gutentags_file_list_command doesn't work, but update_tags.sh does

[faisal-shah]

I have the identical problem to #208. Running update_tags.sh works like a charm (with the exception of tags.log not being generated):

$ ~/.vim/plugged/vim-gutentags/plat/unix/update_tags.sh -e ctags -t tags -p . -L 'ag -l' -l tags.log
Locking tags file...
Running file list command
eval ag -l > "tags.files"
Running ctags on whole project
ctags -f "tags.temp" -L "tags.files"
Replacing tags file
mv -f "tags.temp" "tags"
Unlocking tags file...
Done.

However, in Vim it doesn't work. Below is the :messages output:

gutentags: Scanning buffer '/home/dev/repos/project/main.c' for gutentags setup...
gutentags: No specific project type.
gutentags: Setting gutentags for buffer '/home/dev/repos/project/main.c'

gutentags: Generating missing tags file: /home/dev/repos/project/tags
gutentags: Wildignore options file is up to date.
gutentags: Running: ['/home/dev/.vim/plugged/vim-gutentags/plat/unix/update_tags.sh', '-e', 'ctags', '-t', 'tag
s', '-p', '.', '-L', 'ag -l', '-l', 'tags.log']
gutentags: In: /home/dev/repos/project/speed
gutentags: [job stdout]: 'Locking tags file...'
gutentags: [job stdout]: 'Running file list command'
gutentags: [job stdout]: 'eval ag -l > "tags.files"'

... and then nothing.

Not using g:gutentags_cache_dir.

$ vim --version
VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Feb 21 2021 21:02:22)
Included patches: 1-2539
Modified by jonathon.fernyhough@york.ac.uk
Compiled by jonathon.fernyhough@york.ac.uk
Huge version with GTK3 GUI. Features included (+) or not (-):
+acl -farsi +mouse_sgr +tag_binary
+arabic +file_in_path -mouse_sysmouse -tag_old_static
+autocmd +find_in_path +mouse_urxvt -tag_any_white
+autochdir +float +mouse_xterm +tcl
-autoservername +folding +multi_byte +termguicolors
+balloon_eval -footer +multi_lang +terminal
+balloon_eval_term +fork() -mzscheme +terminfo
+browse +gettext +netbeans_intg +termresponse
++builtin_terms -hangul_input +num64 +textobjects
+byte_offset +iconv +packages +textprop
+channel +insert_expand +path_extra +timers
+cindent +ipv6 +perl +title
+clientserver +job +persistent_undo +toolbar
+clipboard +jumplist +popupwin +user_commands
+cmdline_compl +keymap +postscript +vartabs
+cmdline_hist +lambda +printer +vertsplit
+cmdline_info +langmap +profile +virtualedit
+comments +libcall -python +visual
+conceal +linebreak +python3 +visualextra
+cryptv +lispindent +quickfix +viminfo
+cscope +listcmds +reltime +vreplace
+cursorbind +localmap +rightleft +wildignore
+cursorshape +lua +ruby +wildmenu
+dialog_con_gui +menu +scrollbind +windows
+diff +mksession +signs +writebackup
+digraphs +modify_fname +smartindent +X11
+dnd +mouse +sound -xfontset
-ebcdic +mouseshape +spell +xim
+emacs_tags +mouse_dec +startuptime +xpm
+eval +mouse_gpm +statusline +xsmp_interact
+ex_extra -mouse_jsbterm -sun_workshop +xterm_clipboard
+extra_search +mouse_netterm +syntax -xterm_save
$ uname -a
Linux dev-vm 5.8.0-45-generic #51~20.04.1-Ubuntu SMP Tue Feb 23 13:46:31 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ ctags --version
Universal Ctags 0.0.0, Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
Compiled: Jan 6 2019, 23:23:29
URL: https://ctags.io/
Optional compiled features: +wildcards, +regex, +iconv, +option-directory, +xpath, +json, +interactive, +sandbox, +yaml

[jocko]

You can use unbuffer to make this work. Specify your file list command as unbuffer ag -l