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This looks really promising, I am traveling ATM but will look closer at this mid next week. |
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Thanks, Jocke |
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Jocke |
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-------- Originalmeddelande -------- |
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Från: Zac Medico <zmedico@g.o> |
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Datum: |
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Till: gentoo-dev@l.g.o |
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Rubrik: Re: [gentoo-dev] Managing etc/* in an embbeded system |
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On 07/23/2015 12:46 AM, Joakim Tjernlund wrote: |
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> On Wed, 2015-07-22 at 19:47 -0400, Ian Stakenvicius wrote: |
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>> |
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>> Sent from an iPhone, sorry for the HTML... |
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>> |
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>>> On Jul 22, 2015, at 5:38 PM, Rich Freeman <rich0@g.o> wrote: |
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>>> |
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>>> On Wed, Jul 22, 2015 at 8:05 AM, Joakim Tjernlund |
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>>> <joakim.tjernlund@×××××××××.se> wrote: |
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>>>> |
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>>>> There can not be any manual merges after an SW update here. |
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>>>> |
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>>>> I started to look at INSTALL_MASK, what if I set INSTALL_MASK |
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>>>> to point to all conf files I want to manage myself. |
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>>>> Then /etc/inittab etc. will not be touched when updating init |
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>>> |
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>>> This sounds like overkill. |
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>>> |
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>>> If you've already installed a custom /etc/inittab, then when you |
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>>> emerge init, it won't overwrite your inittab even if you don't change |
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>>> anything in your portage config. emerge won't touch any files in /etc |
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>>> unless they don't already exist. |
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>> |
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>> |
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>> ..AND have been modified. IIRC if the hash of the config files match what they were when the package was |
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>> previously emerged, then the files are updated aren't they? |
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>> |
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>> I expect that this is fine in the situation described, but it's worth knowing that a config file left |
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>> unmodified may be replaced with a different vanilla config file later on. |
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> |
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> Sure, but what if I need to change a conf file in an installed system? Or rebuild a a system from scratch? |
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> The user only runs a one SW update command to update an installed system in the field and cannot edit a bunch |
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> of files too. Especially when there are hundreds of systems sitting in remote locations. |
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If you use the profile-bashrcs profile-formats setting [1], then your |
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profiles can use package.bashrc to define post_src_install and/or |
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INSTALL_MASK to remove unwanted config files from upstream packages. |
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Then you can easily replace the upstream config files with config files |
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installed by your own configurations installed by your own ebuilds. |
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|
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> This is why I need a way change conf files automatically and I want to use ebuilds/profile as |
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> far as possible. I think there is room for some improvement here in portage to allow this kind |
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> of customization. |
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|
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A template engine such as jinja [2] can be use to automate rendering of |
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your config files with settings that are specific to a particular system. |
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[1] |
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https://gitweb.gentoo.org/proj/portage.git/commit/?id=803dafc462027d6015721f40513abb5f57dc1178 |
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[2] http://jinja.pocoo.org/ |
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-- |
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Thanks, |
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Zac |
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