git-save: improve commit authorship data

We used to always just commit as "subsurface@hohndel.org" because
libgit-19 doesn't have the interfaces to do user name lookup.  This does
better if you have libgit-20, using "git_signature_default()" to get the
actual user that does the saving.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/dive.h b/dive.h
index 89497b75a..62d57d6cc 100644
--- a/dive.h
+++ b/dive.h
@@ -714,6 +714,12 @@ extern const char *saved_git_id;
 extern void clear_git_id(void);
 extern void set_git_id(const struct git_oid *);
 
+struct user_info {
+	const char *name;
+	const char *email;
+};
+
+extern void subsurface_user_info(struct user_info *);
 extern int subsurface_rename(const char *path, const char *newpath);
 extern int subsurface_open(const char *path, int oflags, mode_t mode);
 extern FILE *subsurface_fopen(const char *path, const char *mode);