nvim(completion): Add new sources for gitcommit

This includes handle completion (requires `sort`, `git` and `jq`) and
keyword completion.

.config/nvim/lua/completion-sources/gitcommit-keywords.lua

@@ -0,0 +1,76 @@
+local M = {}
+
+local registered = false
+
+M.setup = function(handle_file)
+  if registered then
+    return
+  end
+  registered = true
+
+  local has_cmp, cmp = pcall(require, 'cmp')
+  if not has_cmp then
+    return
+  end
+
+  local source = {}
+
+  source.new = function()
+    return setmetatable({}, {__index = source})
+  end
+
+  source.get_keyword_pattern = function()
+    -- Add dot to existing keyword characters (\k).
+    return [[\%(\k\|\.\)\+]]
+  end
+
+  source.complete = function(_, request, callback)
+    local input = string.sub(request.context.cursor_before_line, request.offset - 1)
+    -- local prefix = string.sub(request.context.cursor_before_line, 1, request.offset - 1)
+
+    local gitcommit_keywords = {
+        'Addresses:',
+        'Co-Authored-By:',
+        'Resolves:',
+        'Approved-by:',
+        'Reviewed-by:',
+        'Signed-off-by:',
+    }
+
+    if request.context.cursor.col <= 2 then
+      local items = {}
+      for _, keyword in ipairs(gitcommit_keywords) do
+        table.insert(items, {
+            filterText = keyword,
+            label = keyword,
+            textEdit = {
+              newText = keyword,
+              range = {
+                start = {
+                  line = request.context.cursor.row - 1,
+                  character = request.context.cursor.col - 1 - #input,
+                },
+                ['end'] = {
+                  line = request.context.cursor.row - 1,
+                  character = request.context.cursor.col - 1,
+                },
+              },
+            },
+          }
+        )
+      end
+      callback {
+        items = items,
+        isIncomplete = true,
+      }
+    else
+      callback({isIncomplete = true})
+    end
+  end
+
+  cmp.register_source('gitcommit_keywords', source.new())
+
+end
+
+return M
+

.config/nvim/lua/completion-sources/handles.lua

@@ -0,0 +1,116 @@
+local handles = {}
+
+local Job = require('plenary.job')
+
+local registered = false
+
+local register_source = function(json_string)
+  if registered then
+    return
+  end
+  registered = true
+
+  local has_cmp, cmp = pcall(require, 'cmp')
+  if not has_cmp then
+    return
+  end
+  local success, handles_with_names_and_emails = pcall(function()
+    return vim.fn.json_decode(json_string)
+  end)
+
+  if not success then
+    return
+  end
+
+  local source = {}
+
+  source.new = function()
+    return setmetatable({}, {__index = source})
+  end
+
+  source.get_trigger_characters = function()
+    return { '@' }
+  end
+
+  source.get_keyword_pattern = function()
+    -- Add dot to existing keyword characters (\k).
+    return [[\%(\k\|\.\)\+]]
+  end
+
+  source.complete = function(_, request, callback)
+    local input = string.sub(request.context.cursor_before_line, request.offset - 1)
+    local prefix = string.sub(request.context.cursor_before_line, 1, request.offset - 1)
+
+    if vim.startswith(input, '@') and (prefix == '@' or vim.endswith(prefix, ' @')) then
+      local items = {}
+      for handle, name_and_email in pairs(handles_with_names_and_emails) do
+        table.insert(items, {
+            filterText = handle .. ' ' .. name_and_email,
+            label = name_and_email,
+            textEdit = {
+              newText = name_and_email,
+              range = {
+                start = {
+                  line = request.context.cursor.row - 1,
+                  character = request.context.cursor.col - 1 - #input,
+                },
+                ['end'] = {
+                  line = request.context.cursor.row - 1,
+                  character = request.context.cursor.col - 1,
+                },
+              },
+            },
+          }
+        )
+      end
+      callback {
+        items = items,
+        isIncomplete = true,
+      }
+    else
+      callback({isIncomplete = true})
+    end
+  end
+
+  cmp.register_source('handles', source.new())
+end
+
+handles.setup = function()
+    local json_lines = {}
+
+    Job:new({
+        command = 'jq',
+        args = {'-s', '--compact-output', [[
+            map (select(keys[] != "jenkins" and keys[] != "terrier-lottery-results-domain"))
+            | reduce .[] as $item ({}; . + $item)
+        ]]},
+        writer = Job:new({
+            command = 'sed',
+            args = {'-r', '-e', '/<>/d',
+                    '-e', 's/"//g',
+                    '-e', 's/^(.*<([^@]+)@.*)$/{"\\2": "\\1"}/'},
+            writer = Job:new({
+                command = 'sort',
+                args = {'-u'},
+                writer = Job:new({
+                    command = 'git',
+                    args = { 'log', '--oneline', '--format=format:%aN <%ae>'},
+                    }),
+                }),
+        }),
+        on_stdout = function(_, line)
+            table.insert(json_lines, line)
+        end,
+        on_exit = function(_, _)
+             local timer = vim.loop.new_timer()
+            timer:start(0, 0, vim.schedule_wrap(function()
+              register_source(json_lines)
+            end))
+        end
+    }):start()
+
+end
+
+
+                        return handles
+

