Struct DepGraph 

pub struct DepGraph { /* private fields */ }

Dependency graph wrapper around petgraph.

Implementations

impl DepGraph

pub fn from_project_graph(pg: &ProjectGraph) -> Self

Build from a ProjectGraph. Edges go from dependent → dependency.

pub fn affected_by(&self, changed: &HashSet<PackageId>) -> HashSet<PackageId>

Given a set of directly changed packages, return all transitively affected packages (changed + everything that depends on them).

Uses BFS on the reversed graph: if A→B means “A depends on B”, then in the reversed graph B→A, and BFS from a changed node B finds all packages that transitively depend on B.

pub fn explain_affected( &self, changed: &HashSet<PackageId>, affected: &HashSet<PackageId>, ) -> Vec<(PackageId, Vec<PackageId>)>

For each affected package, return the shortest dependency chain back to a directly changed package. Uses BFS on the reversed graph, tracking parents.

pub fn has_cycles(&self) -> bool

Check if the dependency graph contains any cycles.

pub fn find_cycles(&self) -> Vec<Vec<PackageId>>

Find and return all cycles in the graph (SCCs with size > 1).

pub fn to_dot_with_affected( &self, changed: &HashSet<PackageId>, affected: &HashSet<PackageId>, ) -> String

Enhanced DOT output where affected nodes are colored red and changed nodes are orange.

pub fn all_packages(&self) -> Vec<&PackageId>

Return all package IDs in the graph.

pub fn to_dot(&self) -> String

Generate DOT format output for graphviz visualization.

pub fn edges(&self) -> Vec<(&PackageId, &PackageId)>

Return all edges as (from, to) pairs for display.