From patchwork Thu Aug 15 13:14:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: avih X-Patchwork-Id: 13764790 Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A425419EED2 for ; Thu, 15 Aug 2024 13:14:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723727663; cv=none; b=sENrhGO/kFPX3MIbklxMCwLRNrfzCMMBYk5RwBugs46RM/rXYq2zrw1wn622g36mQnAFxyIWekK9oC414SIRTd+cs6Cd41DGONL2ox7e+3af8gpSlkAza+Rq/2SA7yL+O5tAdg/ppbzp7AUuxLekhYf6QItUazqCgDTcAKZk1qY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723727663; c=relaxed/simple; bh=6w00k9+c3G9p0OFCKpTfLoJYrHe7xtK6Q68P4pNSGFM=; h=Message-Id:In-Reply-To:References:From:Date:Subject:Content-Type: MIME-Version:To:Cc; b=hsOywskMWzv8ADp3d+9OCEkjnO7W11zqcPpszpuBMqm60LMJX9O0YYnOKjvFiIHN06Zw3QeozHZYmLIEBY6p1pkoq7JjiKRi7joFltPMBkptg8Du0CKvrLHZ4tQocw1/ZBbvgUPn8/y2t5L8531+cM0YoMKeF0vpN2nkiUE+dD8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mkAWhc9s; arc=none smtp.client-ip=209.85.221.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mkAWhc9s" Received: by mail-wr1-f49.google.com with SMTP id ffacd0b85a97d-369f68f63b1so529482f8f.2 for ; Thu, 15 Aug 2024 06:14:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1723727659; x=1724332459; darn=vger.kernel.org; h=cc:to:mime-version:content-transfer-encoding:fcc:subject:date:from :references:in-reply-to:message-id:from:to:cc:subject:date :message-id:reply-to; bh=mRA+5SmsjtaOpQD+SKfEoxPR3u9Wix32fAl2ggOOZmo=; b=mkAWhc9sGiyg6/c6J71R5QIYSbzjMdp5wsFQ5G7XlKQH7ADHDH5cJKGAAHfyTMt9o+ YyPuuBzMwnkoLfUQ70S02yWDdYjnWeY5ZdVwpf+OAlzISkp6RqG2g9D0j0mqTyFAIM46 IWova5W6xK7NWP9cCh9i8iths1sdRAO/9qgQJV0h7nuh3CG7gy4InjaZbfoiyLMcOM86 jR7ELwpSbFHNEqmUEflw1y4IfyJj4K03WqXZ8NdnVJb4v5Dwx7shRSDCXkImTNOFWRX+ DAo4K0BYQAPFO7LkRdgKwOCY7HRrfd+ijmSDo6bKsEtHTw1FN+VeGQYhPFAyfYa4o5fj XEcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723727659; x=1724332459; h=cc:to:mime-version:content-transfer-encoding:fcc:subject:date:from :references:in-reply-to:message-id:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=mRA+5SmsjtaOpQD+SKfEoxPR3u9Wix32fAl2ggOOZmo=; b=WfgoBvh9Kiy3dN+S3E9O6TohGQsSd3/UoTUCD8ZBBGHidxMy7klUKMhAAEpRD1w5fu 5Z7Ti/0S1EhepMVM7R8VwuC0gEYoVufpXxBEOFnZWILhgXkQ+8TDAVOxXedMaWGLpzRV CMZKOloO8uIqY35kRlrsvpPeJZWRODW0fgq/XPj6hxwtHmjjm0AbayYMjZNKW9C6u9Bl 2/Pl4mtQn/scNVK9+cYGuOpFWeLODK290SxpyDL3HC5cYoUYZO1P1ojAeMud5eGKn0ZA i+fy+Zng1pX9b3BPpH21hvKz2sXlvBlat829wmdsO0OQ8IZ4uao3ORxcUDzp2fUfvp3S tfSQ== X-Gm-Message-State: AOJu0YzhWBWjxSDNoovJnvblSbuKZhyZ15hoAsSo3dWcZMMKjkkS2s68 0YLxSA+Xjk9TBrf0bd7zjRahXQIQ0Bcvmr+VZpq4vLL6sFCmP9/Sw1tacw== X-Google-Smtp-Source: AGHT+IFVPmBcSXBMppT2CSsIuTEZxVReGjLIH6TrZIpiwrUymnfj84s7NsRp5d+65h57zyay3Vzhkw== X-Received: by 2002:adf:c784:0:b0:364:6c08:b9b2 with SMTP id ffacd0b85a97d-371778091a3mr4551688f8f.45.1723727659238; Thu, 15 Aug 2024 06:14:19 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-429ded29fcfsm49424485e9.20.2024.08.15.06.14.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Aug 2024 06:14:18 -0700 (PDT) Message-Id: <4f77b7eb7f1110e47201b8c97c34a0cbcd14e24f.1723727653.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Thu, 15 Aug 2024 13:14:10 +0000 Subject: [PATCH v2 5/8] git-prompt: add some missing quotes Fcc: Sent Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To: git@vger.kernel.org Cc: "brian m. carlson" , Avi Halachmi , "Avi Halachmi (:avih)" From: "Avi Halachmi (:avih)" From: "Avi Halachmi (:avih)" The issues which this commit fixes are unlikely to be broken in real life, but the fixes improve correctness, and would prevent bugs in some uncommon cases, such as weird IFS values. Listing some portability guideline here for future reference. I'm leaving it to someone else to decide whether to include it in the file itself, place is as a new file, or not. --------- The command "local" is non standard, but is allowed in this file: - Quote initialization if it can expand (local x="$y"). See below. - Don't assume initial value after "local x". Either initialize it (local x=..), or set before first use (local x;.. x=..; ). (between shells, "local x" can unset x, or inherit it, or do x= ) Other non-standard features beyond "local" are to be avoided. Use the standard "test" - [...] instead of non-standard [[...]] . -------- Quotes (some portability things, but mainly general correctness): Quotes prevent tilde-expansion of some unquoted literal tildes (~). If the expansion is undesirable, quotes would ensure that. Tilds expanded: a=~user:~/ ; echo ~user ~/dir not expanded: t="~"; a=${t}user b=\~foo~; echo "~user" $t/dir But the main reason for quoting is to prevent IFS