FilesExpand file tree

development

/

branch.c

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

328 lines (257 loc) · 7.69 KB

development

/

branch.c

Copy path

Top

File metadata and controls

• Code
• Blame

328 lines (257 loc) · 7.69 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

/*

* Copyright (C) 2009-2012 the libgit2 contributors

*

* This file is part of libgit2, distributed under the GNU GPL v2 with

* a Linking Exception. For full terms see the included COPYING file.

*/

#include "common.h"

#include "commit.h"

#include "tag.h"

#include "config.h"

#include "refspec.h"

#include "git2/branch.h"

static int retrieve_branch_reference(

git_reference **branch_reference_out,

git_repository *repo,

const char *branch_name,

int is_remote)

{

git_reference *branch;

int error = -1;

char *prefix;

git_buf ref_name = GIT_BUF_INIT;

*branch_reference_out = NULL;

prefix = is_remote ? GIT_REFS_REMOTES_DIR : GIT_REFS_HEADS_DIR;

if (git_buf_joinpath(&ref_name, prefix, branch_name) < 0)

goto cleanup;

if ((error = git_reference_lookup(&branch, repo, ref_name.ptr)) < 0) {

giterr_set(GITERR_REFERENCE,

"Cannot locate %s branch '%s'.", is_remote ? "remote-tracking" : "local", branch_name);

goto cleanup;

}

*branch_reference_out = branch;

cleanup:

git_buf_free(&ref_name);

return error;

}

static int create_error_invalid(const char *msg)

{

giterr_set(GITERR_INVALID, "Cannot create branch - %s", msg);

return -1;

}

static int not_a_local_branch(git_reference *ref)

{

giterr_set(GITERR_INVALID, "Reference '%s' is not a local branch.", git_reference_name(ref));

return -1;

}

int git_branch_create(

git_reference **ref_out,

git_repository *repository,

const char *branch_name,

const git_object *target,

int force)

{

git_object *commit = NULL;

git_reference *branch = NULL;

git_buf canonical_branch_name = GIT_BUF_INIT;

int error = -1;

assert(branch_name && target && ref_out);

assert(git_object_owner(target) == repository);

if (git_object_peel(&commit, (git_object *)target, GIT_OBJ_COMMIT) < 0)

return create_error_invalid("The given target does not resolve to a commit");

if (git_buf_joinpath(&canonical_branch_name, GIT_REFS_HEADS_DIR, branch_name) < 0)

goto cleanup;

error = git_reference_create_oid(&branch, repository,

git_buf_cstr(&canonical_branch_name), git_object_id(commit), force);

if (!error)

*ref_out = branch;

cleanup:

git_object_free(commit);

git_buf_free(&canonical_branch_name);

return error;

}

int git_branch_delete(git_reference *branch)

{

int is_head;

git_buf config_section = GIT_BUF_INIT;

int error = -1;

assert(branch);

if (!git_reference_is_branch(branch) &&

!git_reference_is_remote(branch)) {

giterr_set(GITERR_INVALID, "Reference '%s' is not a valid branch.", git_reference_name(branch));

return -1;

}

if ((is_head = git_branch_is_head(branch)) < 0)

return is_head;

if (is_head) {

giterr_set(GITERR_REFERENCE,

"Cannot delete branch '%s' as it is the current HEAD of the repository.", git_reference_name(branch));

return -1;

}

if (git_buf_printf(&config_section, "branch.%s", git_reference_name(branch) + strlen(GIT_REFS_HEADS_DIR)) < 0)

goto on_error;

if (git_config_rename_section(

git_reference_owner(branch),

git_buf_cstr(&config_section),

NULL) < 0)

goto on_error;

if (git_reference_delete(branch) < 0)

goto on_error;

error = 0;

on_error:

git_buf_free(&config_section);

return error;

}

typedef struct {

int (*branch_cb)(

const char *branch_name,

git_branch_t branch_type,

void *payload);

void *callback_payload;

unsigned int branch_type;

} branch_foreach_filter;

static int branch_foreach_cb(const char *branch_name, void *payload)

{

branch_foreach_filter *filter = (branch_foreach_filter *)payload;

if (filter->branch_type & GIT_BRANCH_LOCAL &&

git__prefixcmp(branch_name, GIT_REFS_HEADS_DIR) == 0)

return filter->branch_cb(branch_name + strlen(GIT_REFS_HEADS_DIR), GIT_BRANCH_LOCAL, filter->callback_payload);

if (filter->branch_type & GIT_BRANCH_REMOTE &&

git__prefixcmp(branch_name, GIT_REFS_REMOTES_DIR) == 0)

return filter->branch_cb(branch_name + strlen(GIT_REFS_REMOTES_DIR), GIT_BRANCH_REMOTE, filter->callback_payload);

return 0;

