Microsoft/TypeScript

Suggestion: tsc should display a one line summary

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#14,211 opened on Feb 21, 2017

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 (10 comments) (12 reactions) (0 assignees)TypeScript (48,455 stars) (6,726 forks)batch import
Help WantedSuggestion

Description

Suggestion: tsc currently list the errors. Sometimes you want to see if the number of errors increases or decreases.

Proposition:

$ tsc
FooBar.tsx(66,59): error TS2339: Property 'query' does not exist on type 'Location'.
Hello.tsx(42,60): error TS2339: Property 'query' does not exist on type 'Location'.
dispatcher.ts(1,13): error TS6133: '_' is declared but never used.
World.test.ts(3,35): error TS7006: Parameter 'reason' implicitly has an 'any' type.
World.test.ts(3,43): error TS7006: Parameter 'promise' implicitly has an 'any' type.
World.test.ts(18,13): error TS6133: 'hello' is declared but never used.
mock.ts(194,23): error TS6133: 'ruleId' is declared but never used.
mock.ts(221,8): error TS2339: Property 'fetch' does not exist on type 'Window'.

Compilation done in 2.6s - 8 errors

$ tsc
[...]
Compilation aborted [...]

Could be the opportunity to display other informations (compilation time for example) given that it fits in a single line (72 columns).

(I'm not talking about --diagnostics)

Contributor guide

Tech stack
typescript
Domain
clideveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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
TypeScript compiler internalsCLI output handling
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate the TypeScript compiler's output handling in 'src/compiler/program.ts' and 'src/compiler/sys.ts' to see where errors are emitted. Currently, errors are printed line by line without a summary. The feature requires modifying the output to collect error count and compilation duration, then printing a single summary line after errors. Look at the existing ' diagnostics' flag for inspiration.