mort-css/src/grep-programs/gitgrep.ts

Dead CSS detection

const child_process = require("child_process");
import { IGrep } from "../interfaces/IGrep";
import { Printer } from "../printer";
import { Selector } from "../selector";
import { Selectors } from "../selectors";

class GitGrep implements IGrep {

    public run(cssFilePath: string, searchOnly: string = "", printer: Printer | null = null): Selector[]  {
        const selectors = new Selectors();
        const cleanSelectors = selectors.fromFile(cssFilePath);
        return selectors.findUsages(this, searchOnly, cleanSelectors, printer);
    }

    public call(selector: string, path: string) {

        const call = child_process.spawnSync(
            "git",
            [
                "grep", // subcommand
                "-i",
                selector,
                ":!*.css",
                ":!*.scss",
                path,
            ],
            {
                stdio: "pipe",
                encoding: "utf-8",
            },
        );

        // Seems to be some deviation between node 8 and 9>
        // where args is empty on 9 and greater.
        // We'll just force it in instead...
        call.args = ["git", "grep", "-i", selector, ":!*.css", ":!*.scss", path];
        return call;
    }
}

export { GitGrep };