refactor: run the pager in neogit.lib.git.diff build_pager_contents()

Author: stevenxxiu

lua/neogit/buffers/common.lua

@@ -26,37 +26,14 @@ M.Diff = Component.new(function(diff)
 end)
 
 M.DiffHunks = Component.new(function(diff)
-  local hunk_props = vim
-    .iter(diff.hunks)
-    :map(function(hunk)
-      local header = diff.lines[hunk.diff_from]
-      local content = vim.list_slice(diff.lines, hunk.diff_from + 1, hunk.diff_to)
-      local job = nil
-      if config.values.log_pager ~= nil then
-        job = vim.system(config.values.log_pager, { stdin = true })
-        for _, part in ipairs { diff.header, { header }, content } do
-          for _, line in ipairs(part) do
-            job:write(line .. "\n")
-          end
-        end
-        job:write()
-      end
-
-      return {
-        header = header,
-        content = content,
-        job = job,
-        hunk = hunk,
-        folded = hunk._folded,
-      }
-    end)
-    :totable()
-
-  if config.values.log_pager ~= nil then
-    vim.iter(hunk_props):each(function(hunk)
-      hunk.content = vim.split(hunk.job:wait().stdout, "\n")
-      hunk.job = nil
-    end)
+  local hunk_props = {}
+  for i, hunk in ipairs(diff.hunks) do
+    table.insert(hunk_props, {
+      header = diff.lines[hunk.diff_from],
+      content = diff.pager_contents[i],
+      hunk = hunk,
+      folded = hunk._folded,
+    })
   end
 
   return col.tag("DiffContent") {

lua/neogit/lib/git/diff.lua

@@ -1,6 +1,7 @@
 local a = require("plenary.async")
 local git = require("neogit.lib.git")
 local util = require("neogit.lib.util")
+local config = require("neogit.config")
 local logger = require("neogit.logger")
 
 local insert = table.insert
@@ -12,13 +13,13 @@ local sha256 = vim.fn.sha256
 ---@field staged_stats fun(): DiffStagedStats
 ---
 ---@class Diff
----@field header string[]
 ---@field kind string
 ---@field lines string[]
 ---@field file string
 ---@field info table
 ---@field stats table
 ---@field hunks Hunk
+---@field pager_contents string[]
 ---
 ---@class DiffStats
 ---@field additions number
@@ -214,25 +215,61 @@ local function build_hunks(lines)
   return hunks
 end
 
+---@param diff_header string[]
+---@param lines string[]
+---@param hunks Hunk[]
+---@return string[][]
+local function build_pager_contents(diff_header, lines, hunks)
+  local res = {}
+  local jobs = {}
+  vim.iter(hunks):each(function(hunk)
+    local header = lines[hunk.diff_from]
+    local content = vim.list_slice(lines, hunk.diff_from + 1, hunk.diff_to)
+    if config.values.log_pager == nil then
+      insert(res, content)
+      return
+    end
+
+    local job = vim.system(config.values.log_pager, { stdin = true })
+    for _, part in ipairs { diff_header, { header }, content } do
+      for _, line in ipairs(part) do
+        job:write(line .. "\n")
+      end
+    end
+    job:write()
+    insert(jobs, job)
+  end)
+
+  if config.values.log_pager ~= nil then
+    vim.iter(jobs):each(function(job)
+      local content = vim.split(job:wait().stdout, "\n")
+      insert(res, content)
+    end)
+  end
+
+  return res
+end
+
 ---@param raw_diff string[]
 ---@param raw_stats string[]
 ---@return Diff
 local function parse_diff(raw_diff, raw_stats)
   local header, start_idx = build_diff_header(raw_diff)
   local lines = build_lines(raw_diff, start_idx)
   local hunks = build_hunks(lines)
+  local pager_contents = build_pager_contents(header, lines, hunks)
   local kind, info = build_kind(header)
   local file = build_file(header, kind)
   local stats = parse_diff_stats(raw_stats or {})
 
   return { ---@type Diff
-    header = header,
     kind = kind,
     lines = lines,
     file = file,
     info = info,
     stats = stats,
     hunks = hunks,
+    pager_contents = pager_contents,
   }
 end