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feat(highlight): add highlights.overrides config table

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Problem: users had no config-level way to override computed highlight
groups and had to call nvim_set_hl externally.

Solution: add highlights.overrides table that maps group names to
highlight definitions. Overrides are applied after all computed groups
without default = true, so they always win over both computed defaults
and colorscheme definitions.
This commit is contained in:
Barrett Ruth 2026-02-07 15:47:36 -05:00
parent b7477e3af2
commit a9eea9c157
2 changed files with 26 additions and 0 deletions
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8
lua/diffs/init.lua
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@ -19,6 +19,7 @@
---@field background boolean
---@field gutter boolean
---@field blend_alpha? number
---@field overrides? table<string, vim.api.keyset.highlight>
---@field context diffs.ContextConfig
---@field treesitter diffs.TreesitterConfig
---@field vim diffs.VimConfig
@ -229,6 +230,12 @@ local function compute_highlight_groups()
)
vim.api.nvim_set_hl(0, 'DiffsDiffChange', { default = true, bg = diff_change.bg })
vim.api.nvim_set_hl(0, 'DiffsDiffText', { default = true, bg = diff_text.bg })
if config.highlights.overrides then
for group, hl in pairs(config.highlights.overrides) do
vim.api.nvim_set_hl(0, group, hl)
end
end
end
local function init()
@ -251,6 +258,7 @@ local function init()
['highlights.background'] = { opts.highlights.background, 'boolean', true },
['highlights.gutter'] = { opts.highlights.gutter, 'boolean', true },
['highlights.blend_alpha'] = { opts.highlights.blend_alpha, 'number', true },
['highlights.overrides'] = { opts.highlights.overrides, 'table', true },
['highlights.context'] = { opts.highlights.context, 'table', true },
['highlights.treesitter'] = { opts.highlights.treesitter, 'table', true },
['highlights.vim'] = { opts.highlights.vim, 'table', true },