source Lines of Code statistics for this version, stored as JSON with language breakdown and totals.
+        linecounts -> Nullable<Jsonb>,
     }
 }
 

crates/crates_io_database_dump/src/dump-db.toml

@@ -288,6 +288,8 @@ categories = "public"
 keywords = "public"
 # The following column is private for now, until we can guarantee a stable data schema.
 trustpub_data = "private"
+# The following column is private for now, until we can guarantee a stable data schema.
+linecounts = "private"
 
 [versions_published_by.columns]
 version_id = "private"

crates/crates_io_linecount/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "crates_io_linecount"
+version = "0.0.0"
+description = "Lines of code counting for crates.io using tokei"
+license = "MIT OR Apache-2.0"
+edition = "2024"
+
+[lints]
+workspace = true
+
+[dependencies]
+serde = { version = "=1.0.223", features = ["derive"] }
+tokei = "=13.0.0-alpha.9"
+
+[dev-dependencies]
+claims = "=0.8.0"
+insta = { version = "=1.43.2", features = ["json"] }

crates/crates_io_linecount/src/languages.rs

@@ -0,0 +1,62 @@
+use tokei::LanguageType;
+
+/// Determine if a language should be counted or ignored
+pub fn should_ignore_language(lang: LanguageType) -> bool {
+    matches!(
+        lang,
+        // Configuration and data files
+        LanguageType::Json |
+        LanguageType::Yaml |
+        LanguageType::Toml |
+        LanguageType::Xml |
+        LanguageType::Ini |
+
+        // Documentation
+        LanguageType::Markdown |
+        LanguageType::Text |
+        LanguageType::ReStructuredText |
+        LanguageType::AsciiDoc |
+        LanguageType::Org |
+
+        // Build system files
+        LanguageType::Makefile |
+        LanguageType::CMake |
+        LanguageType::Dockerfile |
+        LanguageType::Autoconf |
+        LanguageType::MsBuild |
+        LanguageType::Meson |
+        LanguageType::Scons |
+        LanguageType::Bazel |
+        LanguageType::Nix |
+
+        // Shell scripts (debatable, but often just build/deploy automation)
+        LanguageType::Batch |
+        LanguageType::PowerShell |
+
+        // Other non-programming files
+        LanguageType::Svg |
+        LanguageType::Hex |
+        LanguageType::Protobuf |
+        LanguageType::Thrift
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_should_ignore_language() {
+        // Should count programming languages
+        assert!(!should_ignore_language(LanguageType::Rust));
+        assert!(!should_ignore_language(LanguageType::JavaScript));
+        assert!(!should_ignore_language(LanguageType::Html));
+        assert!(!should_ignore_language(LanguageType::Css));
+
+        // Should skip config/data files
+        assert!(should_ignore_language(LanguageType::Json));
+        assert!(should_ignore_language(LanguageType::Yaml));
+        assert!(should_ignore_language(LanguageType::Toml));
+        assert!(should_ignore_language(LanguageType::Markdown));
+    }
+}

crates/crates_io_linecount/src/lib.rs

@@ -0,0 +1,143 @@
+mod languages;
+mod paths;
+
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::sync::LazyLock;
+use tokei::Config;
+
+pub use crate::paths::PathDetails;
+
+// Re-export LanguageType for use by other crates
+pub use tokei::LanguageType;
+
+/// Tokei configuration used for analysis (cached)
+static TOKEI_CONFIG: LazyLock<Config> = LazyLock::new(|| Config {
+    no_ignore: Some(true),
+    treat_doc_strings_as_comments: Some(true),
+    ..Default::default()
+});
+
+/// Statistics for a single programming language
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Default)]
+pub struct LanguageStats {
+    /// Number of lines of code (excluding comments and blank lines)
+    pub code_lines: usize,
+    /// Number of comment lines
+    pub comment_lines: usize,
+    /// Number of files of this language
+    pub files: usize,
+}
+
+/// Complete line count statistics for a crate
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Default)]
+pub struct LinecountStats {
+    /// Per-language breakdown of line counts
+    pub languages: HashMap<LanguageType, LanguageStats>,
+    /// Total lines of code across all languages
+    pub total_code_lines: usize,
+    /// Total comment lines across all languages
+    pub total_comment_lines: usize,
+}
+
+impl LinecountStats {
+    /// Create a new empty statistics collection
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Add a single file to the statistics
+    ///
+    /// The caller can use `should_count_path()` to check if a file should be processed
+    /// before decompressing to avoid unnecessary work.
+    pub fn add_file(&mut self, language_type: LanguageType, content: &[u8]) {
+        let file_stats = language_type.parse_from_slice(content, &TOKEI_CONFIG);
+
+        // Update language-specific stats
+        let entry = self.languages.entry(language_type).or_default();
+        entry.code_lines += file_stats.code;
+        entry.comment_lines += file_stats.comments;
+        entry.files += 1;
+
+        // Update totals
+        self.total_code_lines += file_stats.code;
+        self.total_comment_lines += file_stats.comments;
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::path::Path;
+
+    #[test]
+    fn test_empty() {
+        let stats = LinecountStats::new();
+        insta::assert_json_snapshot!(stats, @r#"
+        {
+          "languages": {},
+          "total_code_lines": 0,
+          "total_comment_lines": 0
+        }
+        "#);
+    }
+
+    #[test]
+    fn test_add_file() {
+        let mut stats = LinecountStats::new();
+
+        // Add a Rust file
+        let rust_code = b"// This is a comment\nfn main() {\n    println!(\"Hello\");\n}";
+        stats.add_file(LanguageType::Rust, rust_code);
+
+        insta::assert_json_snapshot!(stats, @r#"
+        {
+          "languages": {
+            "Rust": {
+              "code_lines": 3,
+              "comment_lines": 1,
+              "files": 1
+            }
+          },
+          "total_code_lines": 3,
+          "total_comment_lines": 1
+        }
+        "#);
+    }
+
+    #[test]
+    fn test_workflow() {
+        let mut stats = LinecountStats::new();
+
+        let files = [
+            ("src/lib.rs", "pub fn hello() {}"),
+            ("tests/test.rs", "fn test() {}"), // Should be skipped
+            ("README.md", "# Hello"),          // Should be skipped
+        ];
+
+        for (path, content) in files {
+            let path = Path::new(path);
+            let path_details = PathDetails::from_path(path);
+
+            if !path_details.should_ignore()
+                && let Some(language_type) = path_details.language_type()
+            {
+                stats.add_file(language_type, content.as_bytes())
+            };
+        }
+
+        insta::assert_json_snapshot!(stats, @r#"
+        {
+          "languages": {
+            "Rust": {
+              "code_lines": 1,
+              "comment_lines": 0,
+              "files": 1
+            }
+          },
+          "total_code_lines": 1,
+          "total_comment_lines": 0
+        }
+        "#);
+    }
+}

