From 04ca884de7682fb72a3f7e027e7c0eb3b660851b Mon Sep 17 00:00:00 2001
From: Muescha <>
Date: Fri, 20 Dec 2019 16:42:20 +0100
Subject: [PATCH] remove unused function getHashFn

---
 .../__snapshots__/get-hash-fn.js.snap         |  5 -----
 .../gatsby/src/utils/__tests__/get-hash-fn.js | 16 --------------
 packages/gatsby/src/utils/get-hash-fn.js      | 22 -------------------
 3 files changed, 43 deletions(-)
 delete mode 100644 packages/gatsby/src/utils/__tests__/__snapshots__/get-hash-fn.js.snap
 delete mode 100644 packages/gatsby/src/utils/__tests__/get-hash-fn.js
 delete mode 100644 packages/gatsby/src/utils/get-hash-fn.js

diff --git a/packages/gatsby/src/utils/__tests__/__snapshots__/get-hash-fn.js.snap b/packages/gatsby/src/utils/__tests__/__snapshots__/get-hash-fn.js.snap
deleted file mode 100644
index c8cd15bb7bf7b..0000000000000
--- a/packages/gatsby/src/utils/__tests__/__snapshots__/get-hash-fn.js.snap
+++ /dev/null
@@ -1,5 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`Test hashing function default parameters 1`] = `174577032270956`;
-
-exports[`Test hashing function guards against collisions 1`] = `[Error: Hash collision at f(my input) = 174577032270956]`;
diff --git a/packages/gatsby/src/utils/__tests__/get-hash-fn.js b/packages/gatsby/src/utils/__tests__/get-hash-fn.js
deleted file mode 100644
index a816ed65f73ee..0000000000000
--- a/packages/gatsby/src/utils/__tests__/get-hash-fn.js
+++ /dev/null
@@ -1,16 +0,0 @@
-const getHashFn = require(`../get-hash-fn`)
-
-describe(`Test hashing function`, () => {
-  it(`default parameters`, () => {
-    const hash = getHashFn({})(`my input`)
-    expect(hash).toMatchSnapshot()
-  })
-  it(`guards against collisions`, () => {
-    const hash = getHashFn({})(`my input`)
-    try {
-      getHashFn({ cache: new Set([hash]) })(`my input`)
-    } catch (err) {
-      expect(err).toMatchSnapshot()
-    }
-  })
-})
diff --git a/packages/gatsby/src/utils/get-hash-fn.js b/packages/gatsby/src/utils/get-hash-fn.js
deleted file mode 100644
index efdb6762764be..0000000000000
--- a/packages/gatsby/src/utils/get-hash-fn.js
+++ /dev/null
@@ -1,22 +0,0 @@
-const createHash = require(`crypto`).createHash
-
-const getHashFn = ({
-  hashFunction = `md5`,
-  hashDigest = `hex`,
-  hashDigestBits = 48,
-  cache = new Set(),
-}) => input => {
-  const hash = createHash(hashFunction)
-  hash.update(input)
-  const digest = hash.digest(hashDigest)
-  const partialDigest = digest.substr(0, hashDigestBits / 4)
-  const output = parseInt(partialDigest, 16)
-  // guard against collisions
-  if (cache.has(output)) {
-    throw Error(`Hash collision at f(${input}) = ${output}`)
-  }
-  cache.add(output)
-  return output
-}
-
-module.exports = getHashFn