[PATCH v3 4/4] filter-branch: use hash-object instead of mktag

[Ian Campbell]

This allows us to recreate even historical tags which would now be consider
invalid, such as v2.6.12-rc2..v2.6.13-rc3 in the Linux kernel source tree which
lack the `tagger` header.

    $ git rev-parse v2.6.12-rc2
    9e734775f7c22d2f89943ad6c745571f1930105f
    $ git cat-file tag v2.6.12-rc2 | git mktag
    error: char76: could not find "tagger "
    fatal: invalid tag signature file
    $ git cat-file tag v2.6.12-rc2 | git hash-object -t tag -w --stdin
    9e734775f7c22d2f89943ad6c745571f1930105f

Signed-off-by: Ian Campbell <i...@hellion.org.uk>
---
 git-filter-branch.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index 956869b8e..3365a3b86 100755
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -561,7 +561,7 @@ if [ "$filter_tag_name" ]; then
                                        }' \
                                    -e '/^-----BEGIN PGP SIGNATURE-----/q' \
                                    -e 'p' ) |
-                               git mktag) ||
+                               git hash-object -t tag -w --stdin) ||
                                die "Could not create new tag object for $ref"
                        if git cat-file tag "$ref" | \
                           sane_grep '^-----BEGIN PGP SIGNATURE-----' 
>/dev/null 2>&1
-- 
2.11.0