Merge branch 'relative_time' into develop

Author: George Sofianos

README.md

@@ -90,6 +90,16 @@ Default: `'%d/%m/%y %H:%M'`
 let g:blamer_date_format = '%d/%m/%y'
 ```
 
+### Relative time
+
+Shows commit date in relative format
+
+Default: `0`
+
+```
+let g:blamer_relative_time = 1
+```
+
 #### Highlight
 
 The color of the blame message.

autoload/blamer.vim

@@ -22,10 +22,46 @@ endif
 let s:blamer_delay = get(g:, 'blamer_delay', 1000)
 let s:blamer_show_in_visual_modes = get(g:, 'blamer_show_in_visual_modes', 1)
 let s:blamer_timer_id = -1
+let s:blamer_relative_time = get(g:, 'blamer_relative_time', 0)
 
 let s:is_windows = has('win16') || has('win32') || has('win64') || has('win95')
 let s:missing_popup_feature = !has('nvim') && !exists('*popup_create')
 
+function! s:GetRelativeTime(commit_timestamp) abort
+  let l:current_timestamp = localtime()
+  let l:elapsed = l:current_timestamp - a:commit_timestamp
+
+  let l:minute_seconds = 60
+  let l:hour_seconds = l:minute_seconds * 60
+  let l:day_seconds = l:hour_seconds * 24
+  let l:month_seconds = l:day_seconds * 30
+  let l:year_seconds = l:month_seconds * 12
+
+  " We have no info how long ago line saved
+  if(l:elapsed == 0)
+    return 'a while ago'
+  endif
+
+  let l:ToPlural = {word,number -> number > 1 ? word . 's' : word}
+  let l:ToRelativeString = {time,divisor,time_word -> string(float2nr(round(time / divisor))) . l:ToPlural(' ' . time_word, float2nr(round(time / divisor))) . ' ago'}
+
+
+  if l:elapsed < l:minute_seconds
+    return l:ToRelativeString(l:elapsed,1,'second')
+  elseif l:elapsed < l:hour_seconds
+    return l:ToRelativeString(l:elapsed,60,'minute')
+  elseif l:elapsed < l:day_seconds
+    return l:ToRelativeString(l:elapsed,l:hour_seconds,'hour')
+  elseif l:elapsed < l:month_seconds
+    return l:ToRelativeString(l:elapsed,l:day_seconds,'day')
+  elseif l:elapsed < l:year_seconds
+    return l:ToRelativeString(l:elapsed,l:month_seconds,'month')
+  else
+    return l:ToRelativeString(l:elapsed,l:year_seconds,'year')
+  endif
+
+endfunction
+
 function! s:Head(array) abort
   if len(a:array) == 0
     return ''
@@ -93,7 +129,11 @@ function! blamer#GetMessage(file, line_number, line_count) abort
     let l:property = l:words[0]
     let l:value = join(l:words[1:], ' ')
     if  l:property =~? 'time'
-      let l:value = strftime(s:blamer_date_format, l:value)
+      if(s:blamer_relative_time)
+        let l:value = s:GetRelativeTime(l:value)
+      else
+        let l:value = strftime(s:blamer_date_format, l:value)
+      endif
     endif
     let l:value = escape(l:value, '&')
     let l:value = escape(l:value, '~')