Occupied space % of mounted units in the statusline

Question

I would like to show the used space percentage of mounted devices on the statusline, when are selected with the cursor, is that feasible? thank you in advance

Answer 1

So you want to show size of all selected files divided by capacity of the drive in which current directory is located? I assume that's the case below.

While Vifm has statusline macros for both, there isn't one for their ratio. It's possible to either use %{} syntax with a script or do it in Lua, however neither option will have access to size cache of Vifm.

Comments

as you pointed me out, my initial idea would encounter problems in a multiselection, so I would like to use %d and show this output from inside the path.

assuming that's the only output I want on statusline, I was trying something in the line of

set statusline="%{system('df -h %d | awk 'NR==2 {print $5}' ')}"

but, for what I can see, quotes are wrong and %d is not correctly escaped.

Is this semi-solution fixable?

---

The catch is that there is no way to escape } inside %{}, so I used sed instead:

set statusline="%{ system(expand('df -h %d') . '| sed -n ''2s/.* \\([0-9]\\+%\\).*/\\1/p''') }"

---

thank you for this working solution!
if I can't use awk, can this shell command works inside %{}?

df -h %d | sed 1d | cut -d ' ' -f 3,9

it returns me the total size too and it's more readable for me.
can I ask how expand expression comes to my help?

---

On its own cut won't produce reliable results on sequences of separators, but with tr, it should work fine:

set statusline="%{ system(expand(\"df -h %d | sed 1d | tr -s ' ' | cut -d ' ' -f 3,5\")) }"

expand() is needed to expand %d, but it dropped if %d is replaced with a dot:

set statusline="%{ system(\"df -h . | sed 1d | tr -s ' ' | cut -d ' ' -f 3,5\") }"

---

lovely, thank you <3

Answer 2

i just tried the lua way. the following code worked on my side with some hardcode, though i could not find a reliable way to invalidate the cache, gathered.

--the lua part
do
  local gathered = {}
  local function gather_used_pcent(dir)
    if gathered[dir] == nil then
      local file = assert(io.popen("df --output=pcent " .. dir, "r"))
      local output = file:read("*a")
      file:close()
      gathered[dir] = string.sub(output, #"Use%\n")
    end
    return gathered[dir]
  end

  assert(vifm.addhandler({
    name = "statusline",
    handler = function()
      local used_pcent = gather_used_pcent(vifm.currview().cwd)
      return { format = "%o %A %u:%g %= %s %d " .. used_pcent }
    end,
  }))
end

" the vifmrc part
set statusline=#thatplugin#statusline