Junio C Hamano <[email protected]> writes:

> Jeff King <[email protected]> writes:
>
>>> So maybe we would have to put reset_ident_date() at the end of the
>>> function instead, at least after git_committer_info() is called.
>>
>> Yes, although "reset and end" still feels a bit weird to me.
>>
>> I'd almost prefer to just have long-running programs insert resets at
>> strategic points.
>
> Certainly "reset at the end" feels weird but it can be explained as
> "for a one-shot thing we use the first time of the default date and
> it gives a consistent timestamp; conceptually, things that make
> multiple commits are like doing that one-shot thing multiple times
> in a row."
>
> When viewed that way, it is not _too_ bad, I would guess.

An interdiff to what we queued previously would look like this:

 builtin/tag.c | 11 ++++++++++-
 commit.c      | 15 ++++++++++++---
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/builtin/tag.c b/builtin/tag.c
index 5dccae3..e852ded 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -225,7 +225,6 @@ static void create_tag(const unsigned char *object, const 
char *tag,
        if (type <= OBJ_NONE)
            die(_("bad object type."));
 
-       reset_ident_date();
        header_len = snprintf(header_buf, sizeof(header_buf),
                          "object %s\n"
                          "type %s\n"
@@ -287,6 +286,16 @@ static void create_tag(const unsigned char *object, const 
char *tag,
                unlink_or_warn(path);
                free(path);
        }
+
+       /*
+        * Reset the default timestamp for the next call to create tag/commit
+        * object, so that they get their own fresh timestamp.
+        *
+        * NOTE NOTE NOTE! if you are libifying this function later by
+        * turning exit/die in the above code to return an error, be
+        * sure to jump here to make this call happen.
+        */
+       reset_ident_date();
 }
 
 struct msg_arg {
diff --git a/commit.c b/commit.c
index b02f3c4..db24013 100644
--- a/commit.c
+++ b/commit.c
@@ -1543,7 +1543,6 @@ int commit_tree_extended(const char *msg, size_t msg_len,
        }
 
        /* Person/date information */
-       reset_ident_date();
        if (!author)
                author = git_author_info(IDENT_STRICT);
        strbuf_addf(&buffer, "author %s\n", author);
@@ -1564,11 +1563,21 @@ int commit_tree_extended(const char *msg, size_t 
msg_len,
        if (encoding_is_utf8 && !verify_utf8(&buffer))
                fprintf(stderr, commit_utf8_warn);
 
-       if (sign_commit && do_sign_commit(&buffer, sign_commit))
-               return -1;
+       if (sign_commit && do_sign_commit(&buffer, sign_commit)) {
+               result = -1;
+               goto out;
+       }
 
        result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
+
+out:
        strbuf_release(&buffer);
+
+       /*
+        * Reset the default timestamp for the next call to create tag/commit
+        * object, so that they get their own fresh timestamp.
+        */
+       reset_ident_date();
        return result;
 }
 
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