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xds-exec: wrapper on exec for XDS

xds-exec is a wrapper on exec linux command for X(cross) Development System.

As well as xds-exec is a wrapper on exec command and can be use to execute any command on a remote xds-server.

This tool can be used in lieu of “standard” exec command to execute any command on a remote xds-server. For example you can trig your project build by executing : xds-exec --config conf.env -- make build

Configuration

xds-exec configuration is defined either by environment variables or by setting command line options (see listed below).

Configuration through environment variables may also be defined in a file that will be sourced on xds-exec start-up. Use --config|-c option or set XDS_CONFIG environment variable to specify the config filename.

So configuration is driven either by environment variables or by command line options or using a config file knowing that the following priority order is used:

  1. use option value (for example use project ID set by --id option),
  2. else use variable XDS_xxx (for example XDS_PROJECT_ID variable) when a config file is specified with --config|-c option,
  3. else use XDS_xxx (for example XDS_PROJECT_ID) environment variable

Note: all parameters after a double dash (–) are considered as the command to execute on xds-server.

Configuration Options/Variables

--id option or XDS_PROJECT_ID env variable (mandatory)

Project ID you want to build

--config|-c option or XDS_CONFIG env variable

Env config file to source on startup

--log|-l option or XDS_LOGLEVEL env variable

Logging level, supported levels are:

  • panic,
  • fatal,
  • error,
  • warn,
  • info,
  • debug

Default level is “error”.

--rpath option or XDS_PATH env variable

Relative path into project

sdkid option or XDS_SDK_ID env variable (mandatory)

Cross Sdk ID to use to build project

timestamp|-ts option or XDS_TIMESTAMP env variable

Prefix output with timestamp

url option or XDS_SERVER_URL env variable

Remote XDS server url (default: “localhost:8000”)

How to build

Prerequisites

You must install and setup Go version 1.7 or higher to compile this tool.

Building

Clone this repo into your $GOPATH/src/github.com/iotbzh and use delivered Makefile:

 export GOPATH=$(realpath ~/workspace_go)
 mkdir -p $GOPATH/src/github.com/iotbzh
 cd $GOPATH/src/github.com/iotbzh
 git clone https://github.com/iotbzh/xds-exec.git
 cd xds-exec
 make

Debug

Visual Studio Code launcher settings can be found into .vscode/launch.json.

Tricks: To debug both xds-exec (client part) and xds-server (server part), it may be useful use the same local sources. So you should replace xds-server in vendor directory by a symlink. So clone first xds-server sources next to xds-exec directory. You should have the following tree:

> tree -L 3 src
src
|-- github.com
    |-- iotbzh
       |-- xds-exec
       |-- xds-server

Then invoke vendor/debug Makefile rule to create a symlink inside vendor directory :

cd src/github.com/iotbzh/xds-exec
make vendor/debug