Check if 'bufnr' is a fern buffer before replacing the buffer #516
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WalkthroughThe changes in the pull request focus on enhancing error handling and control flow in the Changes
Assessment against linked issues
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (1)
autoload/fern/helper/async.vim (1)
353-362: Consider using a more strict pattern for fern buffer validationWhile the current check works, consider using a more strict pattern to ensure the buffer name fully matches the fern protocol format.
- if bufname(a:bufnr) !~# 'fern://' + if bufname(a:bufnr) !~# '^fern://.\{-}/$'This pattern ensures:
- The name starts with 'fern://'
- Has some content after the protocol
- Ends with a forward slash
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📒 Files selected for processing (1)
autoload/fern/helper/async.vim(2 hunks)
🔇 Additional comments (3)
autoload/fern/helper/async.vim (3)
22-26: LGTM! Well-structured error handling for non-fern buffers
The changes properly integrate buffer validation into the promise chain, with appropriate error handling that distinguishes between non-fern buffer rejections and other errors.
364-366: LGTM! Clear and focused rejection message handling
The function provides a clean way to identify specific non-fern buffer rejections, which helps in proper error handling.
22-26: Verify behavior during rapid buffer switching
The changes look good, but let's verify the behavior during rapid buffer switching scenarios to ensure robustness.
Also applies to: 353-366
✅ Verification successful
Let me analyze the code further to verify the buffer switching behavior.
Based on the code analysis, I can now provide a final response about the buffer switching behavior:
Buffer switching behavior is properly handled
The implementation includes robust buffer validation and event handling mechanisms that ensure safe buffer switching:
- Non-fern buffers are protected through explicit validation before replacement
- Buffer events (BufEnter/WinEnter/BufLeave/WinLeave) are properly handled with appropriate state management
- The drawer functionality includes smart quit, auto resize, and focus restoration during buffer switches
- Cursor and UI state are preserved during rapid buffer switching through dedicated event handlers
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for buffer switching related code to understand potential edge cases
rg -A 5 'bufnr|bufname|buffer' autoload/fern/
# Search for any existing buffer validation patterns
rg -A 2 'fern://' autoload/fern/
Length of output: 72035
Script:
#!/bin/bash
# Search for buffer validation and rejection handling
ast-grep --pattern 'function! s:reject_on_non_fern_buffer($_, $_) abort
$$$
endfunction'
# Search for buffer replacement and redraw logic
ast-grep --pattern 'function! fern#internal#buffer#replace($_, $_) abort
$$$
endfunction'
# Look for buffer event handling
rg -A 5 'BufEnter|WinEnter|BufLeave|WinLeave' autoload/fern/
Length of output: 5531
Close #514
Summary by CodeRabbit
New Features
Bug Fixes