Throw if the given source file does not exist (#68)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

Author: whitecrownclown

index.d.ts

@@ -81,7 +81,7 @@ declare namespace cpy {
 /**
 Copy files.
 
-@param source - Files to copy.
+@param source - Files to copy. If any of the files do not exist, an error will be thrown (does not apply to globs).
 @param destination - Destination directory.
 @param options - In addition to the options defined here, options are passed to [globby](https://github.com/sindresorhus/globby#options).
 

index.js

@@ -5,6 +5,7 @@ const os = require('os');
 const pAll = require('p-all');
 const arrify = require('arrify');
 const globby = require('globby');
+const isGlob = require('is-glob');
 const cpFile = require('cp-file');
 const junk = require('junk');
 const CpyError = require('./cpy-error');
@@ -65,13 +66,10 @@ module.exports = (source, destination, {
 			throw new CpyError(`Cannot glob \`${source}\`: ${error.message}`, error);
 		}
 
-		if (files.length === 0) {
-			progressEmitter.emit('progress', {
-				totalFiles: 0,
-				percent: 1,
-				completedFiles: 0,
-				completedSize: 0
-			});
+		const sourcePaths = source.filter(value => !isGlob(value));
+
+		if (files.length === 0 || (sourcePaths.length > 0 && !sourcePaths.every(value => files.includes(value)))) {
+			throw new CpyError(`Cannot copy \`${source}\`: the file doesn't exist`);
 		}
 
 		const fileProgressHandler = event => {

package.json

@@ -45,9 +45,10 @@
 		"arrify": "^2.0.1",
 		"cp-file": "^7.0.0",
 		"globby": "^9.2.0",
+		"is-glob": "^4.0.1",
+		"junk": "^3.1.0",
 		"nested-error-stacks": "^2.1.0",
-		"p-all": "^2.1.0",
-		"junk": "^3.1.0"
+		"p-all": "^2.1.0"
 	},
 	"devDependencies": {
 		"ava": "^2.1.0",

readme.md

@@ -43,6 +43,8 @@ Type: `string | string[]`
 
 Files to copy.
 
+If any of the files do not exist, an error will be thrown (does not apply to globs).
+
 #### destination
 
 Type: `string`

test.js

@@ -140,21 +140,34 @@ test('glob errors are CpyErrors', async t => {
 	t.true(error instanceof CpyError);
 });
 
-test('reports copy progress of no files', async t => {
+test('throws on non-existing file', async t => {
 	fs.mkdirSync(t.context.tmp);
-	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
 
-	let report;
-	await cpy('*', t.context.tmp, {cwd: path.join(t.context.tmp, 'cwd')})
-		.on('progress', event => {
-			report = event;
-		});
+	await t.throwsAsync(cpy(['no-file'], t.context.tmp), {
+		instanceOf: CpyError
+	});
+});
 
-	t.not(report, undefined);
-	t.is(report.totalFiles, 0);
-	t.is(report.completedFiles, 0);
-	t.is(report.completedSize, 0);
-	t.is(report.percent, 1);
+test('throws on multiple non-existing files', async t => {
+	fs.mkdirSync(t.context.tmp);
+
+	await t.throwsAsync(cpy(['no-file1', 'no-file2'], t.context.tmp), {
+		instanceOf: CpyError
+	});
+});
+
+test('does not throw when not matching any file on glob pattern', async t => {
+	fs.mkdirSync(t.context.tmp);
+
+	await t.notThrowsAsync(cpy(['*.js'], t.context.tmp));
+});
+
+test('throws on mixed path and glob if path does not exist', async t => {
+	fs.mkdirSync(t.context.tmp);
+
+	await t.throwsAsync(cpy(['*', 'no-file'], t.context.tmp), {
+		instanceOf: CpyError
+	});
 });
 
 test('junk files are ignored', async t => {
@@ -205,7 +218,7 @@ test('nested junk files are ignored', async t => {
 
 	let report;
 
-	await cpy(['cwd/Thumbs.db', 'cwd/test'], t.context.tmp, {cwd: t.context.tmp, ignoreJunk: true})
+	await cpy(['cwd/*'], t.context.tmp, {cwd: t.context.tmp, ignoreJunk: true})
 		.on('progress', event => {
 			report = event;
 		});