.config/nvim/lua/plugins/nvim-cmp.lua

@@ -1,67 +1,76 @@
 local M = {}
 
 function M.setup ()
-    -- vim.g.cpp_simple_highlight = 1
+    local setup_cmp = function()
+      local cmp = require('cmp')
 
-    vim.cmd[[hi default LspCxxHlGroupNamespace ctermfg=Yellow guifg=#E5C07B cterm=none gui=none]]
-    vim.cmd[[hi default LspCxxHlGroupMemberVariable ctermfg=White guifg=#F16E77]]
+      cmp.setup({
+        snippet = {
+          expand = function(args)
+            -- vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+            require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+            -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+            -- require'snippy'.expand_snippet(args.body) -- For `snippy` users.
+          end,
+        },
+        mapping = {
+          ['<c-n>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
+          ['<c-p>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
+          ['<Tab>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
+          ['<S-Tab>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
+          ['<C-d>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
+          ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
+          ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
+          ['<C-y>'] = cmp.config.disable, -- If you want to remove the default `<C-y>` mapping, You can specify `cmp.config.disable` value.
+          ['<C-e>'] = cmp.mapping({
+            i = cmp.mapping.abort(),
+            c = cmp.mapping.close(),
+          }),
+          ['<CR>'] = nil,
+          ['<C-c>'] = cmp.mapping.confirm({ select = true }),
+        },
+        sources = cmp.config.sources({
+          { name = 'neorg' },
+          { name = 'nvim_lsp' },
+          -- { name = 'vsnip' }, -- For vsnip users.
+          -- { name = 'ultisnips' }, -- For ultisnips users.
+          -- { name = 'snippy' }, -- For snippy users.
+          { name = 'path' },
+          { name = 'buffer' },
+        })
+      })
 
-  local cmp = require'cmp'
+      -- Use buffer source for `/`.
+      cmp.setup.cmdline('/', {
+        sources = {
+          { name = 'buffer' },
+        }
+      })
 
-  cmp.setup({
-    snippet = {
-      expand = function(args)
-        -- vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
-        require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
-        -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
-        -- require'snippy'.expand_snippet(args.body) -- For `snippy` users.
-      end,
-    },
-    mapping = {
-      ['<c-n>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
-      ['<c-p>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
-      ['<Tab>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
-      ['<S-Tab>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
-      ['<C-d>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
-      ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
-      ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
-      ['<C-y>'] = cmp.config.disable, -- If you want to remove the default `<C-y>` mapping, You can specify `cmp.config.disable` value.
-      ['<C-e>'] = cmp.mapping({
-        i = cmp.mapping.abort(),
-        c = cmp.mapping.close(),
-      }),
-      ['<CR>'] = nil,
-      ['<C-c>'] = cmp.mapping.confirm({ select = true }),
-    },
-    sources = cmp.config.sources({
-      { name = 'neorg' },
-      { name = 'nvim_lsp' },
-      -- { name = 'vsnip' }, -- For vsnip users.
-      { name = 'luasnip' }, -- For luasnip users.
-      -- { name = 'ultisnips' }, -- For ultisnips users.
-      -- { name = 'snippy' }, -- For snippy users.
-      { name = 'path' },
-    }, {
-      { name = 'buffer' },
-    })
-  })
+      -- Use cmdline & path source for ':'.
+      cmp.setup.cmdline(':', {
+        sources = cmp.config.sources({
+          { name = 'path' },
+          { name = 'cmdline' },
+        })
+      })
 
-  -- Use buffer source for `/`.
-  cmp.setup.cmdline('/', {
-    sources = {
-      { name = 'buffer' },
-    }
-  })
+      cmp.setup.filetype('gitcommit', {
+        sources = cmp.config.sources({
+          { name = 'handles' },
+          { name = 'gitcommit_keywords' },
+        }),
+      })
+    end
 
-  -- Use cmdline & path source for ':'.
-  cmp.setup.cmdline(':', {
-    sources = cmp.config.sources({
-      { name = 'path' }
-    }, {
-      { name = 'cmdline' }
-    })
-  })
+    require('completion-sources.handles').setup()
+    require('completion-sources.gitcommit-keywords').setup()
+    setup_cmp()
 
 end
 
+    vim.cmd[[hi default LspCxxHlGroupNamespace ctermfg=Yellow guifg=#E5C07B cterm=none gui=none]]
+    vim.cmd[[hi default LspCxxHlGroupMemberVariable ctermfg=White guifg=#F16E77]]
+
+
 return M