[PATCH] tg-push: Filter out plain SHA1s from being pushed.

[Thomas Schwinge <thomas@schwinge.name>]

Otherwise, problems arise when branches depend (via .topdeps) on SHA1s:

    $ tg push -r tmp t/____longjmp_chk_cleanup_linux_x86_64
    fatal: 77c84aeb81808c3109665949448dba59965c391e cannot be resolved to branch.
    fatal: The remote end hung up unexpectedly
---

Hello!

I was facing the following problem:

    thomas@dirichlet:~/tmp/source/glibc/git/glibc.hurd $ bash -v -x /usr/bin/tg push -r tmp t/____longjmp_chk_cleanup_linux_x86_64
    [...]
    ++ read _dep
    ++ missing_deps=
    ++ rm /tmp/tg-depsfile.nCfywI
    ++ return 0
    ++ xargs git push tmp
    ++ sort -u /tmp/tg-push-listfile.sZeHIr
    fatal: 77c84aeb81808c3109665949448dba59965c391e cannot be resolved to branch.
    fatal: The remote end hung up unexpectedly
    rm -f "/tmp/tg-push-listfile.sZeHIr"
    + rm -f /tmp/tg-push-listfile.sZeHIr

That's the actual problem:

    thomas@dirichlet:~/tmp/source/glibc/git/glibc.hurd $ git push tmp 77c84aeb81808c3109665949448dba59965c391e
    fatal: 77c84aeb81808c3109665949448dba59965c391e cannot be resolved to branch.
    fatal: The remote end hung up unexpectedly

... which is due to:

    $ git show t/____longjmp_chk_cleanup_linux_x86_64:.topdeps
    77c84aeb81808c3109665949448dba59965c391e

All other parts (at least those I tested / got to use so far) work just
fine when passing SHA1s.

Here is a patch to make this work for tg push, too.

    thomas@dirichlet:~/tmp/source/glibc/git/glibc.hurd $ tg push -r tmp t/____longjmp_chk_cleanup_linux_x86_64
    Counting objects: 196207, done.
    Compressing objects: 100% (32953/32953), done.
    Writing objects: 100% (196207/196207), 66.45 MiB | 4047 KiB/s, done.
    Total 196207 (delta 163379), reused 191592 (delta 159243)
    To /media/Stalin/tmp/glibc
     * [new branch]      t/____longjmp_chk_cleanup_linux_x86_64 -> t/____longjmp_chk_cleanup_linux_x86_64
     * [new branch]      refs/top-bases/t/____longjmp_chk_cleanup_linux_x86_64 -> refs/top-bases/t/____longjmp_chk_cleanup_linux_x86_64


 tg-push.sh |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/tg-push.sh b/tg-push.sh
index cd208a0..28cad81 100644
--- a/tg-push.sh
+++ b/tg-push.sh
@@ -71,6 +71,9 @@ for name in $branches; do
 	$recurse_deps && [ -n "$_dep_is_tgish" ] &&
 		no_remotes=1 recurse_deps push_branch "$name"
 
+	# filter out plain SHA1s
 	# remove multiple occurrences of the same branch
-	sort -u "$_listfile" | xargs git push $dry_run "$remote"
+	grep -vE '^[0-9a-f]{40}$' < "$_listfile" \
+		| sort -u \
+			| xargs git push $dry_run "$remote"
 done
-- 
1.6.0.4