msys2 path patches to make git functions work at least

The patch assumes that `plenary.nvim` has the changes I made
[in the corresponded PR](nvim-lua/plenary.nvim#663). At least for `plenary.utils` module usage
and bruteforce paths conversions in internal logic.

As stated in the `plenary`'s PR the msys2 integration is very fragile
so I left all my comments and test notifies for further debugging.

Author: shikorido

lua/telescope/_.lua

@@ -9,6 +9,10 @@ local utils = require "telescope.utils"
 
 local M = {}
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local AsyncJob = {}
 AsyncJob.__index = AsyncJob
 
@@ -31,6 +35,15 @@ function AsyncJob.new(opts)
     end
   end
 
+  --qqq
+  -- Due to explicit uv.spawn calls w/o plenary's Path/Job
+  -- we must adjust our path here as well
+  if U.is_msys2 then
+    opts.cwd = U.posix_to_windows(opts.cwd)
+    self.uv_opts.cwd = opts.cwd
+  end
+  --!qqq
+
   self.uv_opts.stdio = {
     self.stdin.handle,
     self.stdout.handle,

lua/telescope/actions/init.lua

@@ -69,6 +69,10 @@ local from_entry = require "telescope.from_entry"
 local transform_mod = require("telescope.actions.mt").transform_mod
 local resolver = require "telescope.config.resolve"
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local actions = setmetatable({}, {
   __index = function(_, k)
     error("Key does not exist for 'telescope.actions': " .. tostring(k))
@@ -591,6 +595,24 @@ actions.git_apply_stash = function(prompt_bufnr)
     return
   end
   actions.close(prompt_bufnr)
+  --qqq
+  --vim.notify("git_apply_stash: " .. vim.inspect(selection.value), vim.log.levels.ERROR)
+  if U.is_msys2 then
+    -- Either because I use zsh.exe or bash.exe (nvim's shell) handles "{}" specially
+    -- we need to escape it here. And in other places that use "{}" un-escaped.
+    -- Idk exactly why "{}" disappears from the final command
+    -- even when I add "{}" to escape chars in "plenary/job.lua:expand()"
+    -- (which is not called anyway).
+    -- utils.get_os_command_output { "echo", "$SHELL" } outputs { "$SHELL" }.
+    -- how can I test it exactly?
+    --
+    -- Changing "selection.value" itself due to bad experience with stash previewer.
+    if not selection.escaped then
+      selection.value = vim.fn.escape(selection.value, "{}")
+      selection.escaped = true
+    end
+  end
+  --!qqq
   local _, ret, stderr = utils.get_os_command_output { "git", "stash", "apply", "--index", selection.value }
   if ret == 0 then
     utils.notify("actions.git_apply_stash", {

lua/telescope/builtin/__git.lua

@@ -10,6 +10,10 @@ local entry_display = require "telescope.pickers.entry_display"
 local strings = require "plenary.strings"
 local Path = require "plenary.path"
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local conf = require("telescope.config").values
 local git_command = utils.__git_command
 
@@ -46,6 +50,10 @@ git.files = function(opts)
     git_command({ "-c", "core.quotepath=false", "ls-files", "--exclude-standard", "--cached" }, opts)
   )
 
+  --qqq
+  --vim.notify("git.files: " .. vim.inspect(opts), vim.log.levels.ERROR)
+  --!qqq
+
   pickers
     .new(opts, {
       prompt_title = "Git Files",
@@ -191,6 +199,13 @@ git.bcommits = function(opts)
   opts.git_command =
     vim.F.if_nil(opts.git_command, git_command({ "log", "--pretty=oneline", "--abbrev-commit", "--follow" }, opts))
 
+  --qqq
+  --vim.notify("git.bcommits: " .. vim.inspect(git_command) .. ", " .. vim.inspect(opts), vim.log.levels.ERROR)
+  --if U.is_msys2 then
+  --  opts.current_file = U.posix_to_windows(opts.current_file)
+  --end
+  --!qqq
+
   local title = "Git BCommits"
   local finder = finders.new_oneshot_job(
     utils.flatten {
@@ -371,6 +386,18 @@ git.status = function(opts)
 
   local args = { "status", "--porcelain=v1", "--", "." }
 
+  --qqq
+  -- Running "nvim ."->":Telescope git_status" ends up with posix-style path.
+  -- UPD. It gets fixed in later invocations.
+  --if opts.cwd:find("^/") then
+  --  if U.is_msys2 then
+  --    opts.cwd = U.posix_to_windows(opts.cwd)
+  --  end
+  --  --vim.notify("git.status: opts.cwd = " .. vim.inspect(opts.cwd), vim.log.levels.ERROR)
+  --  --error(debug.traceback())
+  --end
+  --!qqq
+
   local gen_new_finder = function()
     if vim.F.if_nil(opts.expand_dir, true) then
       table.insert(args, #args - 1, "-uall")
@@ -404,6 +431,13 @@ git.status = function(opts)
             end
           end
 
+          --qqq
+          -- If we have no changes and status is empty why git_status does not exit
+          -- with notification? Is it supposed to be like that, right?
+          -- On "v0.1.8" version I get notification and Telescope just exits as it should be.
+          --vim.notify("git.status: self.finder =  " .. vim.inspect(self.finder) .. ", count = " .. vim.inspect(count) .. ", prompt = " .. vim.inspect(prompt) , vim.log.levels.WARN)
+          --!qqq
+
           if count == 0 and prompt == "" then
             utils.notify("builtin.git_status", {
               msg = "No changes found",
@@ -479,6 +513,15 @@ local set_opts_cwd = function(opts)
     opts.cwd = vim.loop.cwd()
   end
 
