2017-05-18 20:38:28 +02:00
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# Lumi
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2016-10-09 01:01:25 +02:00
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2017-05-18 20:38:28 +02:00
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Lumi is a framework and toolset for creating reusable cloud services.
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2016-10-09 01:24:26 +02:00
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2017-05-18 20:38:28 +02:00
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If you are learning about Lumi for the first time, please see [the overview document](docs/overview.md).
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2017-01-02 00:19:22 +01:00
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2017-02-25 19:46:26 +01:00
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## Installing
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2017-05-18 20:38:28 +02:00
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To install Lumi from source, simply run:
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2017-02-25 19:46:26 +01:00
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2017-05-18 20:38:28 +02:00
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$ go get -u github.com/pulumi/lumi/cmd/lumi
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2017-02-25 19:46:26 +01:00
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A `GOPATH` must be set. A good default value is `~/go`. In fact, [this is the default in Go 1.8](
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https://github.com/golang/go/issues/17262).
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2017-05-18 20:38:28 +02:00
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This installs the `lumi` binary to `$GOPATH/bin`.
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2017-02-25 19:46:26 +01:00
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At this moment, libraries must be manually installed. See below. Eventually we will have an installer.
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2017-02-25 19:52:01 +01:00
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## Compilers
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2017-05-18 20:38:28 +02:00
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The Lumi compilers are independent from the core Lumi tools.
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2017-02-25 19:52:01 +01:00
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Please see the respective pages for details on how to install, build, and test each compiler:
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2017-05-18 20:38:28 +02:00
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* [LumiJS](cmd/lumijs/README.md)
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* [LumiPy](cmd/lumipy/README.md)
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2017-02-25 19:52:01 +01:00
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2017-02-25 19:46:26 +01:00
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## Development
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2017-05-18 20:38:28 +02:00
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This section is for Lumi developers.
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2017-02-25 19:46:26 +01:00
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### Prerequisites
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2017-02-02 20:09:33 +01:00
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2017-05-18 20:38:28 +02:00
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Lumi is written in Go and uses Glide for dependency management. They must be installed:
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2017-02-02 20:09:33 +01:00
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* [Go](https://golang.org/doc/install)
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* [Glide](https://github.com/Masterminds/glide)
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2016-11-23 21:41:30 +01:00
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2017-02-02 20:09:33 +01:00
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If you wish to use the optional `lint` make target, you'll also need to install Golint:
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2017-02-25 19:46:26 +01:00
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$ go get -u github.com/golang/lint/golint
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2017-02-02 20:09:33 +01:00
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2017-02-25 19:46:26 +01:00
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### Building and Testing
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2017-02-02 04:33:45 +01:00
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2017-05-18 20:38:28 +02:00
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To build Lumi, ensure `$GOPATH` is set, and clone into a standard Go workspace:
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2016-11-23 21:41:30 +01:00
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2017-05-18 20:38:28 +02:00
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$ git clone git@github.com:pulumi/lumi $GOPATH/src/github.com/pulumi/lumi
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2016-11-23 21:41:30 +01:00
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At this point you should be able to build and run tests from the root directory:
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2017-05-18 20:38:28 +02:00
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$ cd $GOPATH/src/github.com/pulumi/lumi
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2017-02-02 04:33:45 +01:00
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$ glide update
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2016-11-23 21:41:30 +01:00
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$ make
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2017-05-18 20:38:28 +02:00
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This installs the `lumi` binary into `$GOPATH/bin`, which may now be run provided `make` exited successfully.
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2016-11-23 21:41:30 +01:00
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2017-02-25 19:52:01 +01:00
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### Installing the Runtime Libraries
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2017-05-18 20:38:28 +02:00
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By default, Lumi looks for its runtime libraries underneath `/usr/local/lumi`. `$LUMIPATH` overrides this.
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2017-02-25 19:57:07 +01:00
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Please refer to the [libraries README](lib/README.md) for details on additional installation requirements.
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2017-02-02 20:14:10 +01:00
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2017-02-25 19:52:01 +01:00
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### Debugging
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2017-01-26 22:50:27 +01:00
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2017-05-18 20:38:28 +02:00
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The Lumi tools have extensive logging built in. In fact, we encourage liberal logging in new code, and adding new
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logging when debugging problems. This helps to ensure future debugging endeavors benefit from your sleuthing.
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2017-03-13 18:51:21 +01:00
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All logging is done using Google's [Glog library](https://github.com/golang/glog). It is relatively bare-bones, and
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adds basic leveled logging, stack dumping, and other capabilities beyond what Go's built-in logging routines offer.
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2017-05-18 20:38:28 +02:00
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The Lumi command line has two flags that control this logging and that can come in handy when debugging problems. The
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2017-01-26 22:50:27 +01:00
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`--logtostderr` flag spews directly to stderr, rather than the default of logging to files in your temp directory. And
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the `--verbose=n` flag (`-v=n` for short) sets the logging level to `n`. Anything greater than 3 is reserved for
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debug-level logging, greater than 5 is going to be quite verbose, and anything beyond 7 is extremely noisy.
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For example, the command
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$ lumi eval --logtostderr -v=5
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is a pretty standard starting point during debugging that will show a fairly comprehensive trace log of a compilation.
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