Unable to specify a new line after a header using a template file

[jonnycornwell]

I am trying to use a template header from file but due to the fact that it trims when loading from file it is removing the trailing new lines which I require due to microsoft/TypeScript#12307 (comment). I am also unable to specify a newline going the route with a single argument.

It would be good to either not trim the comment when loading from a file (though this would be a major breaking change as some users may depend on it) or maybe support adding newlines when using the template file?

[Stuk]

If it understand the linked comment correctly, the newline must be in-between the comment and the first line, rather than within the comment itself. Maybe I'm misunderstanding though?

[shorsher]

Yes.

If your file is

console.log(1)

and your license is (see blank line beneath final comment)

// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

your file would become

// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
console.log(1)

The trailing line is not preserved.

[liarco]

Same issue here, the template file is trimmed by the comment parser:

eslint-plugin-header/lib/comment-parser.js

Line 7 in e12c5bc

text = text.trim();

This makes it impossible to force new lines at the end of the comment while using a template file.