Make CustomPath, CustomConf and AppWorkPath configurable at build

[zeripath]

The requirement to set environment variables can make it difficult to run gitea in non-development environments.

Using an LDFLAGS with our Makefile or by directly passing in -X variables to go build it should be possible to change the default locations thus making the environment variables unnecessary.

An example of this would be to say set -X "code.gitea.io/gitea/modules/setting.CustomPath=/data/gitea" for the docker, along with appropriate settings for CustomConf and AppWorkPath to remove the necessity to wrap the gitea binary in a shell script.

This would help our downstream packagers as they could make Gitea comply with the FHS and the equivalent debian hierarchy.

Signed-off-by: Andrew Thornton art27@cantab.net

Edit: It requires the full "code.gitea.io/gitea/modules/setting" import path.

[zeripath]

I've set backport 1.8 as I think this is a relatively minor change that could help users.

I'd change the docker build infrastructure to show how easy this makes things but I'm not certain where it is being built.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@ccf4783). Click here to learn what that means.
The diff coverage is 31.57%.

@@            Coverage Diff            @@
##             master    #6631   +/-   ##
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  Coverage          ?   41.22%           
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  Files             ?      421           
  Lines             ?    58064           
  Branches          ?        0           
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  Hits              ?    23934           
  Misses            ?    30961           
  Partials          ?     3169

Impacted Files	Coverage Δ
modules/setting/setting.go	47.48% <31.57%> (ø)

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[mckaygerhard]

from now on it would be a good idea for each change, also document that change in the docs directory ... why is this change not documented in the docs directory installation files? @zeripath ? i mean, each coder could also write on each pul request respective documentation about their respective feature/change/bugfix if change some behaviour!

that was posted several times in forums that gitea lacks of proper documentation!

[zeripath]

@mckaygerhard are you aware of how rude that comment reads?

This PR, although it could be merged, isn't really complete as I'd like - personally I'd prefer to get the docker build to move to it - which would be a good way to test and try to come up with documentation for this.

Do you have any suggestions for how this could be documented?

[mckaygerhard]

umm ok @zeripath what I wanted to say is that "it would be good", not that you should do it right now, I mean, as I mentioned :

it would be a good idea

[zeripath]

OK, We now build a special version of gitea for the docker with its default CustomPath in /data/gitea.

I've added the --custom-path option to the cmdline program.

Running gitea help will print out your computed configuration for the several of the variables.

Documentation is complete.

[sapk]

Thanks @zeripath. The parts that I reviewed looks good now (they are removed now so perfect 😄)
The PR looks good but I haven't tested it so this comment is just to validate my previous requests.

[zeripath]

I do think it would be easier if the gitea installed on the docker was just built to work with it's paths correct for the default docker installation without environment variables or options etc. but it could be done at a later date.

[sapk]

@zeripath the current main problem with the current docker installation is that it use the same path for GITEA_CUSTOM and for app_work_dir it is confusing and should be fix but will break some installation. In general, docker container are configurate by ENV so I don't see the need to remove one set by default.
Reviewing your PR, I found that GITEA_CUSTOM is enforce at various point where it shoudln't : https://github.com/go-gitea/gitea/blob/master/docker/etc/profile.d/gitea.sh
and not forwarded at other:
https://github.com/go-gitea/gitea/blob/master/docker/etc/s6/gitea/setup#L9
This cleanup could be done in this PR but I consider that it should be tackle separatly as it is a wider problem. I will open a PR to tackle that and make the app_work_dir distinguisable.

edit: We are also using the same path for APP_DATA_PATH

[lafriks]

Should we really backport this to 1.8?

[zeripath]

When it was simply a two liner I thought so. Now it's a bit more involved I'm less definite.

In terms of why backport:

I think downstream packers might like this functionality - it does finally actually allow Gitea to be built in a way that complies with the filesystem hierarchy standard and should remove some gotchas with running the Gitea subcommands in those environments.

It's also helpful for those on the default build as you can now see where several paths are set through gitea help

I'm not stuck either way and whilst I understand the frustration of our Debian users that the Gitea binary uses nonstandard paths - I don't understand why they can't just shadow the binary with a compliant script, albeit this script would be complicated without this PR due to the difficulty of setting -c. This does however remove the necessity of even having a script.

[lafriks]

I will remove backporting label as it is more of a feature than bugfix, anyway creating correct app.ini and using -c this already can be achieved so it is not so important if it will be only from 1.9

[zeripath]

No problems