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Use fresh temp files for every diff

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Originally the plugin used fresh temp files for every diff.  But it
wrote to those files with `:write` which made Vim's buffer numbers
increase unnecessarily (see #297) so the plugin changed to reuse the
same temp files each time (see a871d857).

However this has the problem that after Vim has been open for a while,
e.g. a few days, the operating system can clean up the temp directory
holding those temp files.  The next time the plugin runs a diff, Vim
throws an error because it cannot write to the temp files because their
directory has disappeared (see #395, #433).

In the meantime the plugin changed how it writes the temp files to
use `writefile()` (see 4e911819).  This removed the problem of rapidly
increasing buffer numbers.

Now the buffer number problem has gone, the plugin can revert to using
fresh temp files each time.
This commit is contained in:
Andy Stewart
2020-04-23 16:47:03 +01:00
parent 425c7cf2e2
commit dab840b153
1 changed files with 5 additions and 5 deletions
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10
autoload/gitgutter/diff.vim
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@@ -12,9 +12,6 @@ endfunction
let s:c_flag = s:git_supports_command_line_config_override()
let s:temp_from = tempname()
let s:temp_buffer = tempname()
let s:counter = 0
" Returns a diff of the buffer against the index or the working tree.
@@ -78,6 +75,9 @@ function! gitgutter#diff#run_diff(bufnr, from, preserve_full_diff) abort
throw 'gitgutter not tracked'
endif
let temp_from = tempname()
let temp_buffer = tempname()
" Wrap compound commands in parentheses to make Windows happy.
" bash doesn't mind the parentheses.
let cmd = '('
@@ -90,7 +90,7 @@ function! gitgutter#diff#run_diff(bufnr, from, preserve_full_diff) abort
" second gitgutter#process_buffer() writing the file (synchronously, below)
" and the first gitgutter#process_buffer()'s async job reading it (with
" git-diff).
let buff_file = s:temp_buffer.'.'.a:bufnr
let buff_file = temp_buffer.'.'.a:bufnr
" Add a counter to avoid a similar race with two quick writes of the same buffer.
" Use a modulus greater than a maximum reasonable number of visible buffers.
@@ -110,7 +110,7 @@ function! gitgutter#diff#run_diff(bufnr, from, preserve_full_diff) abort
" Without the buffer number, from_file would have a race in the shell
" between the second process writing it (with git-show) and the first
" reading it (with git-diff).
let from_file = s:temp_from.'.'.a:bufnr
let from_file = temp_from.'.'.a:bufnr
" Add a counter to avoid a similar race with two quick writes of the same buffer.
let from_file .= '.'.s:counter