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import fs from "node:fs/promises";
import path from "node:path";
import childProcess from "node:child_process";
export const IMG_RX = /(\.png|\.jpg|\.svg|\.gif)$/gim;
export const SLUG_RX = /(?<=\nslug: ).*?$/gm;
export async function* walkSync(dir) {
const files = await fs.readdir(dir, { withFileTypes: true });
for (const file of files) {
if (file.isDirectory()) {
yield* walkSync(path.join(dir, file.name));
} else {
yield path.join(dir, file.name);
}
}
}
export function execGit(args, opts = {}, root = null) {
const gitRoot = root || getRootDir();
const { status, error, stdout, stderr } = childProcess.spawnSync(
"git",
args,
{
cwd: gitRoot,
// Default is 1MB
maxBuffer: 1024 * 1024 * 100, // 100MB
},
);
if (error || status !== 0) {
if (stderr) {
console.log(args);
console.log(`Error running git ${args}`);
console.error(stderr);
}
if (error) {
throw error;
}
throw new Error(
`git command failed: ${stderr.toString() || stdout.toString()}`,
);
}
return stdout.toString().trim();
}
export function getRootDir() {
return execGit(["rev-parse", "--show-toplevel"], {}, process.cwd());
}
export function isImagePath(path) {
return IMG_RX.test(path);
}
/*
* Returns locations (line and column numbers) of 'searchValue' in the given 'content'.
*/
export function getLocations(content, searchValue) {
const lineLengths = content.split("\n").map((line) => line.length);
const searchRx =
searchValue instanceof RegExp
? searchValue
: new RegExp(searchValue, "mig");
const matches = [...content.matchAll(searchRx)].map((match) => match.index);
const positions = [];
let currentPosition = 0;
lineLengths.forEach((lineLength, index) => {
lineLength += 1; // add '\n'
for (const match of matches) {
if (currentPosition < match && currentPosition + lineLength > match) {
positions.push({
line: index + 1,
column: match - currentPosition + 1,
});
}
}
currentPosition += lineLength;
});
return positions;
}
/*
* Convert Markdown header into URL slug.
*/
export function stringToFragment(text) {
if (!text) return text;
return text
.trim()
.replace(/["#$%&+,/:;=?@[\]^`{|}~')(\\]/g, "")
.replace(/\s+/g, "_");
}
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