Go composer.json unmarshalling.

main.go

package main

import  (
    "encoding/json"
    "fmt"
)

// https://github.com/composer/composer/blob/master/res/composer-schema.json
// http://getcomposer.org/doc/04-schema.md#repositories
// IGNORE THIS -- MIGHT NOT BE USED
type Repository struct {
    Type string
    Url string
    Package struct {
        Name string
        Version string
        Dist struct {
            Url string
            Type string
        }
        Source struct {
            Url string
            Type string
            Reference string
        }
    }

    Options struct {
        Ssl struct {
            VerifyPeer bool
        }
    }
}

type Config struct {
    ProcessTimeout int `json:"process-timeout"`
    UseIncludePath bool `json:"use-include-path"`
    PreferredInstall string `json:"preferred-install"`
    NotifyOnInstall bool `json:"notify-on-install"`
    GithubProtocols []string 
    GithubOauth map[string]string `json:"github-oauth"`
    GithubDomains []string `json:"github-domains"`
    VendorDir string `json:"vendor-dir"`
    BinDir string `json:"bin-dir"`
    CacheDir string `json:"cache-dir"`
    CacheFilesDir string `json:"cache-files-dir"`
    CacheRepoDir string `json:"cache-repo-dir"`
    CacheVcsDir string `json:"cache-vcs-dir"`
    CacheTtl int `json:"cache-ttl"`
    CacheFilesTtl int `json:"cache-files-ttl"`
    CacheFilesMaxsize string `json:"cache-files-maxsize"` // Could be string or int -- Default "300MiB"
    DiscardChanges bool `json:"discard-changes"` // This could be true, false or "stash"
    AutoloaderSuffix string `json:"autoloader-suffix"`
    PrependAutoloader bool `json:"prepend-autoloader"`
}

// Config Initializer
func NewConfig() *Config {
    return &Config {
        ProcessTimeout: 300,
        GithubProtocols: []string{"git", "https", "http"},
        GithubDomains: []string{"github.com"},
        VendorDir: "vendor",
        BinDir: "vendor/bin",
        CacheDir: "~/.composer/cache",
        CacheFilesMaxsize: "300MiB",
        NotifyOnInstall: true,
        PreferredInstall: "auto",
        PrependAutoloader: true,
        DiscardChanges: false,
        CacheTtl: 15552000,
        CacheFilesTtl: 15552000,
    }
}

type Author struct {
    Name string
    Email string
    Homepage string
    Role string
}

type AutoloadValue struct {
    Psr0 map[string]string `json:"psr-0"`
    Psr4 map[string]string `json:"psr-4"`
    Classmap []string
    files []string
}

type Script struct {
    PreInstallCmd []string `json:"pre-install-cmd"`
    PostInstallCmd []string `json:"post-install-cmd"`
    PreUpdateCmd []string `json:"pre-update-cmd"`
    PostUpdateCmd []string `json:"post-update-cmd"`
    PreStatusCmd []string `json:"pre-status-cmd"`
    PostStatusCmd []string `json:"post-status-cmd"`
    PrePackageInstall []string `json:"pre-package-install"`
    PostPackageInstall []string `json:"post-package-install"`
    PrePackageUpdate []string `json:"pre-package-update"`
    PostPackageUpdate []string `json:"post-package-update"`
    PrePackageUninstall []string `json:"pre-package-uninstall"`
    PostPackageUninstall []string `json:"post-package-uninstall"`
    PreAutoloadDump []string `json:"pre-autoload-dump"`
    PostAutoloadDump []string `json:"post-autoload-dump"`
    PostRootPackageInstall []string `json:"post-root-package-install"`
    PostCreateProjectCmd []string `json:"post-create-project-cmd"`
}

type Support struct {
    Email string
    Issues string
    Forum string
    Wiki string
    Irc string
    Source string
}

// Composer.json top level
type Manifest struct {
    Name string
    Type string
    Description string
    Keywords []string
    Homepage string
    Version string
    Time string
    License []string
    Authors  []Author
    Require map[string]string
    Replace map[string]string
    Conflict map[string]string
    Provide map[string]string
    RequireDev map[string]string `json:"require-dev"`
    Suggest map[string]string
    Config Config
    Extra map[string]string
    Autoload AutoloadValue
    Archive []string
    Repositories map[string]string // -- Don't know if this needs to be a map[string]string or a Repository type
    MinimumStability string `json:"minimum-stability"`
    PreferStable bool `json:"prefer-stable"`
    Bin []string
    IncludePath []string `json:"include-path"` // This is apparently deprecated 
    Scripts []Script
    Support Support
}

func NewManifest() *Manifest {
    conf := *NewConfig()
    return &Manifest {Config: conf}
}

func main() {
    // This needs more added to it
    test := `{ 
        "name": "TestPackage", 
        "type": "library", 
        "description": "The foo bar lorem ipsum sit dolor.", 
        "keywords": [ "foo", "bar", "baz" ], 
        "homepage": "http://www.example.com", 
        "version": "1.1.1", 
        "time": "2013/01/30", 
        "license": ["MIT"], 
        "Authors": [{ "name": "Jesse O'Brien", "email": "jesse@jesse-obrien.ca", "homepage": "http://jesse-obrien.ca", "role": "Developer" }],
        "require": {
            "foo/bar": "1.0",
            "foo/baz": "2.0"
        }
    }`

    manifest := *NewManifest()
    json.Unmarshal([]byte(test), &manifest)
    fmt.Println(manifest)
    fmt.Println(manifest.Name)
}