Git storage: change time encoding in directory names

We used to use [[yyyy-]mm-]nn-ddd-hh:mm:ss[~hex] in our git storage format
for directory that contained dives. Problem with the is that on Windows
the colon ':' is an illegal character in a filename. So libgit2 refuses to
clone such a repository on Windows.

So instead we now always write dive directories in git repositories as
[[yyyy-]mm-]nn-ddd-hh=mm=ss[~hex] which replaces the ':' with an '='.

Of course we load / parse both formats so that older formats still work.
The next time they are written all the names change which causes rather
huge commits, but that's the only way I see for cloud storage to work on
Windows.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/save-git.c b/save-git.c
index 7c564e533..e13847125 100644
--- a/save-git.c
+++ b/save-git.c
@@ -549,7 +549,8 @@ static void create_dive_name(struct dive *dive, struct membuffer *name, struct t
 	if (tm.tm_mon != dirtm->tm_mon)
 		put_format(name, "%02u-", tm.tm_mon+1);
 
-	put_format(name, "%02u-%s-%02u:%02u:%02u",
+	/* a colon is an illegal char in a file name on Windows - use an '=' instead */
+	put_format(name, "%02u-%s-%02u=%02u=%02u",
 		tm.tm_mday, weekday[tm.tm_wday],
 		tm.tm_hour, tm.tm_min, tm.tm_sec);
 }