field splitting (which also coalesces IFS chars) and glob expansion after parameter expansion or command substitution. In _command-arguments_, expanded/substituted values must be quoted: Good: [ "$mode" = yes ]; local s="*" x="$y" e="$?" z="$(cmd ...)" Bad: [ $mode = yes ]; local s=* x=$y e=$? z=$(cmd...) Still in _agumemts_, no need to quote non-expandable values: Good: local x= y=yes; echo OK OK, but not required: local x="" y="yes"; echo "OK" But completely empty (NULL) arguments must be quoted: foo "" is not the same as: foo Assignments in simple commands - with or without an actual command, don't need quoting becase there's no IFS split or glob expansion: Good: s=* a=$b c=$(cmd...)${x# foo }${y- } [cmd ...] It's also OK to use double quotes, but not required. This behavior (no IFS/glob) is called "assignment context", and "local" does not behave with assignment context in some shells, hence we require quotes when using "local" - for compatibility. First value in 'case...' doesn't IFS-split/glob, doesn't need quotes: Good: case * $foo $(cmd...) in ... ; esac identical: case "* $foo $(cmd...)" in ... ; esac Nested quotes in command substitution are fine, often necessary: Good: echo "$(foo... "$x" "$(bar ...)")" Nested quotes in substring ops are legal, and sometimes needed to prevent interpretation as a pattern, but not the most readable: Legal: foo "${x#*"$y" }" Nested quotes in "maybe other value" subst are invalid, unnecessary: Good: local x="${y- }"; foo "${z:+ $a }" Bad: local x="${y-" "}"; foo "${z:+" $a "}" Outer/inner quotes in "maybe other value" have different use cases: "${x-$y}" always one quoted arg: "$x" if x is set, else "$y". ${x+"$x"} one quoted arg "$x" if x is set, else no arg at all. Unquoted $x is similar to the second case, but it would get split into few arguments if it includes any of the IFS chars. Assignments don't need the outer quotes, and the braces delimit the value, so nested quotes can be avoided, for readability: a=$(foo "$x") a=${x#*"$y" } c=${y- }; bar "$a" "$b" "$c" Signed-off-by: Avi Halachmi (:avih) --- contrib/completion/git-prompt.sh | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh index 4781261f868..5d7f236fe48 100644 --- a/contrib/completion/git-prompt.sh +++ b/contrib/completion/git-prompt.sh @@ -246,7 +246,7 @@ __git_ps1_show_upstream () if [ -n "$count" ] && [ -n "$name" ]; then __git_ps1_upstream_name=$(git rev-parse \ --abbrev-ref "$upstream_type" 2>/dev/null) - if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then + if [ "$pcmode" = yes ] && [ "$ps1_expanded" = yes ]; then upstream="$upstream \${__git_ps1_upstream_name}" else upstream="$upstream ${__git_ps1_upstream_name}" @@ -278,12 +278,12 @@ __git_ps1_colorize_gitstring () local c_lblue=$'\001\e[1;34m\002' local c_clear=$'\001\e[0m\002' fi - local bad_color=$c_red - local ok_color=$c_green + local bad_color="$c_red" + local ok_color="$c_green" local flags_color="$c_lblue" local branch_color="" - if [ $detached = no ]; then + if [ "$detached" = no ]; then branch_color="$ok_color" else branch_color="$bad_color" @@ -360,7 +360,7 @@ __git_sequencer_status () __git_ps1 () { # preserve exit status - local exit=$? + local exit="$?" local pcmode=no local detached=no local ps1pc_start='\u@\h:\w ' @@ -379,7 +379,7 @@ __git_ps1 () ;; 0|1) printf_format="${1:-$printf_format}" ;; - *) return $exit + *) return "$exit" ;; esac @@ -427,7 +427,7 @@ __git_ps1 () rev_parse_exit_code="$?" if [ -z "$repo_info" ]; then - return $exit + return "$exit" fi local short_sha="" @@ -449,7 +449,7 @@ __git_ps1 () [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] && git check-ignore -q . then - return $exit + return "$exit" fi local sparse="" @@ -499,7 +499,7 @@ __git_ps1 () case "$ref_format" in files) if ! __git_eread "$g/HEAD" head; then - return $exit + return "$exit" fi case $head in @@ -597,10 +597,10 @@ __git_ps1 () fi fi - local z="${GIT_PS1_STATESEPARATOR-" "}" + local z="${GIT_PS1_STATESEPARATOR- }" b=${b##refs/heads/} - if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then + if [ "$pcmode" = yes ] && [ "$ps1_expanded" = yes ]; then __git_ps1_branch_name=$b b="\${__git_ps1_branch_name}" fi @@ -612,7 +612,7 @@ __git_ps1 () local f="$h$w$i$s$u$p" local gitstring="$c$b${f:+$z$f}${sparse}$r${upstream}${conflict}" - if [ $pcmode = yes ]; then + if [ "$pcmode" = yes ]; then if [ "${__git_printf_supports_v-}" != yes ]; then gitstring=$(printf -- "$printf_format" "$gitstring") else @@ -623,5 +623,5 @@ __git_ps1 () printf -- "$printf_format" "$gitstring" fi - return $exit + return "$exit" }