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chore(populateCache): skip if blob already cached

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This commit is contained in:
Anton Strogonoff 2021-11-25 14:05:51 +01:00
parent 023e7af0ba
commit 31fb997b69
2 changed files with 22 additions and 6 deletions
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7
src/populateCache.ts
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@ -4,7 +4,7 @@ import fs from 'fs/promises';
import git from 'isomorphic-git'; import git from 'isomorphic-git';
import http from 'isomorphic-git/http/node'; import http from 'isomorphic-git/http/node';
import { isWriteable, pointsToLFS } from './util'; import { isVacantAndWriteable, isWriteable, pointsToLFS } from './util';
import downloadBlobFromPointer from './download'; import downloadBlobFromPointer from './download';
import { readPointer } from "./pointers"; import { readPointer } from "./pointers";
@ -55,8 +55,9 @@ export default async function populateCache(workDir: string, ref: string = 'HEAD
if (pointsToLFS(buff)) { if (pointsToLFS(buff)) {
const pointer = readPointer({ dir: workDir, content: buff }); const pointer = readPointer({ dir: workDir, content: buff });
// Don’t even start the download if LFS cache path is not accessible. // Don’t even start the download if LFS cache path is not accessible,
if (await isWriteable(pointer.objectPath) === false) // or if it already exists
if (await isVacantAndWriteable(pointer.objectPath) === false)
return; return;
const content = await downloadBlobFromPointer( const content = await downloadBlobFromPointer(

19
src/util.ts
View file

@ -20,12 +20,27 @@ export async function isWriteable(filepath: string): Promise<boolean> {
await fs.access(filepath, fsConstants.W_OK); await fs.access(filepath, fsConstants.W_OK);
return true; return true;
} catch (e) { } catch (e) {
if ((e as { code: string }).code !== 'ENOENT') { if ((e as { code: string }).code === 'ENOENT') {
return true;
}
return false; return false;
} else { }
}
/**
* Returns true if given path is available for writing
* and not occupied.
*/
export async function isVacantAndWriteable(filepath: string): Promise<boolean> {
try {
await fs.access(filepath, fsConstants.W_OK);
} catch (e) {
if ((e as { code: string }).code === 'ENOENT') {
return true; return true;
} }
} }
return false;
} }