sass/dart-sass

Support compiling the same source to multiple destinations

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#981 opened on Mar 5, 2020

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CLIenhancementhelp wanted

Description

I'm using Dart Sass 1.22.12.

I'm trying to compile the same sass to multiple directories while watching them.

I have the following in my script: sass --watch sass:sv/css sass:hv/css

But it throws this error: Duplicate source "sass".

I've also tried replacing the path sass with sass/site.scss, but then it just says Duplicate source "sass/site.scss". instead.

Both paths appear to work just fine when I compile them individually, so I don't think there's something wrong with the paths it needs to be compiled to.

Is there something wrong with my script by any chance? Or is it simply not possible to compile to multiple directories with the same input?

Contributor guide

Tech stack
None
Domain
cli
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with Dart Sass's command line interfaceUnderstanding of file watching and compilation workflows
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the command line argument parsing in the Dart Sass source code, specifically how the watch flag currently handles the source to destination mapping. Look for the error 'Duplicate source' to find where the duplicate check is enforced. The change would require allowing multiple destination paths for the same source. Check the repository's CONTRIBUTING.md for guidelines on how to implement new features.