From patchwork Mon Apr 19 11:37:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?SZEDER_G=C3=A1bor?= X-Patchwork-Id: 12211639 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DD02C433ED for ; Mon, 19 Apr 2021 11:41:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25A6961166 for ; Mon, 19 Apr 2021 11:41:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238769AbhDSLlm (ORCPT ); Mon, 19 Apr 2021 07:41:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238759AbhDSLiw (ORCPT ); Mon, 19 Apr 2021 07:38:52 -0400 Received: from mail-wr1-x42d.google.com (mail-wr1-x42d.google.com [IPv6:2a00:1450:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D050BC061350 for ; Mon, 19 Apr 2021 04:38:16 -0700 (PDT) Received: by mail-wr1-x42d.google.com with SMTP id p6so26945384wrn.9 for ; Mon, 19 Apr 2021 04:38:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:mime-version :content-transfer-encoding:fcc:to:cc; bh=Dz1zr8n39D/q2P9IL0Jw3lNhMszXFSjhNCDEQ18nlzQ=; b=qO/+hu6wCbq6UapB8FBg/pZyjnkBfZsdPbJyEqMgKha3Ejf1z8DqmiIJaD5nfY5bKY iDiHRKRbfSYdCxA4ol85avbJ4yrOkSVGCOklBoxeZ/GQBuV3gtOw5O6E0rErnwqUy+Xu J/g809RbRRsh2BdFyo06wwISmJBn5RRhtv+v6GDjg1mXrofYApC1hUk09cN0s0AJGv3o 4ZdimIQweM6MGSaVtbyZ+XOjlhnkBzsOrInCDVUFyCRw43SoLA3qhKcbkaRs9fdhza++ 0fGjCJfx0CSjdO5ClC9ZieK6Z4Yvbzhq/ACKz5TxzhgEb/OhuLwdOQA6fMFjEVsf3L67 l23g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:mime-version:content-transfer-encoding:fcc:to:cc; bh=Dz1zr8n39D/q2P9IL0Jw3lNhMszXFSjhNCDEQ18nlzQ=; b=boIko6M8nQubCtk+OkM5bmIt4lk/ffpprMlvhB4hRxQjB+W+Ga0Rxc0cKK5SfBSrQd 8ECsbz6RfNA0TrSGMJkytI2be/FGv1qBe3pqHNjegj6PICXUUhxwR/1zAXphXTrqFs3D FH3WDQ7nu54cOf//3kHNgRDT04IhBCWlU1RGGy1YXp3uWLFcWJmGusOC3a6JzFKWG6VU M+VPYtBREhXO8ukdDsnDvviqqoQCuO1xUxr1rVXJaB5DLSREfPDPcUY48S8JyyG8dPka 8y3nEl3UiA8Ji8J/ycLJIZLrveHewEpvFJ04m0fFBHBbINhFXHikIhjeFNff7scwmf/X pkMg== X-Gm-Message-State: AOAM5320AJDW0smRX8FXXh9AwpC3ZbfEU+eGjQ34t79OlkiB79iWsIC/ WFf6pxnAe+ggEbLW3m5WunFGvdlxIS4= X-Google-Smtp-Source: ABdhPJylJV4vTZkDRWLlAJ2rBF2OLHhrspSLHycXEORmYeNY9llc2Gkb9H7VMoke6HOdOB8pAyYLmA== X-Received: by 2002:a5d:4cc1:: with SMTP id c1mr14141910wrt.291.1618832295678; Mon, 19 Apr 2021 04:38:15 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id k22sm21987502wrh.5.2021.04.19.04.38.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Apr 2021 04:38:15 -0700 (PDT) Message-Id: <742d716e451061540ec3a1df53e0c9dbb08d9124.1618832277.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Mon, 19 Apr 2021 11:37:52 +0000 Subject: [PATCH v7 24/28] git-prompt: prepare for reftable refs backend MIME-Version: 1.0 Fcc: Sent To: git@vger.kernel.org Cc: Han-Wen Nienhuys , Jeff King , Ramsay Jones , Jonathan Nieder , Johannes Schindelin , Jonathan Tan , Josh Steadmon , Emily Shaffer , Patrick Steinhardt , =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsA==?= Bjarmason , Felipe Contreras , Derrick Stolee , =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsA==?= Bjarmason , Han-Wen Nienhuys g , Han-Wen Nienhuys , =?utf-8?q?SZEDER_G=C3=A1bor?= Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: =?utf-8?q?SZEDER_G=C3=A1bor?= From: =?UTF-8?q?SZEDER=20G=C3=A1bor?= In our git-prompt script we strive to use Bash builtins wherever possible, because fork()-ing subshells for command substitutions and fork()+exec()-ing Git commands are expensive on some platforms. We even read and parse '.git/HEAD' using Bash builtins to get the name of the current branch [1]. However, the upcoming reftable refs backend won't use '.git/HEAD' at all, but will write an invalid refname as placeholder for backwards compatibility instead, which will break our git-prompt script. Update the git-prompt script to recognize the placeholder '.git/HEAD' written by the reftable backend (its content is specified in the reftable specs), and then fall back to use 'git symbolic-ref' to get the name of the current branch. [1] 3a43c4b5bd (bash prompt: use bash builtins to find out current branch, 2011-03-31) Signed-off-by: SZEDER Gábor --- contrib/completion/git-prompt.sh | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh index 4640a1535d15..2e5a5d80271d 100644 --- a/contrib/completion/git-prompt.sh +++ b/contrib/completion/git-prompt.sh @@ -478,10 +478,15 @@ __git_ps1 () if ! __git_eread "$g/HEAD" head; then return $exit fi - # is it a symbolic ref? b="${head#ref: }" if [ "$head" = "$b" ]; then detached=yes + elif [ "$b" = "refs/heads/.invalid" ]; then + # Reftable + b="$(git symbolic-ref HEAD 2>/dev/null)" || + detached=yes + fi + if [ "$detached" = yes ]; then b="$( case "${GIT_PS1_DESCRIBE_STYLE-}" in (contains)