dotnet/msbuild

"Only one project" error should indicate all projects from the command line

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#2,121 opened on May 22, 2017

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Description

If some combination of the MSBuild command line and response file list multiple projects, MSBuild emits an error:

MSBUILD : error MSB1008: Only one project can be specified.
Switch: .\msbuild.binlog

But that error only lists one project. It would be nice if it listed all of the projects, to make it easier to figure out what intent was.

Issues like #2112 would be more easily debugged if this was the case.

Contributor guide

Research direction
Locate the error MSB1008 in the MSBuild codebase, trace the logic that collects project arguments, and modify the error message to include all projects instead of just one.
Tech stack
csharp
Domain
build systemcli
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70