[PR #1385] Add syntax highlighting of Pkl code #1060

New Issue

2025-12-30T01:28:33+01:00

adam commented

2025-12-30 01:28:33 +01:00

📋 Pull Request Information

Original PR: https://github.com/apple/pkl/pull/1385
Author: @bioball
Created: 12/24/2025
Status: 🔄 Open

Base: main ← Head: syntax-highlighting

📝 Commits (1)

56b8607 Add syntax highlighting of Pkl code

📊 Changes

8 files changed (+270 additions, -22 deletions)

View changed files

📝 pkl-cli/src/main/kotlin/org/pkl/cli/CliRepl.kt (+1 -1)
📝 pkl-cli/src/main/kotlin/org/pkl/cli/repl/Repl.kt (+39 -11)
📝 pkl-core/src/main/java/org/pkl/core/repl/ReplServer.java (+7 -2)
📝 pkl-core/src/main/java/org/pkl/core/runtime/StackTraceRenderer.java (+7 -4)
📝 pkl-core/src/main/java/org/pkl/core/util/AnsiStringBuilder.java (+25 -2)
📝 pkl-core/src/main/java/org/pkl/core/util/AnsiTheme.java (+12 -2)
➕ pkl-core/src/main/java/org/pkl/core/util/SyntaxHighlighter.java (+171 -0)
📝 pkl-parser/src/main/java/org/pkl/parser/Lexer.java (+8 -0)

📄 Description

This adds syntax highlighting of Pkl code!

It adds highlighting for:

Stack frames within error messages
CLI REPL (highlights as you type, highlights error output)
Power assertions (coming in https://github.com/apple/pkl/pull/1384)

This uses the lexer for highlighting. It will highlight strings, numbers, keywords, but doesn't understand how to highlight nodes like types, function params, etc.
The reason for this is because a single line of code by itself may not be grammatically valid.

Sample screenshots:

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/apple/pkl/pull/1385 **Author:** [@bioball](https://github.com/bioball) **Created:** 12/24/2025 **Status:** 🔄 Open **Base:** `main` ← **Head:** `syntax-highlighting` --- ### 📝 Commits (1) - [`56b8607`](https://github.com/apple/pkl/commit/56b8607ab3f076378d9189f3fa7b86dfc2b60e16) Add syntax highlighting of Pkl code ### 📊 Changes **8 files changed** (+270 additions, -22 deletions) <details> <summary>View changed files</summary> 📝 `pkl-cli/src/main/kotlin/org/pkl/cli/CliRepl.kt` (+1 -1) 📝 `pkl-cli/src/main/kotlin/org/pkl/cli/repl/Repl.kt` (+39 -11) 📝 `pkl-core/src/main/java/org/pkl/core/repl/ReplServer.java` (+7 -2) 📝 `pkl-core/src/main/java/org/pkl/core/runtime/StackTraceRenderer.java` (+7 -4) 📝 `pkl-core/src/main/java/org/pkl/core/util/AnsiStringBuilder.java` (+25 -2) 📝 `pkl-core/src/main/java/org/pkl/core/util/AnsiTheme.java` (+12 -2) ➕ `pkl-core/src/main/java/org/pkl/core/util/SyntaxHighlighter.java` (+171 -0) 📝 `pkl-parser/src/main/java/org/pkl/parser/Lexer.java` (+8 -0) </details> ### 📄 Description This adds syntax highlighting of Pkl code! It adds highlighting for: * Stack frames within error messages * CLI REPL (highlights as you type, highlights error output) * Power assertions (coming in https://github.com/apple/pkl/pull/1384) This uses the lexer for highlighting. It will highlight strings, numbers, keywords, but doesn't understand how to highlight nodes like types, function params, etc. The reason for this is because a single line of code by itself may not be grammatically valid. Sample screenshots: <img width="456" height="436" alt="Screenshot 2025-12-23 at 10 32 37 PM" src="https://github.com/user-attachments/assets/b96fc23a-2f59-4064-a6da-273d94aae8d3" /> <img width="1136" height="350" alt="Screenshot 2025-12-23 at 10 39 10 PM" src="https://github.com/user-attachments/assets/71c79396-7dc3-445e-81b4-f5011c7ef6be" /> --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

adam added the pull-request label 2025-12-30 01:28:33 +01:00

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Reference: starred/pkl#1060