sample tutorial cli

The Span CLI

The Span CLI is a command line alternative to the Span dashboard. All of the source code is available on GitHub: https://github.com/lab5e/spancli

Installing

If you have Go installed you can install this utility by issuing the following command.

    go get github.com/lab5e/spancli/cmd/span@latest

Alternatively you can download one of the prebuilt binaries from the releases page

Note that the executables are not signed.

Usage

The general usage of span is

span [options] <subcommand> [subcommand options]

For more help please refer to the -h option:

span -h
span <subcommand> -h

Environment variables

In order to make life a bit easier, two of the required command line options can be set from the environment. Also, it is a good idea to not use the --token option if you can avoid it since this makes your token end up in your command line history.

--token option can be set in SPAN_API_TOKEN
--collection-id option can be set in SPAN_COLLECTION_ID

If you have these environment variables set you can omit their respective options. If you do specify the command line options they will override what is set in the environment.

TAB Completion

In order to get tab completion you can add this to your .bash_profile or wherever you put your completion settings.

_completion_span() {
    # All arguments except the first one
    args=("${COMP_WORDS[@]:1:$COMP_CWORD}")

    # Only split on newlines
    local IFS=$'\n'

    # Call completion (note that the first element of COMP_WORDS is
    # the executable itself)
    COMPREPLY=($(GO_FLAGS_COMPLETION=1 ${COMP_WORDS[0]} "${args[@]}"))
    return 0
}

complete -F _completion_span span