2017-10-18 18:22:45 +00:00
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package git
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import (
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"os"
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"path/filepath"
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"strings"
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"sync"
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"github.com/rubyist/tracerx"
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)
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var Config = &Configuration{}
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// Configuration can fetch or modify the current Git config and track the Git
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// version.
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type Configuration struct {
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WorkDir string
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GitDir string
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version string
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mu sync.Mutex
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}
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2017-10-25 19:47:13 +00:00
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func NewConfig(workdir, gitdir string) *Configuration {
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if len(gitdir) == 0 && len(workdir) > 0 {
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gitdir = filepath.Join(workdir, ".git")
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}
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return &Configuration{WorkDir: workdir, GitDir: gitdir}
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}
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func ParseConfigLines(lines string, onlySafeKeys bool) *ConfigurationSource {
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return &ConfigurationSource{
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Lines: strings.Split(lines, "\n"),
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OnlySafeKeys: onlySafeKeys,
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}
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}
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type ConfigurationSource struct {
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Lines []string
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OnlySafeKeys bool
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}
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// Find returns the git config value for the key
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func (c *Configuration) Find(val string) string {
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output, _ := c.git("config", val)
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return output
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}
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// FindGlobal returns the git config value global scope for the key
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func (c *Configuration) FindGlobal(key string) string {
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output, _ := c.git("config", "--global", key)
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return output
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}
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// FindSystem returns the git config value in system scope for the key
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func (c *Configuration) FindSystem(key string) string {
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output, _ := c.git("config", "--system", key)
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return output
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}
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// Find returns the git config value for the key
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func (c *Configuration) FindLocal(key string) string {
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output, _ := c.git("config", "--local", key)
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return output
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}
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// SetGlobal sets the git config value for the key in the global config
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func (c *Configuration) SetGlobal(key, val string) (string, error) {
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return c.git("config", "--global", "--replace-all", key, val)
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}
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// SetSystem sets the git config value for the key in the system config
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func (c *Configuration) SetSystem(key, val string) (string, error) {
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return c.git("config", "--system", "--replace-all", key, val)
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}
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// UnsetGlobalSection removes the entire named section from the global config
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func (c *Configuration) UnsetGlobalSection(key string) (string, error) {
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return c.git("config", "--global", "--remove-section", key)
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}
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// UnsetSystemSection removes the entire named section from the system config
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func (c *Configuration) UnsetSystemSection(key string) (string, error) {
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return c.git("config", "--system", "--remove-section", key)
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}
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// UnsetLocalSection removes the entire named section from the system config
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func (c *Configuration) UnsetLocalSection(key string) (string, error) {
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return c.git("config", "--local", "--remove-section", key)
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}
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// SetLocal sets the git config value for the key in the specified config file
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func (c *Configuration) SetLocal(file, key, val string) (string, error) {
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args := make([]string, 0, 5)
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if len(file) > 0 {
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args = append(args, "--file", file)
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}
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return c.git("config", append(args, "--replace-all", key, val)...)
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}
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// UnsetLocalKey removes the git config value for the key from the specified config file
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func (c *Configuration) UnsetLocalKey(file, key string) (string, error) {
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args := make([]string, 0, 4)
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if len(file) > 0 {
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args = append(args, "--file", file)
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}
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return c.git("config", append(args, "--unset", key)...)
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}
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func (c *Configuration) Sources(optionalFilename string) ([]*ConfigurationSource, error) {
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gitconfig, err := c.Source()
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if err != nil {
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return nil, err
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}
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fileconfig, err := c.FileSource(optionalFilename)
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if err != nil && !os.IsNotExist(err) {
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return nil, err
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}
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configs := make([]*ConfigurationSource, 0, 2)
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if fileconfig != nil {
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configs = append(configs, fileconfig)
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}
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return append(configs, gitconfig), nil
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}
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func (c *Configuration) FileSource(filename string) (*ConfigurationSource, error) {
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if _, err := os.Stat(filename); err != nil {
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return nil, err
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}
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out, err := c.git("config", "-l", "-f", filename)
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if err != nil {
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return nil, err
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}
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return ParseConfigLines(out, true), nil
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}
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func (c *Configuration) Source() (*ConfigurationSource, error) {
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out, err := c.git("config", "-l")
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if err != nil {
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return nil, err
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}
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return ParseConfigLines(out, false), nil
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}
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// Version returns the git version
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func (c *Configuration) Version() (string, error) {
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c.mu.Lock()
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defer c.mu.Unlock()
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if len(c.version) == 0 {
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v, err := gitSimple("version")
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if err != nil {
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return v, err
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}
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c.version = v
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}
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return c.version, nil
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}
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// IsVersionAtLeast returns whether the git version is the one specified or higher
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// argument is plain version string separated by '.' e.g. "2.3.1" but can omit minor/patch
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func (c *Configuration) IsGitVersionAtLeast(ver string) bool {
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gitver, err := c.Version()
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if err != nil {
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tracerx.Printf("Error getting git version: %v", err)
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return false
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}
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return IsVersionAtLeast(gitver, ver)
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}
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func (c *Configuration) git(subcmd string, args ...string) (string, error) {
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cmd := make([]string, 1, len(args)+3)
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cmd[0] = subcmd
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if len(c.GitDir) > 0 {
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cmd = append(cmd, "--git-dir", c.GitDir)
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}
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if len(c.WorkDir) > 0 {
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cmd = append(cmd, "--work-tree", c.WorkDir)
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}
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return gitSimple(append(cmd, args...)...)
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}
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