crates/crates_io_linecount/src/paths.rs

@@ -0,0 +1,74 @@
+use crate::languages::should_ignore_language;
+use std::path::Path;
+use tokei::LanguageType;
+
+#[derive(Debug, Clone, Copy)]
+pub struct PathDetails {
+    is_benchmark: bool,
+    is_example: bool,
+    is_hidden: bool,
+    is_test: bool,
+    language_type: Option<LanguageType>,
+}
+
+impl PathDetails {
+    pub fn from_path(path: &Path) -> Self {
+        let path_str = path.to_string_lossy().to_lowercase();
+
+        let is_benchmark = path_str.contains("benches/") || path_str.contains("benchmark/");
+        let is_example = path_str.contains("examples/");
+        let is_test = path_str.contains("tests/")
+            || path_str.contains("test/")
+            || path_str.contains("testing/");
+
+        let is_hidden = path
+            .file_name()
+            .map(|filename| filename.to_string_lossy().starts_with('.'))
+            .unwrap_or(false);
+
+        let language_type = path
+            .extension()
+            .and_then(|ext| ext.to_str())
+            .and_then(LanguageType::from_file_extension);
+
+        Self {
+            is_benchmark,
+            is_example,
+            is_hidden,
+            is_test,
+            language_type,
+        }
+    }
+
+    /// Determine if the file should be ignored for line counting purposes
+    /// because it is a benchmark, example, hidden, or test file.
+    pub fn should_ignore(&self) -> bool {
+        self.is_benchmark || self.is_example || self.is_hidden || self.is_test
+    }
+
+    /// Get the actual detected language type, even if it should be ignored.
+    pub fn actual_language_type(&self) -> Option<LanguageType> {
+        self.language_type
+    }
+
+    /// Get the detected language type, returning `None` if no language was
+    /// detected or if the language should be ignored (e.g., data files).
+    pub fn language_type(&self) -> Option<LanguageType> {
+        self.language_type.filter(|lt| !should_ignore_language(*lt))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use insta::assert_debug_snapshot;
+
+    #[test]
+    fn test_should_count_path() {
+        assert_debug_snapshot!(PathDetails::from_path(Path::new("src/tests/mod.rs")));
+        assert_debug_snapshot!(PathDetails::from_path(Path::new("tests/integration.rs")));
+        assert_debug_snapshot!(PathDetails::from_path(Path::new("examples/basic.rs")));
+        assert_debug_snapshot!(PathDetails::from_path(Path::new("benches/bench.rs")));
+        assert_debug_snapshot!(PathDetails::from_path(Path::new("src/lib.rs")));
+    }
+}

crates/crates_io_linecount/src/snapshots/crates_io_linecount__paths__tests__should_count_path-2.snap

@@ -0,0 +1,13 @@
+---
+source: crates/crates_io_linecount/src/paths.rs
+expression: "PathDetails::from_path(Path::new(\"tests/integration.rs\"))"
+---
+PathDetails {
+    is_benchmark: false,
+    is_example: false,
+    is_hidden: false,
+    is_test: true,
+    language_type: Some(
+        Rust,
+    ),
+}

crates/crates_io_linecount/src/snapshots/crates_io_linecount__paths__tests__should_count_path-3.snap

@@ -0,0 +1,13 @@
+---
+source: crates/crates_io_linecount/src/paths.rs
+expression: "PathDetails::from_path(Path::new(\"examples/basic.rs\"))"
+---
+PathDetails {
+    is_benchmark: false,
+    is_example: true,
+    is_hidden: false,
+    is_test: false,
+    language_type: Some(
+        Rust,
+    ),
+}

crates/crates_io_linecount/src/snapshots/crates_io_linecount__paths__tests__should_count_path-4.snap

@@ -0,0 +1,13 @@
+---
+source: crates/crates_io_linecount/src/paths.rs
+expression: "PathDetails::from_path(Path::new(\"benches/bench.rs\"))"
+---
+PathDetails {
+    is_benchmark: true,
+    is_example: false,
+    is_hidden: false,
+    is_test: false,
+    language_type: Some(
+        Rust,
+    ),
+}

crates/crates_io_linecount/src/snapshots/crates_io_linecount__paths__tests__should_count_path-5.snap

@@ -0,0 +1,13 @@
+---
+source: crates/crates_io_linecount/src/paths.rs
+expression: "PathDetails::from_path(Path::new(\"src/lib.rs\"))"
+---
+PathDetails {
+    is_benchmark: false,
+    is_example: false,
+    is_hidden: false,
+    is_test: false,
+    language_type: Some(
+        Rust,
+    ),
+}