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ExHCL

Build Status Inline docs

Configuration language inspired by HCL

Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Interactive Elixir (1.1.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> content = """
...(1)> database pg1 { username = "testuser", password = "password" }
...(1)> """
"database pg1 { username = \"testuser\", password = \"password\" }\n"
iex(2)> Exhcl.Parser.parse(content)
{:ok, %{database: %{pg1: %{password: "password", username: "testuser"}}}}

An example

deamon = true

// Store data within Consul. This backend supports HA.
// It is the most recommended backend for Vault and has been shown to
// work at high scale under heavy load.
backend "consul" {
  address = "127.0.0.1:8500"
  path = "vault"
}

/* Configures how Vault is listening for API requests.
 * "tcp" is currently the only option available.
 * A full reference for the inner syntax is below. */
listener "tcp" {
  address = "127.0.0.1:8200"
  tls_disable = 1
}

# Configures the telemetry reporting system (see below).
telemetry {
  statsite_address = "127.0.0.1:8125"
  disable_hostname = true
}

It will be converted to follow Elixir representation:

%{deamon: true,
  backend: %{"consul" => %{address: "127.0.0.1:8500",
                           path: "vault"}},
  listener: %{"tcp" => %{address: "127.0.0.1:8200",
                         tls_disable: 1}},
  telemetry: %{disable_hostname: true,
               statsite_address: "127.0.0.1:8125"}}

Syntax

  • Comments: //, #, /* */
  • Bools: true, false
  • Numbers: 1, 2, 123
  • Float: 1.01, 1.02
  • Scientific notation for float numbers: 1.02e+15, 1.0e-9
  • Strings: "text"
  • Atoms: address, listener, and etc
  • Arrays: [1, 1.02, 1.02e+15, "string"]
  • Arrays of arrays: [[1], [2], [3]]
  • Maps: telemetry { enable = true }

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Configuration language inspired by HCL

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