+  --qqq
+  -- Running "nvim ."->":Telescope git_status" ends up with posix-style path
+  --vim.notify("set_opts_cwd: opts = " .. vim.inspect(opts), vim.log.levels.ERROR)
+  --error(debug.traceback())
+  if U.is_msys2 then
+     opts.cwd = U.posix_to_windows(opts.cwd)
+  end
+  --!qqq
+
   local toplevel, ret = utils.get_os_command_output({ "git", "rev-parse", "--show-toplevel" }, opts.cwd)
 
   if ret ~= 0 then

lua/telescope/previewers/buffer_previewer.lua

@@ -8,6 +8,10 @@ local global_state = require "telescope.state"
 
 local pscan = require "plenary.scandir"
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local buf_delete = utils.buf_delete
 local git_command = utils.__git_command
 
@@ -830,10 +834,37 @@ previewers.git_stash_diff = defaulter(function(opts)
   return previewers.new_buffer_previewer {
     title = "Git Stash Preview",
     get_buffer_by_name = function(_, entry)
+      --qqq
+      if not entry.escaped then
+        entry.value = vim.fn.escape(entry.value, "{}")
+        entry.escaped = true
+      end
+      --!qqq
       return entry.value
     end,
 
     define_preview = function(self, entry, _)
+      --qqq
+      if U.is_msys2 then
+        -- Either because I use zsh.exe or bash.exe (nvim's shell) handles "{}" specially
+        -- we need to escape it here. And in other places that use "{}" un-escaped.
+        -- Idk exactly why "{}" disappears from the final command
+        -- even when I add "{}" to escape chars in "plenary/job.lua:expand()"
+        -- (which is not called anyway).
+        -- utils.get_os_command_output { "echo", "$SHELL" } outputs { "$SHELL" },
+        -- how can I test it exactly?
+        --
+        -- Could be done just in case cause it is in posix-style.
+        --opts.cwd = U.posix_to_windows(opts.cwd)
+        -- If we do not change "entry.value" itself for each unique entry it ends up with an error
+        -- when passed directly escaped like "vim.fn.escape(entry.value)".
+        if not entry.escaped then
+          entry.value = vim.fn.escape(entry.value, "{}")
+          entry.escaped = true
+        end
+      --vim.notify("git_stash_diff: opts = " .. vim.inspect(opts) .. ", entry = " .. vim.inspect(entry) .. ", self = " .. vim.inspect(self), vim.log.levels.WARN)
+      end
+      --!qqq
       local cmd = git_command({ "--no-pager", "stash", "show", "-p", entry.value }, opts)
       putils.job_maker(cmd, self.state.bufnr, {
         value = entry.value,

lua/telescope/previewers/utils.lua

@@ -5,6 +5,10 @@ local conf = require("telescope.config").values
 local Job = require "plenary.job"
 local Path = require "plenary.path"
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local telescope_utils = require "telescope.utils"
 
 local utils = {}
@@ -67,6 +71,15 @@ utils.job_maker = function(cmd, bufnr, opts)
   -- if passed, they will be use as the cache key
   -- if any of them are missing, cache will be skipped
   if opts.bufname ~= opts.value or not opts.bufname or not opts.value then
+
+    --qqq
+    -- Will it be better to change self._raw_cwd in plenary's Job:_execute method?
+    -- UPD. Making the path transformation in Job:new() solves "nvim ."->":Telescope git_commits"
+    --if U.is_msys2 then
+    --  opts.cwd = U.posix_to_windows(opts.cwd)
+    --end
+    --!qqq
+
     local command = table.remove(cmd, 1)
     local writer = (function()
       if opts.writer ~= nil then

lua/telescope/utils.lua

@@ -8,6 +8,10 @@
 local Path = require "plenary.path"
 local Job = require "plenary.job"
 
+--qqq
+local U = require "plenary.utils"
+--!qqq
+
 local log = require "telescope.log"
 
 local truncate = require("plenary.strings").truncate
@@ -67,7 +71,15 @@ utils.path_expand = function(path)
   end
 
   if path:sub(1, 1) == "~" then
-    local home = vim.loop.os_homedir() or "~"
+    --qqq
+    -- vim.loop.os_homedir() ignores HOME env variable in msys2
+    if U.is_msys2 then
+      local home = vim.fn.expand("~") or "~"
+    else
+      local home = vim.loop.os_homedir() or "~"
+    end
+    --!qqq
+    --local home = vim.loop.os_homedir() or "~"
     if home:sub(-1) == "\\" or home:sub(-1) == "/" then
       home = home:sub(1, -2)
     end
@@ -561,6 +573,15 @@ function utils.get_os_command_output(cmd, cwd)
     })
     return {}
   end
+  --qqq
+  -- Running "nvim ."->":Telescope git_status" ends up with posix-style path
+  -- UPD. Changing set_opts_cwd solves it.
+  --if cwd:find("^/") then
+  --  vim.notify("get_os_command_output: cmd = " .. vim.inspect(cmd) .. ", cwd = " .. vim.inspect(cwd), vim.log.levels.ERROR)
+  --  error(debug.traceback())
+  --end
+  --vim.notify("get_os_command_output: " .. vim.inspect(cmd) .. ", " .. vim.inspect(cwd), vim.log.levels.ERROR)
+  --!qqq
   local command = table.remove(cmd, 1)
   local stderr = {}
   local stdout, ret = Job:new({