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// SPDX-License-Identifier: Apache-2.0
//! Semantic change descriptions.
use std::path::PathBuf;
use serde::{Deserialize, Serialize};
/// What kind of modification was made to a file.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum ModificationKind {
/// Real logic/behaviour change.
Logic,
/// Only whitespace or indentation changed.
WhitespaceOnly,
/// Only import/use statements changed.
ImportsOnly,
/// Only comments changed.
CommentsOnly,
/// Formatting pass (tokens identical, layout differs).
FormattingOnly,
/// Mix of logic and non-logic changes.
Mixed,
}
/// How important is this change for review.
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
pub enum ChangeImportance {
/// Reviewer can safely skip.
Noise,
/// Low priority — imports, comments, renames.
Low,
/// Medium priority — mixed changes, signature tweaks.
Medium,
/// High priority — logic changes, new/deleted functions.
High,
}
/// A semantic change description.
#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
pub enum SemanticChange {
/// A new file was added.
FileAdded { path: PathBuf },
/// A file was deleted.
FileDeleted { path: PathBuf },
/// A file was modified.
FileModified {
path: PathBuf,
#[serde(default)]
classification: Option<ModificationKind>,
#[serde(default)]
importance: Option<ChangeImportance>,
/// Confidence in the classification (0.0–1.0). AST-backed = high, token-fallback = lower.
#[serde(default)]
confidence: Option<f64>,
},
/// A file was renamed.
FileRenamed { from: PathBuf, to: PathBuf },
/// A function was added without enough evidence to call it an extraction.
FunctionAdded {
file: PathBuf,
name: String,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function was extracted from an existing function.
FunctionExtracted {
file: PathBuf,
name: String,
#[serde(default)]
source_file: Option<PathBuf>,
#[serde(default)]
source_name: Option<String>,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function was deleted.
FunctionDeleted {
file: PathBuf,
name: String,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function was renamed.
FunctionRenamed {
file: PathBuf,
old_name: String,
new_name: String,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function body changed without a signature/name change.
FunctionModified {
file: PathBuf,
name: String,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function moved within the same file without changing its body.
FunctionMoved {
file: PathBuf,
name: String,
old_start_line: usize,
new_start_line: usize,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A function signature changed.
SignatureChanged {
file: PathBuf,
name: String,
old_signature: String,
new_signature: String,
#[serde(default)]
importance: Option<ChangeImportance>,
},
/// A dependency was added.
DependencyAdded { name: String, version: String },
/// A dependency was removed.
DependencyRemoved { name: String },
/// Custom semantic change.
Custom {
change_type: String,
data: serde_json::Value,
},
}
impl SemanticChange {
/// Get a short description.
pub fn description(&self) -> String {
match self {
SemanticChange::FileAdded { path } => format!("add {}", path.display()),
SemanticChange::FileDeleted { path } => format!("delete {}", path.display()),
SemanticChange::FileModified {
path,
classification,
..
} => {
if let Some(kind) = classification {
format!("modify {} ({:?})", path.display(), kind)
} else {
format!("modify {}", path.display())
}
}
SemanticChange::FileRenamed { from, to } => {
format!("rename {} -> {}", from.display(), to.display())
}
SemanticChange::FunctionAdded { file, name, .. } => {
format!("add function {} in {}", name, file.display())
}
SemanticChange::FunctionExtracted {
file,
name,
source_file,
source_name,
..
} => {
if let Some(source_name) = source_name {
let source_file = source_file.as_ref().unwrap_or(file);
format!(
"extract function {} from {} in {}",
name,
source_name,
source_file.display()
)
} else {
format!("extract function {} in {}", name, file.display())
}
}
SemanticChange::FunctionDeleted { file, name, .. } => {
format!("delete function {} in {}", name, file.display())
}
SemanticChange::FunctionRenamed {
file,
old_name,
new_name,
..
} => {
format!("rename {} -> {} in {}", old_name, new_name, file.display())
}
SemanticChange::FunctionModified { file, name, .. } => {
format!("modify function {} in {}", name, file.display())
}
SemanticChange::FunctionMoved {
file,
name,
old_start_line,
new_start_line,
..
} => {
format!(
"move function {} in {} ({} -> {})",
name,
file.display(),
old_start_line + 1,
new_start_line + 1
)
}
SemanticChange::SignatureChanged { file, name, .. } => {
format!("change signature of {} in {}", name, file.display())
}
SemanticChange::DependencyAdded { name, version } => {
format!("add dependency {}@{}", name, version)
}
SemanticChange::DependencyRemoved { name } => {
format!("remove dependency {}", name)
}
SemanticChange::Custom { change_type, .. } => {
format!("custom: {}", change_type)
}
}
}
}