cpg1111/maestro

/*
Copyright 2016 Christian Grabowski All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package credentials

import (
    "os/user"
    "strings"

    "github.com/cpg1111/maestro/config"

    prompt "github.com/segmentio/go-prompt"
    git "gopkg.in/libgit2/git2go.v24"
)

// RawCredentials is a struct for any credentials
type RawCredentials struct {
    project    config.Project
    SSHPrivKey string
    SSHPubKey  string
    Username   string
    Password   string
}

// ToGitCredentials converts RawCredentials to Git credentials
func (rc *RawCredentials) ToGitCredentials() git.Cred {
    var (
        num   int
        creds git.Cred
    )
    switch strings.ToLower(rc.project.AuthType) {
    case "ssh":
        num, creds = git.NewCredSshKey(rc.Username, rc.SSHPubKey, rc.SSHPrivKey, rc.Password)
        if num != 0 {
            panic("GIT ERROR WHEN LOADING CREDENTIALS")
        }
        return creds
    case "http":
        num, creds = git.NewCredUserpassPlaintext(rc.Username, rc.Password)
        if num != 0 {
            panic("GIT ERROR WHEN LOADING CREDENTIALS")
        }
        return creds
    }
    return creds
}

func readKey(path string) (string, error) {
    fullPath := path
    if strings.Contains(path, "~") {
        currUser, err := user.Current()
        if err != nil {
            return "", err
        }
        fullPath = strings.Replace(path, "~", currUser.HomeDir, 1)
    }
    return fullPath, nil
}

// NewCreds returns a pointer to a new instance of RawCredentials
func NewCreds(project *config.Project) (*RawCredentials, error) {
    var (
        privKey, pubKey, pwd string
        err                  error
    )
    if strings.Contains(strings.ToLower(project.AuthType), "ssh") {
        privKey, err = readKey(project.SSHPrivKeyPath)
        if err != nil {
            return nil, err
        }
        pubKey, err = readKey(project.SSHPubKeyPath)
        if err != nil {
            return nil, err
        }
    }
    if project.PromptForPWD {
        pwd = prompt.PasswordMasked("Please Enter Your Password")
    } else {
        pwd = project.Password
    }
    creds := &RawCredentials{
        project:    *project,
        SSHPrivKey: privKey,
        SSHPubKey:  pubKey,
        Username:   project.Username,
        Password:   pwd,
    }
    return creds, nil
}