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Update devguide for Go modules

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Felix Lange 2019-11-22 16:26:51 +01:00
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@ -4,7 +4,7 @@ sort_key: A
---
**NOTE: These instructions are for people who want to contribute Go source code changes.
If you just want to run ethereum, use the regular [Installation Instructions](../install-and-build/installing-geth).**
If you just want to run ethereum, use the regular [Installation Instructions](install-guide).**
This document is the entry point for developers of the Go implementation of Ethereum.
Developers here refer to the hands-on: who are interested in build, develop, debug, submit
@ -20,16 +20,15 @@ documentation.
If you'd like to contribute to go-ethereum, please fork, fix, commit and send a pull
request (PR) for the maintainers to review and merge into the main code base. If you wish
to submit more complex changes though, please check up with the core devs first on [our
gitter channel](https://gitter.im/ethereum/go-ethereum) to ensure those changes are in
line with the general philosophy of the project and/or get some early feedback which can
make both your efforts much lighter as well as our review and merge procedures quick and
simple.
to submit more complex changes though, please check up with the core devs in the
go-ethereum [Discord server](discord). to ensure those changes are in line with the
general philosophy of the project and/or get some early feedback. This can reduce your
effort as well as speeding up our review and merge procedures.
PRs need to be based on and opened against the `master` branch (unless by explicit
agreement, you contribute to a complex feature branch).
Your PR will be reviewed according to the [Code Review guidelines](../developers/code-review-guidelines).
Your PR will be reviewed according to the [Code Review guidelines](code-review).
We encourage a PR early approach, meaning you create the PR the earliest even without the
fix/feature. This will let core devs and other volunteers know you picked up an issue.
@ -37,34 +36,11 @@ These early PRs should indicate 'in progress' status.
## Building and Testing
We assume that you have [Go installed](https://golang.org/doc/install), and `GOPATH` is set.
We assume that you have Go installed. Please use Go version 1.13 or later. We use the gc
toolchain for development, which you can get from the [Go downloads page](go-install).
**Note**:You must have your working copy under `$GOPATH/src/github.com/ethereum/go-ethereum`.
Since Go does not use relative path for import, working in any other directory will have
no effect, since the import paths will be appended to `$GOPATH/src`, and if the lib does
not exist, the version at master HEAD will be downloaded.
Most likely you will be working from your fork of `go-ethereum`, let's say from
`github.com/yourname/go-ethereum`. Clone or move your fork into the right place:
```
git clone git@github.com:nirname/go-ethereum.git $GOPATH/src/github.com/ethereum/go-ethereum
```
### Managing Vendored Dependencies
All other dependencies are tracked in the vendor/ directory. We use
[govendor](https://github.com/kardianos/govendor) to manage them.
If you want to add a new dependency, run `govendor fetch <import-path>`, then commit the
result.
If you want to update all dependencies to their latest upstream version, run `govendor
fetch +v`.
You can also use govendor to run certain commands on all go-ethereum packages, excluding
vendored code. Example: to recreate all generated code, run `govendor generate +l`.
go-ethereum is a Go module, and uses the [Go modules system](go-modules) to manage
dependencies. Using `GOPATH` is not required to build go-ethereum.
### Building Executables
@ -82,8 +58,8 @@ go-ethereum exectuables can be built individually. To build just geth, use:
go install -v ./cmd/geth
```
If you want to compile geth for an architecture that differs from your host, please consult
our [cross compilation guide](../install-and-build/cross-compile).
If you want to compile geth for an architecture that differs from your host, please
consult our [cross compilation guide](cross-compile).
### Testing
@ -105,11 +81,10 @@ TestMethod1, then both tests will run.
Running benchmarks, eg.:
```
go test -v -cpu 4 -bench . -run BenchmarkJoin
go test -v -bench . -run BenchmarkJoin
```
For more information, see the [go test
flags](http://golang.org/cmd/go/#hdr-Description_of_testing_flags) documentation.
For more information, see the [go test flags](testflag) documentation.
### Getting Stack Traces
@ -137,3 +112,11 @@ killall -QUIT geth
```
This will dump stack traces for each instance to their respective log file.
[install-guide]: ../install-and-build/installing-geth
[code-review]: ../developers/code-review-guidelines
[cross-compile]: ../install-and-build/cross-compile
[go-modules]: https://github.com/golang/go/wiki/Modules
[discord]: https://discord.gg/nthXNEv
[go-install]: https://golang.org/doc/install
[testflag]: http://golang.org/cmd/go/#hdr-Description_of_testing_flags