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Wed, 24 Aug 2022 13:27:29 -0700 (PDT) MIME-Version: 1.0 References: <20220824043145.165779-1-felipe.contreras@gmail.com> <20220824043145.165779-4-felipe.contreras@gmail.com> <7779ec6b-10d5-410a-97da-5ec545cd6e1c@www.fastmail.com> <2f703212-b093-c7ed-7295-14dd39b75c96@gmx.com> <4bd03e2b-947d-4aea-dfec-f7a2f3e99aa8@gmx.com> In-Reply-To: From: Felipe Contreras Date: Wed, 24 Aug 2022 15:27:18 -0500 Message-ID: Subject: Re: [RFC PATCH 3/3] FAQ: sync newuser-install To: Eric Cook Cc: zsh-workers@zsh.org Content-Type: text/plain; charset="UTF-8" X-Seq: 50513 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: On Wed, Aug 24, 2022 at 3:11 PM Eric Cook wrote: > > On 8/24/22 16:03, Felipe Contreras wrote: > > Starting the shell without dotfiles does not produce the behavior you > > described, this isn't the corner-case. The corner-case you described > > is more specific. > > Yes, it currently doesn't because HISTFILE isn't set by zsh by default. > a startup file has to do this, but if > > > I actually think this should be the default, no need for *everyone* to > specify this. > > the `this' here is setting HISTFILE, you will create a situation where > unintentional data loss happens if zsh sets HISTFILE by default, a user > increases SAVEHIST from the default and starts zsh without their dotfiles. > Those three conditions would cause the shell to truncate HISTFILE back to > the default value of SAVEHIST. So it's more than one condition, so it's more than just starting with NO_RCS. That's what I meant by "more specific". *If* my proposed patches are applied, SAVEHIST by default would be 1000, *and* if HISTFILE had some default--which is something my proposed patches don't do, but could be considered for zsh 6.0, *then* this could happen: 1. The user has configured SAVEHIST to something greater than 1000 2. The user starts zsh with NO_RCS (e.g. zsh -f) Yes, that is an issue, but I would guess those two conditions would only be met 0.01% of the time at best, which is why I claim this is a corner-case. Moreover, this could be easily avoided by HISTFILE not having a default if NO_RCS is set, could it not? -- Felipe Contreras