--config-name fails for a function returning an array of configurations #1990
Description
When webpack.config.js exports a function returning an array of named configurations, webpack --config-name=NAME can’t find them. It incorrectly complains [webpack-cli] Configuration with name "NAME" was not found.
$ webpack --version
webpack-cli 4.1.0
webpack 5.3.0
$ cat >src.js <<EOF
console.log("Hello, world!")
EOF
$ cat >webpack.config.js <<EOF
module.exports = () => [
{ name: "a", output: { filename: "a.js" } },
{ name: "b", output: { filename: "b.js" } },
];
$ webpack
[webpack-cli] Compilation finished
a:
asset a.js 29 bytes [compared for emit] [minimized] (name: main)
./src.js 29 bytes [built] [code generated]
a (webpack 5.3.0) compiled successfully in 147 ms
b:
asset b.js 29 bytes [emitted] [minimized] (name: main)
./src.js 29 bytes [built] [code generated]
b (webpack 5.3.0) compiled successfully in 139 ms
$ webpack --config-name=a
[webpack-cli] Configuration with name "a" was not found.It works for a function returning a single configuration:
$ cat >webpack.config.js <<EOF
module.exports = () => ({ name: "a", output: { filename: "a.js" } });
EOF
$ webpack --config-name=a
[webpack-cli] Compilation finished
asset a.js 29 bytes [compared for emit] [minimized] (name: main)
./src.js 29 bytes [built] [code generated]
a (webpack 5.3.0) compiled successfully in 157 msor for an array that’s not wrapped in a function:
$ cat >webpack.config.js <<EOF
module.exports = [
{ name: "a", output: { filename: "a.js" } },
{ name: "b", output: { filename: "b.js" } },
];
EOF
$ webpack --config-name=a
[webpack-cli] Compilation finished
asset a.js 29 bytes [compared for emit] [minimized] (name: main)
./src.js 29 bytes [built] [code generated]
a (webpack 5.3.0) compiled successfully in 142 ms