From 07ffdf4fc7bb747bbccdb912e015a7e9d1ad0de2 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Tue, 11 Jun 2019 00:46:04 +1200
Subject: Move :PutDate and :UTC implementations into plugin

---
 vim/plugin/put_date.vim | 11 +++++++++++
 vim/plugin/utc.vim      | 31 +++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 vim/plugin/put_date.vim
 create mode 100644 vim/plugin/utc.vim

(limited to 'vim/plugin')

diff --git a/vim/plugin/put_date.vim b/vim/plugin/put_date.vim
new file mode 100644
index 00000000..29cf886e
--- /dev/null
+++ b/vim/plugin/put_date.vim
@@ -0,0 +1,11 @@
+if exists('loaded_put_date')
+  finish
+endif
+let loaded_put_date = 1
+
+" Define a :PutDate command that inserts a line into the buffer with an
+" RFC-2822 date string, using the system strftime() implementation.  Allow it
+" to accept a range which defaults to the current line.
+"
+command! -range PutDate
+      \ <line1>put =strftime('%a, %d %b %Y %T %z')
diff --git a/vim/plugin/utc.vim b/vim/plugin/utc.vim
new file mode 100644
index 00000000..39eebad8
--- /dev/null
+++ b/vim/plugin/utc.vim
@@ -0,0 +1,31 @@
+if exists('loaded_utc')
+  finish
+endif
+let loaded_utc = 1
+
+" Define a :UTC command wrapper, implemented with a script-local function of
+" the same name.  Use expand('$TZ') to ensure we're getting the value of the
+" current timezone from the environment, and cache that in a local variable
+" just long enough to manipulate the environment into using UTC for a command.
+"
+" While this is a tidy way to abstract the operation for the map, I don't like
+" the function implementation much at all.  It works OK in stable versions of
+" Vim, but changing an environment variable just long enough to affect the
+" outcome of a command as a side effect seems a bit gross.
+"
+" Worse, the whole thing presently seems to be broken in v8.1.1487; the
+" timezone first chosen seems to 'stick' permanently, and the mapping each
+" produce timestamps in that zone.  I haven't worked out why this happens yet.
+" Using the new getenv() and setenv() functions does not seem to fix it.  It
+" works fine in Debian GNU/Linux's packaged v8.0.x.
+
+function! s:UTC(command) abort
+  let tz = expand('$TZ')
+  let $TZ = 'UTC' | execute a:command | let $TZ = tz
+endfunction
+
+" The :UTC command itself completes another command name, and accepts one
+" required argument, which it passes in quoted form to the helper function.
+"
+command! -complete=command -nargs=1 UTC
+      \ call s:UTC(<q-args>)
-- 
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