sascha-andres/git-commit

package v2

import (
    "os"

    "github.com/imdario/mergo"
    "github.com/pkg/errors"
    "gopkg.in/yaml.v2"
    "livingit.de/code/git-commit/hook/config"
)

// LoadConfig handles global and local configuration
func LoadConfig() (*Configuration, error) {
    cfg, err := loadGlobalConfig()
    if err != nil {
        return nil, err
    }

    commitMessageFile := os.Args[1]
    prjConfig, err := loadProjectConfiguration(commitMessageFile, cfg)
    if err != nil {
        return nil, err
    }

    if cfg == nil {
        cfg = prjConfig
    }

    if nil == cfg {
        return nil, errors.New("no suitable configuration found")
    }
    return cfg, nil
}

// loadProjectConfiguration loads a project specific configuration
func loadProjectConfiguration(commitMessageFile string, globalConfig *Configuration) (*Configuration, error) {
    var err error
    data, err := config.LoadProjectConfigFileContent(commitMessageFile)
    if err == nil && data != nil {
        var cfg Configuration
        err = yaml.Unmarshal(data, &cfg)
        if err != nil {
            return nil, err
        }
        if nil != globalConfig {
            if err = mergo.Merge(globalConfig, cfg, mergo.WithAppendSlice); err != nil {
                globalConfig = nil
            }
        } else {
            globalConfig = &cfg
        }
    }
    return globalConfig, err
}

// loadGlobalConfig loads the global configuration if present
func loadGlobalConfig() (*Configuration, error) {
    data, err := config.LoadGlobalConfigFileContent()
    if err != nil {
        return nil, err
    }
    var cfg Configuration
    err = yaml.Unmarshal(data, &cfg)
    if err != nil {
        return nil, err
    }
    return &cfg, nil
}