[WIP] Change Impact Analyzer

Git-diff-oriented change impact analysis for code changes.

cia reports:

• changed symbols
• impacted symbols

---

Features

• Diff-based impact analysis
• Compare local changes, branches, or explicit Git bases
• JSON and TOON output

Installation

From source:

git clone https://github.com/dsafdsaf132/change-impact-analyzer.git
cd change-impact-analyzer
cargo install --path .

Rust HIR analysis requires rustc-dev:

rustup component add rustc-dev

Usage

Scan local changes:

cia scan

Scan against an explicit base:

cia scan --diff-base main

Scan a branch against origin/main:

cia scan \
  --diff-mode merge-base \
  --upstream origin/main

Explain a reported symbol:

cia explain <symbol-id>

Emit TOON output:

cia scan --output toon

Backends

Rust is the first precise backend.

C++, Python, and TypeScript are planned.

Backend selection:

cia scan --rust-backend auto

cia scan --rust-backend rustc

cia scan --rust-backend rust-analyzer

cia scan --rust-backend off

Configuration

Project settings live in:

.cia/config.json

Example:

{
  "version": 1,
  "rust": {
    "matrix": {
      "targets": ["host", "wasm32-unknown-unknown"],
      "feature_sets": ["serde,cli"],
      "no_default_features": false,
      "all_features": false,
      "all_targets": false
    },
    "matrix_profiles": {
      "ci": {
        "all_targets": true
      }
    }
  }
}

Config fields:

Field	Description	Options	Default
rust.matrix	Default Rust analysis matrix.	{ targets, feature_sets, no_default_features, all_features, all_targets }	Empty arrays and false booleans.
rust.matrix.targets	Rust targets to check.	["host" | "default" | <target-triple>, ...]	[], default target.
rust.matrix.feature_sets	Cargo feature sets to check.	[<cargo-feature-string>, ...]	[], default feature set.
rust.matrix.no_default_features	Disable Cargo default features.	true or false.	false
rust.matrix.all_features	Check with all Cargo features enabled.	true or false.	false
rust.matrix.all_targets	Check all Cargo targets.	true or false.	false
rust.matrix_profiles	Named Rust matrix overrides.	{ "<profile-name>": { ...matrix } }	{}

License

MIT License