120 lines
4.4 KiB
Markdown
120 lines
4.4 KiB
Markdown
# README
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Backend for upda - **Up**date **Da**shboard in Go.
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The main git repository is hosted at
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_[https://git.myservermanager.com/varakh/upda](https://git.myservermanager.com/varakh/upda)_.
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Other repositories are mirrors and pull requests, issues, and planning are managed there.
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Contributions are very welcome!
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[Official documentation](https://git.myservermanager.com/varakh/upda-docs) is hosted in a separate git repository.
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## Development & contribution
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* Ensure to set the following environment variables for proper debug logs during development
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```shell
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DEVELOPMENT=true
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LOGGING_ENCODING=console
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LOGGING_LEVEL=debug
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```
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* Code guidelines
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* Each entity has its own repository
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* Each entity is only used in repository and service (otherwise, mapping happens)
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* Presenter layer is constructed from the entity, e.g., in REST responses and mapped
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* No entity is directly returned in any REST response
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* All log calls should be handled by `zap.L()`
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* Configuration is bootstrapped via separated `struct` types which are given to the service which need them
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* Error handling
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* Always throw an error with `NewServiceError`
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* Always wrap the cause error with `fmt.Errorf`
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* Forward/bubble up the error directly, when original error is already a `NewServiceError` (most likely internal
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calls)
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* Always abort handler chain with `AbortWithError`
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* Utils can throw any error
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Please look into the `_doc/` folder for [OpenAPI specification](./_doc/api.yaml) and a Postman Collection.
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### Lock service
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The `lockService` can be used to lock resources. This works in-memory and also in a distributed fashion with REDIS.
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Ensure to provide proper locking options when using, although in-memory ignores those.
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Example:
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```shell
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# invoked from an endpoint
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context := c.Request.Context()
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var err error
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var lock appLock
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if lock, err = h.lockService.lockWithOptions(context, "TEST-LOCK", withAppLockOptionExpiry(5*time.Minute), withAppLockOptionInfiniteRetries(), withAppLockOptionRetryDelay(5*time.Second)); err != nil {
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_ = c.AbortWithError(errToHttpStatus(err), err)
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return
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}
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# defer to avoid leakage
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defer func(lock appLock) {
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_ = lock.unlock(context)
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}(lock)
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# simulate long running task
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time.Sleep(20 * time.Second)
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```
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### Getting started
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1. Run `make clean dependencies` to fetch dependencies
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2. Start `git.myservermanager.com/varakh/upda/cmd/server` (or `cli`) as Go application and ensure to have _required_
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environment variables set
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If you like to test with PSQL and/or REDIS for task locking, here are some useful docker commands to have containers
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up and running quickly. Set necessary environment variables properly.
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```shell
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# postgres
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docker run --rm --name=upda-db \
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-p 5432:5432 \
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--restart=unless-stopped \
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-e POSTGRES_USER=upda \
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-e POSTGRES_PASSWORD=upda \
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-e POSTGRES_DB=upda \
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postgres:16-alpine
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# redis
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docker run --rm --name some-redis \
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-p 6379:6379 \
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redis redis-server --save 60 1 --loglevel warning
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```
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#### Windows hints
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On Windows, you need a valid `gcc`, e.g., https://jmeubank.github.io/tdm-gcc/download/ and add the `\bin` folder to your
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path.
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For any `go` command you run, ensure that your `PATH` has the `gcc` binary and that you add `CGO_ENABLED=1` as
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environment.
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### Release
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Releases are handled by the SCM platform and pipeline. Creating a **new git tag**, creates a new release in the SCM
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platform, uploads produced artifacts to that release and publishes docker images automatically.
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**Before** doing so, please ensure that the **commit on `master`** has the **correct version settings** and has been
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built successfully:
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* Adapt `constants_app.go` and change `Version` to the correct version number
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* Adapt `CHANGELOG.md` to reflect changes and ensure a date is properly set in the header, also add a reference link
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in footer (link to scm git tag source)
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* Adapt `api.yaml`: `version` attribute must reflect the to be released version
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* Adapt `env: VERSION_*` in `.forgejo/workflows/release.yaml`
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After the release has been created, ensure to change the following settings for the _next development cycle_:
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* Adapt `constants_app.go` and change `Version` to the _next_ version number
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* Adapt `CHANGELOG.md` and add an _UNRELEASED_ section
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* Adapt `api.yaml`: `version` attribute must reflect the _next_ version number
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* Adapt `env: VERSION_*` in `.forgejo/workflows/release.yaml` to _next_ version number
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