Fixes #357 Use a read stream for artifacts.

This seems to be safe since octokit mentions ReadableStreams in their fetcher wrapper & tests: https://github.com/octokit/request.js/blob/main/src/fetch-wrapper.ts#L44
(and also it seems to work when I test it).

__tests__/Artifact.test.ts

@@ -1,12 +1,14 @@
-import { Artifact } from "../src/Artifact";
+import {Artifact} from "../src/Artifact";
 
-const fileContents = Buffer.from('artful facts', 'utf-8')
 const contentLength = 42
+const fakeReadStream = {}
 
 jest.mock('fs', () => {
     return {
-        readFileSync: () => fileContents,
-        statSync: () => { return { size: contentLength } }
+        createReadStream: () => fakeReadStream,
+        statSync: () => {
+            return {size: contentLength}
+        }
     };
 })
 
@@ -33,6 +35,6 @@ describe("Artifact", () => {
 
     it('reads artifact', () => {
         const artifact = new Artifact('some/artifact')
-        expect(artifact.readFile()).toBe(fileContents)
+        expect(artifact.readFile()).toBe(fakeReadStream)
     })
 })

__tests__/ArtifactUploader.test.ts

@@ -7,7 +7,7 @@ const artifacts = [
     new Artifact('a/art1'),
     new Artifact('b/art2')
 ]
-const fileContents = Buffer.from('artful facts', 'utf-8')
+const fakeReadStream = {}
 const contentLength = 42
 const releaseId = 100
 const url = 'http://api.example.com'
@@ -19,7 +19,7 @@ const uploadMock = jest.fn()
 jest.mock('fs', () => {
     return {
         promises: {},
-        readFileSync: () => fileContents,
+        createReadStream: () => fakeReadStream,
         statSync: () => {
             return {size: contentLength}
         }
@@ -42,9 +42,9 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(2)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(0)
     })
@@ -58,15 +58,15 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(5)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(0)
     })
@@ -81,9 +81,9 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(2)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(2)
         expect(deleteMock).toBeCalledWith(1)
@@ -100,9 +100,9 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(2)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(0)
     })
@@ -116,13 +116,13 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(4)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(0)
     })
@@ -164,9 +164,9 @@ describe('ArtifactUploader', () => {
 
         expect(uploadMock).toBeCalledTimes(2)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art1', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art1', releaseId)
         expect(uploadMock)
-            .toBeCalledWith(url, contentLength, 'raw', fileContents, 'art2', releaseId)
+            .toBeCalledWith(url, contentLength, 'raw', fakeReadStream, 'art2', releaseId)
 
         expect(deleteMock).toBeCalledTimes(0)
     })

dist/index.js

@@ -205,7 +205,7 @@ class Artifact {
         return (0, fs_1.statSync)(this.path).size;
     }
     readFile() {
-        return (0, fs_1.readFileSync)(this.path);
+        return (0, fs_1.createReadStream)(this.path);
     }
 }
 exports.Artifact = Artifact;

src/Artifact.ts

@@ -1,5 +1,5 @@
 import { basename } from "path";
-import { readFileSync, statSync } from "fs";
+import {createReadStream, readFileSync, ReadStream, statSync} from "fs";
 
 export class Artifact {
     readonly contentType: string
@@ -16,7 +16,7 @@ export class Artifact {
         return statSync(this.path).size
     }
 
-    readFile(): Buffer {
-        return readFileSync(this.path)
+    readFile(): ReadStream {
+        return createReadStream(this.path)
     }
 }