Merge pull request #42 from libgit2/cmn/config

Wrap some more config functions

1 files changed, 297 insertions, 6 deletions

diff --git a/config.go b/config.go
index 2aa073a..7665b20 100644
--- a/config.go
+++ b/config.go
@@ -10,11 +10,81 @@ import (
 	"unsafe"
 )
 
+type ConfigLevel int
+
+const (
+	// System-wide configuration file; /etc/gitconfig on Linux systems
+	ConfigLevelSystem ConfigLevel = C.GIT_CONFIG_LEVEL_SYSTEM
+
+	// XDG compatible configuration file; typically ~/.config/git/config
+	ConfigLevelXDG ConfigLevel = C.GIT_CONFIG_LEVEL_XDG
+
+	// User-specific configuration file (also called Global configuration
+	// file); typically ~/.gitconfig
+	ConfigLevelGlobal ConfigLevel = C.GIT_CONFIG_LEVEL_GLOBAL
+
+	// Repository specific configuration file; $WORK_DIR/.git/config on
+	// non-bare repos
+	ConfigLevelLocal ConfigLevel = C.GIT_CONFIG_LEVEL_LOCAL
+
+	// Application specific configuration file; freely defined by applications
+	ConfigLevelApp ConfigLevel = C.GIT_CONFIG_LEVEL_APP
+
+	// Represents the highest level available config file (i.e. the most
+	// specific config file available that actually is loaded)
+	ConfigLevelHighest ConfigLevel = C.GIT_CONFIG_HIGHEST_LEVEL
+)
+
+type ConfigEntry struct {
+	Name string
+	Value string
+	Level ConfigLevel
+}
+
+func newConfigEntryFromC(centry *C.git_config_entry) *ConfigEntry {
+	return &ConfigEntry{
+		Name: C.GoString(centry.name),
+		Value: C.GoString(centry.value),
+		Level: ConfigLevel(centry.level),
+	}
+}
+
 type Config struct {
 	ptr *C.git_config
 }
 
-func (c *Config) LookupInt32(name string) (v int32, err error) {
+// NewConfig creates a new empty configuration object
+func NewConfig() (*Config, error) {
+	config := new(Config)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if ret := C.git_config_new(&config.ptr); ret < 0 {
+		return nil, LastError()
+	}
+
+	return config, nil
+}
+
+// AddFile adds a file-backed backend to the config object at the specified level.
+func (c *Config) AddFile(path string, level ConfigLevel, force bool) error {
+	cpath := C.CString(path)
+	defer C.free(unsafe.Pointer(cpath))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+
+	ret := C.git_config_add_file_ondisk(c.ptr, cpath, C.git_config_level_t(level), cbool(force))
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (c *Config) LookupInt32(name string) (int32, error) {
 	var out C.int32_t
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))
@@ -30,7 +100,7 @@ func (c *Config) LookupInt32(name string) (v int32, err error) {
 	return int32(out), nil
 }
 
-func (c *Config) LookupInt64(name string) (v int64, err error) {
+func (c *Config) LookupInt64(name string) (int64, error) {
 	var out C.int64_t
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))
@@ -46,7 +116,7 @@ func (c *Config) LookupInt64(name string) (v int64, err error) {
 	return int64(out), nil
 }
 
-func (c *Config) LookupString(name string) (v string, err error) {
+func (c *Config) LookupString(name string) (string, error) {
 	var ptr *C.char
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))
@@ -54,15 +124,91 @@ func (c *Config) LookupString(name string) (v string, err error) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_config_get_string(&ptr, c.ptr, cname)
-	if ret < 0 {
+	if ret := C.git_config_get_string(&ptr, c.ptr, cname); ret < 0 {
 		return "", LastError()
 	}
 
