Add support for HGEDITOR similar to GIT_EDITOR

Author: martintrojer

README.md

@@ -268,6 +268,7 @@ Default: `['.project', '.git', '.hg', '.svn', '.root']`
 
 Type `Boolean`. Whether to override `$GIT_EDITOR` in floaterm terminals so git commands can
 open open an editor in the same neovim instance. See [git](#git) for details.
+This flag also overrides `$HGEDITOR` for Mercurial.
 
 Default: `v:true`
 

autoload/floaterm/edita/neovim/editor.vim

@@ -5,13 +5,14 @@ function! floaterm#edita#neovim#editor#open(target, client)
   call floaterm#util#open([{'filename': fnameescape(a:target)}], opener)
   let mode = floaterm#edita#neovim#util#mode(a:client)
   let b:edita = sockconnect(mode, a:client, { 'rpc': 1 })
-  if index([
+  let filename = expand('%:t')
+  if (index([
         \ 'COMMIT_EDITMSG',
         \ 'MERGE_MSG',
         \ 'git-rebase-todo',
         \ 'git-revise-todo',
-        \ 'addp-hunk-edit.diff'
-        \ ], expand('%:t')) > -1
+        \ 'addp-hunk-edit.diff',
+        \ ], filename) > -1) || (stridx(filename, 'commit.hg.txt') > -1)
     setlocal bufhidden=wipe
     augroup edita_buffer
       autocmd! * <buffer>

autoload/floaterm/edita/vim/editor.vim

@@ -5,13 +5,14 @@ function! floaterm#edita#vim#editor#open(target, bufnr)
   let opener = floaterm#config#get(a:bufnr, 'opener', g:floaterm_opener)
   call floaterm#util#open([{'filename': fnameescape(a:target)}], opener)
   let b:edita = a:bufnr
-  if index([
+  let filename = expand('%:t')
+  if (index([
         \ 'COMMIT_EDITMSG',
         \ 'MERGE_MSG',
         \ 'git-rebase-todo',
         \ 'git-revise-todo',
-        \ 'addp-hunk-edit.diff'
-        \ ], expand('%:t')) > -1
+        \ 'addp-hunk-edit.diff',
+        \ ], filename) > -1) || (stridx(filename, 'commit.hg.txt') > -1)
     setlocal bufhidden=wipe
     augroup edita_buffer
       autocmd! * <buffer>

autoload/floaterm/util.vim

@@ -162,6 +162,7 @@ function! floaterm#util#setenv() abort
   let env.FLOATERM = editor
   if g:floaterm_giteditor
     let env.GIT_EDITOR = editor
+    let env.HGEDITOR = editor
   endif
   return env
 endfunction