From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ronnie Sahlberg Subject: [PATCH 07/11] refs.c: add a transaction function to append a reflog entry Date: Wed, 4 Jun 2014 11:57:48 -0700 Message-ID: <1401908272-7600-8-git-send-email-sahlberg@google.com> References: <1401908272-7600-1-git-send-email-sahlberg@google.com> Cc: Ronnie Sahlberg To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Wed Jun 04 20:58:47 2014 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WsGOa-0008BH-06 for gcvg-git-2@plane.gmane.org; Wed, 04 Jun 2014 20:58:44 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751890AbaFDS63 (ORCPT ); Wed, 4 Jun 2014 14:58:29 -0400 Received: from mail-oa0-f73.google.com ([209.85.219.73]:55446 "EHLO mail-oa0-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751787AbaFDS6H (ORCPT ); Wed, 4 Jun 2014 14:58:07 -0400 Received: by mail-oa0-f73.google.com with SMTP id g18so1816098oah.0 for ; Wed, 04 Jun 2014 11:58:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qRSOnAWGvZ/8YOwl+CqYxkcE4/DUtzwtxZRFLEws5Ng=; b=K5CsMCCov83MOEdyWNNtIc1FfhNTMMMwLHspAlhKRpCWb1W7t3oYTxtK5/gSJd4Om5 gtaNX5MgSaw68T5UtkuMgcmy0qF2ofrjHOm6HVih0yqSu9i9rT7taxWx88Y4GJ2iIS07 ARrIRQjU+Ttad2faWRtAXMGLSThTV6BuBSTsF0N7NBYlHzD90SS18DCArX9vKXvgXJAf 8RiQC1Z6U6VE0g/PCnT6SHLIlI6YPCP8rHCfIDxFS9ohZFmhAoa72rHd2B7JHclGZMyO 37Hp5dDmtVTqWakLDbeL0TPdvfi9myZr9etyszEgHvmIbTrVlbkCm57Y4gRFEOkyUiMg 9xpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=qRSOnAWGvZ/8YOwl+CqYxkcE4/DUtzwtxZRFLEws5Ng=; b=S66W9rdRMmD/g63M+AehgfjWiscph9xWoEh35QTlj5TjBW3WlG1cjexTSTM92jtPuK Q+mhGS9px4ElLDoAHo0GLC0P04VOa3YeAWuL7BwSFWkgl9z5qmlHshPMl9x1WES+wT5F jUOxerYAAU/+UwDqM7IX9uiRbGcasUD3nk+YDEpP+Sn0AN7NEm1m4T/QMD3WOhSFc6XE Dq4tlXrQ9KqIlf4NcacvPVQufVlbtc5z2GA1nIIzpL5y5YF39YGOVdBA+Um/OuwUP612 6OD0j7B4HcmJOxLSjD3+RWdIe9XTABGb6whk2iJvhQRwf/TmHGtr424YuTc7WPG91a5y J51A== X-Gm-Message-State: ALoCoQnznvdbIqlYRhqu2EaF71KRnQE+AhudrR33+n+trABKxVY4BFkFRD7OJ+FfLbOQPp6KIhCb X-Received: by 10.182.227.131 with SMTP id sa3mr23503280obc.38.1401908287053; Wed, 04 Jun 2014 11:58:07 -0700 (PDT) Received: from corp2gmr1-1.hot.corp.google.com (corp2gmr1-1.hot.corp.google.com [172.24.189.92]) by gmr-mx.google.com with ESMTPS id n68si331413yhj.5.2014.06.04.11.58.07 for (version=TLSv1.1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 04 Jun 2014 11:58:07 -0700 (PDT) Received: from sahlberg1.mtv.corp.google.com (sahlberg1.mtv.corp.google.com [172.27.69.52]) by corp2gmr1-1.hot.corp.google.com (Postfix) with ESMTP id D26B731DBF7; Wed, 4 Jun 2014 11:58:06 -0700 (PDT) Received: by sahlberg1.mtv.corp.google.com (Postfix, from userid 177442) id 8B62DE0887; Wed, 4 Jun 2014 11:58:06 -0700 (PDT) X-Mailer: git-send-email 2.0.0.578.gb9e379f In-Reply-To: <1401908272-7600-1-git-send-email-sahlberg@google.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Define a new transaction update type, UPDATE_LOG, and a new function transaction_update_reflog. This function will lock the reflog and append an entry to it during transaction commit. Signed-off-by: Ronnie Sahlberg --- refs.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- refs.h | 12 ++++++++ 2 files changed, 112 insertions(+), 1 deletion(-) diff --git a/refs.c b/refs.c index e89a81c..b99fcd9 100644 --- a/refs.c +++ b/refs.c @@ -3357,6 +3357,7 @@ int for_each_reflog(each_ref_fn fn, void *cb_data) enum transaction_update_type { UPDATE_SHA1 = 0, + UPDATE_LOG = 1, }; /** @@ -3374,6 +3375,12 @@ struct ref_update { struct ref_lock *lock; int type; char *msg; + + /* used by reflog updates */ + int reflog_fd; + struct lock_file reflog_lock; + char *committer; + const char refname[FLEX_ARRAY]; }; @@ -3423,6 +3430,7 @@ void transaction_free(struct ref_transaction *transaction) for (i = 0; i < transaction->nr; i++) { free(transaction->updates[i]->msg); + free(transaction->updates[i]->committer); free(transaction->updates[i]); } free(transaction->updates); @@ -3443,6 +3451,42 @@ static struct ref_update *add_update(struct ref_transaction *transaction, return update; } +int transaction_update_reflog(struct ref_transaction *transaction, + const char *refname, + const unsigned char *new_sha1, + const unsigned char *old_sha1, + const unsigned char *email, + unsigned long timestamp, int tz, + const char *msg, int flags, + struct strbuf *err) +{ + struct ref_update *update; + + if (transaction->state != REF_TRANSACTION_OPEN) + die("BUG: update_reflog called for transaction that is not " + "open"); + + update = add_update(transaction, refname, UPDATE_LOG); + hashcpy(update->new_sha1, new_sha1); + hashcpy(update->old_sha1, old_sha1); + update->reflog_fd = -1; + if (email) { + struct strbuf buf = STRBUF_INIT; + char sign = (tz < 0) ? '-' : '+'; + int zone = (tz < 0) ? (-tz) : tz; + + strbuf_addf(&buf, "%s %lu %c%04d", email, timestamp, sign, + zone); + update->committer = xstrdup(buf.buf); + strbuf_release(&buf); + } + if (msg) + update->msg = xstrdup(msg); + update->flags = flags; + + return 0; +} + int transaction_update_sha1(struct ref_transaction *transaction, const char *refname, const unsigned char *new_sha1, @@ -3613,7 +3657,28 @@ int transaction_commit(struct ref_transaction *transaction, } } - /* Perform updates first so live commits remain referenced */ + /* Lock all reflog files */ + for (i = 0; i < n; i++) { + struct ref_update *update = updates[i]; + + if (update->update_type != UPDATE_LOG) + continue; + update->reflog_fd = hold_lock_file_for_append( + &update->reflog_lock, + git_path("logs/%s", update->refname), + 0); + if (update->reflog_fd < 0) { + const char *str = "Cannot lock reflog for '%s'. %s"; + + ret = -1; + if (err) + strbuf_addf(err, str, update->refname, + strerror(errno)); + goto cleanup; + } + } + + /* Perform ref updates first so live commits remain referenced */ for (i = 0; i < n; i++) { struct ref_update *update = updates[i]; @@ -3649,6 +3714,40 @@ int transaction_commit(struct ref_transaction *transaction, } } + /* Update all reflog files */ + for (i = 0; i < n; i++) { + struct ref_update *update = updates[i]; + + if (update->update_type != UPDATE_LOG) + continue; + if (update->reflog_fd == -1) + continue; + + if (log_ref_write_fd(update->reflog_fd, update->old_sha1, + update->new_sha1, + update->committer, update->msg)) { + error("Could write to reflog: %s. %s", + update->refname, strerror(errno)); + rollback_lock_file(&update->reflog_lock); + update->reflog_fd = -1; + } + } + + /* Commit all reflog files */ + for (i = 0; i < n; i++) { + struct ref_update *update = updates[i]; + + if (update->update_type != UPDATE_LOG) + continue; + if (update->reflog_fd == -1) + continue; + if (commit_lock_file(&update->reflog_lock)) { + error("Could not commit reflog: %s. %s", + update->refname, strerror(errno)); + update->reflog_fd = -1; + } + } + if (repack_without_refs(delnames, delnum, err)) ret = -1; for (i = 0; i < delnum; i++) diff --git a/refs.h b/refs.h index c7ba822..ae8a800 100644 --- a/refs.h +++ b/refs.h @@ -318,6 +318,18 @@ int transaction_delete_sha1(struct ref_transaction *transaction, struct strbuf *err); /* + * Append a reflog entry for refname. + */ +int transaction_update_reflog(struct ref_transaction *transaction, + const char *refname, + const unsigned char *new_sha1, + const unsigned char *old_sha1, + const unsigned char *email, + unsigned long timestamp, int tz, + const char *msg, int flags, + struct strbuf *err); + +/* * Commit all of the changes that have been queued in transaction, as * atomically as possible. Return a nonzero value if there is a * problem. -- 2.0.0.578.gb9e379f