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feat: improve error and warning messages in overlay
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snitin315 committed Dec 9, 2021
1 parent 9b7ae7b commit b0d7246
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Showing 4 changed files with 159 additions and 34 deletions.
9 changes: 3 additions & 6 deletions client-src/overlay.js
Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@

import ansiHTML from "ansi-html-community";
import { encode } from "html-entities";
import formatWebpackMessage from "./utils/format-webpack-message.js";

const colors = {
reset: ["transparent", "transparent"],
Expand Down Expand Up @@ -126,11 +127,8 @@ function hide() {

function formatProblem(type, item) {
let header = type === "warning" ? "WARNING" : "ERROR";
let body = "";

if (typeof item === "string") {
body += item;
} else {
if (typeof item === "object") {
const file = item.file || "";
// eslint-disable-next-line no-nested-ternary
const moduleName = item.moduleName
Expand All @@ -147,10 +145,9 @@ function formatProblem(type, item) {
}${loc ? ` ${loc}` : ""}`
: ""
}`;
body += item.message || "";
}

return { header, body };
return { header, body: formatWebpackMessage(item) };
}

// Compilation with errors (e.g. syntax error or missing modules).
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132 changes: 132 additions & 0 deletions client-src/utils/format-webpack-message.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,132 @@
/**
MIT License
Copyright (c) 2015-present, Facebook, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

import stripAnsi from "../modules/strip-ansi/index.js";
// This file is based on https://github.com/facebook/create-react-app/blob/7b1a32be6ec9f99a6c9a3c66813f3ac09c4736b9/packages/react-dev-utils/formatWebpackMessages.js
// It's been edited to remove chalk and CRA-specific logic

const friendlySyntaxErrorLabel = "Syntax error:";

// Cleans up webpack error messages.
function formatWebpackMessage(message, verbose) {
if (typeof message === "object" && message.message) {
const filteredModuleTrace =
message.moduleTrace &&
message.moduleTrace.filter(
(trace) =>
!/next-(middleware|client-pages|flight-(client|server))-loader\.js/.test(
trace.originName
)
);
message =
(message.moduleName ? `${stripAnsi(message.moduleName)}\n` : "") +
(message.file ? `${stripAnsi(message.file)}\n` : "") +
message.message +
(message.details && verbose ? `\n${message.details}` : "") +
(filteredModuleTrace && filteredModuleTrace.length && verbose
? `\n\nImport trace for requested module:${filteredModuleTrace
.map((trace) => `\n${trace.originName}`)
.join("")}`
: "") +
(message.stack && verbose ? `\n${message.stack}` : "");
}
let lines = message.split("\n");

// Strip Webpack-added headers off errors/warnings
// https://github.com/webpack/webpack/blob/master/lib/ModuleError.js
lines = lines.filter((line) => !/Module [A-z ]+\(from/.test(line));

// Transform parsing error into syntax error
lines = lines.map((line) => {
const parsingError = /Line (\d+):(?:(\d+):)?\s*Parsing error: (.+)$/.exec(
line
);
if (!parsingError) {
return line;
}
const [, errorLine, errorColumn, errorMessage] = parsingError;
return `${friendlySyntaxErrorLabel} ${errorMessage} (${errorLine}:${errorColumn})`;
});

message = lines.join("\n");
// Smoosh syntax errors (commonly found in CSS)
message = message.replace(
/SyntaxError\s+\((\d+):(\d+)\)\s*(.+?)\n/g,
`${friendlySyntaxErrorLabel} $3 ($1:$2)\n`
);
// Clean up export errors
message = message.replace(
/^.*export '(.+?)' was not found in '(.+?)'.*$/gm,
`Attempted import error: '$1' is not exported from '$2'.`
);
message = message.replace(
/^.*export 'default' \(imported as '(.+?)'\) was not found in '(.+?)'.*$/gm,
`Attempted import error: '$2' does not contain a default export (imported as '$1').`
);
message = message.replace(
/^.*export '(.+?)' \(imported as '(.+?)'\) was not found in '(.+?)'.*$/gm,
`Attempted import error: '$1' is not exported from '$3' (imported as '$2').`
);
lines = message.split("\n");

// Remove leading newline
if (lines.length > 2 && lines[1].trim() === "") {
lines.splice(1, 1);
}