 	return C.GoString(ptr), nil
 }
 
-func (c *Config) Set(name, value string) (err error) {
+
+func (c *Config) LookupBool(name string) (bool, error) {
+	var out C.int
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_get_bool(&out, c.ptr, cname)
+	if ret < 0 {
+		return false, LastError()
+	}
+
+	return out != 0, nil
+}
+
+func (c *Config) NewMultivarIterator(name, regexp string) (*ConfigIterator, error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	var cregexp *C.char
+	if regexp == "" {
+		cregexp = nil
+	} else {
+		cregexp = C.CString(regexp)
+		defer C.free(unsafe.Pointer(cregexp))
+	}
+
+	iter := new(ConfigIterator)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_multivar_iterator_new(&iter.ptr, c.ptr, cname, cregexp)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	runtime.SetFinalizer(iter, (*ConfigIterator).Free)
+	return iter, nil
+}
+
+// NewIterator creates an iterator over each entry in the
+// configuration
+func (c *Config) NewIterator() (*ConfigIterator, error) {
+	iter := new(ConfigIterator)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_iterator_new(&iter.ptr, c.ptr)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return iter, nil
+}
+
+// NewIteratorGlob creates an iterator over each entry in the
+// configuration whose name matches the given regular expression
+func (c *Config) NewIteratorGlob(regexp string) (*ConfigIterator, error) {
+	iter := new(ConfigIterator)
+	cregexp := C.CString(regexp)
+	defer C.free(unsafe.Pointer(cregexp))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_iterator_glob_new(&iter.ptr, c.ptr, cregexp)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return iter, nil
+}
+
+func (c *Config) SetString(name, value string) (err error) {
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))
 
@@ -84,3 +230,148 @@ func (c *Config) Free() {
 	runtime.SetFinalizer(c, nil)
 	C.git_config_free(c.ptr)
 }
+
+func (c *Config) SetInt32(name string, value int32) (err error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	ret := C.git_config_set_int32(c.ptr, cname, C.int32_t(value))
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (c *Config) SetInt64(name string, value int64) (err error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_set_int64(c.ptr, cname, C.int64_t(value))
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (c *Config) SetBool(name string, value bool) (err error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_set_bool(c.ptr, cname, cbool(value))
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (c *Config) SetMultivar(name, regexp, value string) (err error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	cregexp := C.CString(regexp)
+	defer C.free(unsafe.Pointer(cregexp))
+
+	cvalue := C.CString(value)
+	defer C.free(unsafe.Pointer(cvalue))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_set_multivar(c.ptr, cname, cregexp, cvalue)
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (c *Config) Delete(name string) error {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_delete_entry(c.ptr, cname)
+
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+// OpenLevel creates a single-level focused config object from a multi-level one
+func (c *Config) OpenLevel(parent *Config, level ConfigLevel) (*Config, error) {
+	config := new(Config)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_config_open_level(&config.ptr, parent.ptr, C.git_config_level_t(level))
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return config, nil
+}
+
+// OpenOndisk creates a new config instance containing a single on-disk file
+func OpenOndisk(parent *Config, path string) (*Config, error) {
+	cpath := C.CString(path)
+	defer C.free(unsafe.Pointer(cpath))
+
+	config := new(Config)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if ret := C.git_config_open_ondisk(&config.ptr, cpath); ret < 0 {
+		return nil, LastError()
+	}
+
+	return config, nil
+}
+
+// Refresh refreshes the configuration to reflect any changes made externally e.g. on disk
+func (c *Config) Refresh() error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if ret := C.git_config_refresh(c.ptr); ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+type ConfigIterator struct {
+	ptr *C.git_config_iterator
+}
+
+// Next returns the next entry for this iterator
+func (iter *ConfigIterator) Next() (*ConfigEntry, error) {
+	var centry *C.git_config_entry
+
+	ret := C.git_config_next(&centry, iter.ptr)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return newConfigEntryFromC(centry), nil
+}
+
+func (iter *ConfigIterator) Free() {
+	runtime.SetFinalizer(iter, nil)
+	C.free(unsafe.Pointer(iter.ptr))
+}
+