fix(vim): resolve <Tab> conflict between copilot and snipMate - #10
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copilot.vim maps <Tab> in insert mode by default, which collided with vim-snipmate's `imap <unique> <Tab>` and raised E227 at startup. Set g:copilot_no_tab_map before plug#end() so <Tab> stays with snipMate, and accept Copilot suggestions with <C-L> instead.
Add a path-filtered Vim workflow that runs only when Vim files change. It installs every declared plugin via vim-plug (excluding the heavy YouCompleteMe native build) and asserts the vimrc sources without an E227 <Tab> mapping conflict, locking in the copilot/snipMate fix from this branch.
The install step ran vim without -u, so the vimrc (and thus plug#begin / PlugInstall) was never sourced and no plugins installed — which also made the E227 check pass vacuously. Pass -u "$HOME/.vimrc" so PlugInstall runs, and fail loudly if plugged/ ends up empty.
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Summary
copilot.vimmaps<Tab>in insert mode by default, which collided withvim-snipmate'simap <unique> <Tab>and raised E227: Mapping already exists for at every Vim startup. Found while verifying the vim-plug setup.Fix
g:copilot_no_tab_map = v:truebeforeplug#end()(copilot installs its mapping while its plugin is sourced there), so<Tab>stays with snipMate.<C-L>instead.CI guard
Adds a path-filtered
Vimworkflow (.github/workflows/vim.yml) that runs only when Vim files change. It installs every declared plugin via vim-plug (excluding the heavy YouCompleteMe native build) and asserts the vimrc sources with no E227, locking in this fix against regressions.Verification (headless)
After the change:
imap <Tab>→<Plug>snipMateNextOrTriggerimap <C-L>→copilot#Accept()