// Cleans up verbose "module not found" messages for files and packages.
if (lines[1] && lines[1].indexOf("Module not found: ") === 0) {
lines = [
lines[0],
lines[1]
.replace("Error: ", "")
.replace("Module not found: Cannot find file:", "Cannot find file:"),
...lines.slice(2),
];
}

if (!verbose) {
message = lines.join("\n");
// Internal stacks are generally useless so we strip them... with the
// exception of stacks containing `webpack:` because they're normally
// from user code generated by Webpack. For more information see
// https://github.com/facebook/create-react-app/pull/1050
message = message.replace(
/^\s*at\s((?!webpack:).)*:\d+:\d+[\s)]*(\n|$)/gm,
""
// eslint-disable-next-line line-comment-position
); // at ... ...:x:y
// eslint-disable-next-line line-comment-position
message = message.replace(/^\s*at\s<anonymous>(\n|$)/gm, ""); // at <anonymous>
lines = message.split("\n");
}

// Remove duplicated newlines
lines = lines.filter(
(line, index, arr) =>
index === 0 || line.trim() !== "" || line.trim() !== arr[index - 1].trim()
);

// Reassemble the message
message = lines.join("\n");
return message.trim();
}

export default formatWebpackMessage;
24 changes: 12 additions & 12 deletions test/e2e/__snapshots__/overlay.test.js.snap.webpack4
Original file line number Diff line number Diff line change
Expand Up @@ -65,9 +65,9 @@ exports[`overlay should not show initially, then show on an error and allow to c
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
./foo.js 1:1 Module parse failed: Unterminated template (1:1) You may
need an appropriate loader to handle this file type, currently no
loaders are configured to process this file. See
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
<br /><br />
Expand Down Expand Up @@ -147,9 +147,9 @@ exports[`overlay should not show initially, then show on an error, then hide on
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
./foo.js 1:1 Module parse failed: Unterminated template (1:1) You may
need an appropriate loader to handle this file type, currently no
loaders are configured to process this file. See
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
<br /><br />
Expand Down Expand Up @@ -229,9 +229,9 @@ exports[`overlay should not show initially, then show on an error, then show oth
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
./foo.js 1:1 Module parse failed: Unterminated template (1:1) You may
need an appropriate loader to handle this file type, currently no
loaders are configured to process this file. See
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
<br /><br />
Expand Down Expand Up @@ -278,9 +278,9 @@ exports[`overlay should not show initially, then show on an error, then show oth
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
./foo.js 1:1 Module parse failed: Unterminated template (1:1) You may
need an appropriate loader to handle this file type, currently no
loaders are configured to process this file. See
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;a
</div>
<br /><br />
Expand Down
28 changes: 12 additions & 16 deletions test/e2e/__snapshots__/overlay.test.js.snap.webpack5
Original file line number Diff line number Diff line change
Expand Up @@ -63,11 +63,10 @@ exports[`overlay should not show initially, then show on an error and allow to c
X</button
><br /><br />
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR in ./foo.js 1:1</span
><br /><br />
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
Module parse failed: Unterminated template (1:1) You may need an
appropriate loader to handle this file type, currently no loaders are
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
Expand Down Expand Up @@ -146,11 +145,10 @@ exports[`overlay should not show initially, then show on an error, then hide on
X</button
><br /><br />
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR in ./foo.js 1:1</span
><br /><br />
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
Module parse failed: Unterminated template (1:1) You may need an
appropriate loader to handle this file type, currently no loaders are
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
Expand Down Expand Up @@ -229,11 +227,10 @@ exports[`overlay should not show initially, then show on an error, then show oth
X</button
><br /><br />
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR in ./foo.js 1:1</span
><br /><br />
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
Module parse failed: Unterminated template (1:1) You may need an
appropriate loader to handle this file type, currently no loaders are
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;
</div>
Expand Down Expand Up @@ -279,11 +276,10 @@ exports[`overlay should not show initially, then show on an error, then show oth
X</button
><br /><br />
<div>
<span style=\\"color: rgb(227, 96, 73)\\">ERROR in ./foo.js 1:1</span
><br /><br />
<span style=\\"color: rgb(227, 96, 73)\\">ERROR</span><br /><br />
<div>
Module parse failed: Unterminated template (1:1) You may need an
appropriate loader to handle this file type, currently no loaders are
./foo.js Module parse failed: Unterminated template (1:1) You may need
an appropriate loader to handle this file type, currently no loaders are
configured to process this file. See
https://webpack.js.org/concepts#loaders &gt; \`;a
</div>
Expand Down

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