281805311c
This change looks up the main module from a package, and that module's entrypoint, when performing evaluation. In any case, the arguments are validated and bound to the resulting function's parameters.
120 lines
3.7 KiB
Go
120 lines
3.7 KiB
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
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package cmd
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import (
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"path/filepath"
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"strings"
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"github.com/spf13/cobra"
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"github.com/marapongo/mu/pkg/cmdutil"
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"github.com/marapongo/mu/pkg/compiler"
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"github.com/marapongo/mu/pkg/compiler/core"
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"github.com/marapongo/mu/pkg/graph"
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"github.com/marapongo/mu/pkg/tokens"
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"github.com/marapongo/mu/pkg/util/contract"
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)
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func newCompileCmd() *cobra.Command {
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var cmd = &cobra.Command{
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Use: "compile [blueprint] [-- [args]]",
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Short: "Compile a MuPackage into its MuGL graph representation",
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Long: "Compile a MuPackage into its MuGL graph representation.\n" +
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"\n" +
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"A graph is a topologically sorted directed-acyclic-graph (DAG), representing a\n" +
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"collection of resources that may be used in a deployment operation like plan or apply.\n" +
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"This graph is produced by evaluating the contents of a Mu blueprint package, and\n" +
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"does not actually perform any updates to the target environment.\n" +
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"\n" +
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"By default, a blueprint package is loaded from the current directory. Optionally,\n" +
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"a path to a blueprint elsewhere can be provided as the [blueprint] argument.",
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Run: func(cmd *cobra.Command, args []string) {
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// If there's a --, we need to separate out the command args from the stack args.
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flags := cmd.Flags()
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dashdash := flags.ArgsLenAtDash()
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var packArgs []string
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if dashdash != -1 {
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packArgs = args[dashdash:]
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args = args[0:dashdash]
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}
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// Create a compiler options object and map any flags and arguments to settings on it.
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opts := core.DefaultOptions()
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opts.Args = dashdashArgsToMap(packArgs)
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// In the case of an argument, load that specific package and new up a compiler based on its base path.
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// Otherwise, use the default workspace and package logic (which consults the current working directory).
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var mugl graph.Graph
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if len(args) == 0 {
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comp, err := compiler.Newwd(opts)
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if err != nil {
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contract.Failf("fatal: %v", err)
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}
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mugl = comp.Compile()
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} else {
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fn := args[0]
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pkg := cmdutil.ReadPackageFromArg(fn)
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var comp compiler.Compiler
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var err error
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if fn == "-" {
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comp, err = compiler.Newwd(opts)
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} else {
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comp, err = compiler.New(filepath.Dir(fn), opts)
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}
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if err != nil {
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contract.Failf("fatal: %v", err)
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}
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mugl = comp.CompilePackage(pkg)
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}
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if mugl == nil {
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return
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}
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// Finally, serialize that MuGL graph so that it's suitable for printing/serializing.
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// TODO: this.
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},
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}
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return cmd
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}
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// dashdashArgsToMap is a simple args parser that places incoming key/value pairs into a map. These are then used
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// during MuPackage compilation as inputs to the main entrypoint function.
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// TODO: this is fairly rudimentary; we eventually want to support arrays, maps, and complex types.
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func dashdashArgsToMap(args []string) core.Args {
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mapped := make(core.Args)
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for i := 0; i < len(args); i++ {
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arg := args[i]
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// Eat - or -- at the start.
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if arg[0] == '-' {
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arg = arg[1:]
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if arg[0] == '-' {
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arg = arg[1:]
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}
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}
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// Now find a k=v, and split the k/v part.
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if eq := strings.IndexByte(arg, '='); eq != -1 {
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// For --k=v, simply store v underneath k's entry.
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mapped[tokens.Name(arg[:eq])] = arg[eq+1:]
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} else {
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if i+1 < len(args) && args[i+1][0] != '-' {
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// If the next arg doesn't start with '-' (i.e., another flag) use its value.
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mapped[tokens.Name(arg)] = args[i+1]
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i++
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} else if arg[0:3] == "no-" {
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// For --no-k style args, strip off the no- prefix and store false underneath k.
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mapped[tokens.Name(arg[3:])] = false
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} else {
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// For all other --k args, assume this is a boolean flag, and set the value of k to true.
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mapped[tokens.Name(arg)] = true
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}
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}
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}
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return mapped
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}
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