}

int git_branch_foreach(

git_repository *repo,

unsigned int list_flags,

int (*branch_cb)(

const char *branch_name,

git_branch_t branch_type,

void *payload),

void *payload

)

{

branch_foreach_filter filter;

filter.branch_cb = branch_cb;

filter.branch_type = list_flags;

filter.callback_payload = payload;

return git_reference_foreach(repo, GIT_REF_LISTALL, &branch_foreach_cb, (void *)&filter);

}

int git_branch_move(

git_reference *branch,

const char *new_branch_name,

int force)

{

git_buf new_reference_name = GIT_BUF_INIT,

old_config_section = GIT_BUF_INIT,

new_config_section = GIT_BUF_INIT;

int error;

assert(branch && new_branch_name);

if (!git_reference_is_branch(branch))

return not_a_local_branch(branch);

if ((error = git_buf_joinpath(&new_reference_name, GIT_REFS_HEADS_DIR, new_branch_name)) < 0)

goto cleanup;

if (git_buf_printf(

&old_config_section,

"branch.%s",

git_reference_name(branch) + strlen(GIT_REFS_HEADS_DIR)) < 0)

goto cleanup;

if ((error = git_reference_rename(branch, git_buf_cstr(&new_reference_name), force)) < 0)

goto cleanup;

if (git_buf_printf(&new_config_section, "branch.%s", new_branch_name) < 0)

goto cleanup;

if ((error = git_config_rename_section(

git_reference_owner(branch),

git_buf_cstr(&old_config_section),

git_buf_cstr(&new_config_section))) < 0)

goto cleanup;

cleanup:

git_buf_free(&new_reference_name);

git_buf_free(&old_config_section);

git_buf_free(&new_config_section);

return error;

}

int git_branch_lookup(

git_reference **ref_out,

git_repository *repo,

const char *branch_name,

git_branch_t branch_type)

{

assert(ref_out && repo && branch_name);

return retrieve_branch_reference(ref_out, repo, branch_name, branch_type == GIT_BRANCH_REMOTE);

}

static int retrieve_tracking_configuration(

const char **out, git_reference *branch, const char *format)

{

git_config *config;

git_buf buf = GIT_BUF_INIT;

int error;

if (git_repository_config__weakptr(&config, git_reference_owner(branch)) < 0)

return -1;

if (git_buf_printf(&buf, format,

git_reference_name(branch) + strlen(GIT_REFS_HEADS_DIR)) < 0)

return -1;

error = git_config_get_string(out, config, git_buf_cstr(&buf));

git_buf_free(&buf);

return error;

}

int git_branch_tracking(

git_reference **tracking_out,

git_reference *branch)

{

const char *remote_name, *merge_name;

git_buf buf = GIT_BUF_INIT;

int error = -1;

git_remote *remote = NULL;

const git_refspec *refspec;

assert(tracking_out && branch);

if (!git_reference_is_branch(branch))

return not_a_local_branch(branch);

if ((error = retrieve_tracking_configuration(&remote_name, branch, "branch.%s.remote")) < 0)

goto cleanup;

if ((error = retrieve_tracking_configuration(&merge_name, branch, "branch.%s.merge")) < 0)

goto cleanup;

if (strcmp(".", remote_name) != 0) {

if ((error = git_remote_load(&remote, git_reference_owner(branch), remote_name)) < 0)

goto cleanup;

refspec = git_remote_fetchspec(remote);

if (refspec == NULL

|| refspec->src == NULL

|| refspec->dst == NULL) {

error = GIT_ENOTFOUND;

goto cleanup;

}

if (git_refspec_transform_r(&buf, refspec, merge_name) < 0)

goto cleanup;

} else

if (git_buf_sets(&buf, merge_name) < 0)

goto cleanup;

error = git_reference_lookup(

tracking_out,

git_reference_owner(branch),

git_buf_cstr(&buf));

cleanup:

git_remote_free(remote);

git_buf_free(&buf);

return error;

}

int git_branch_is_head(

git_reference *branch)

{

git_reference *head;

bool is_same = false;

int error;

assert(branch);

if (!git_reference_is_branch(branch))

return false;

error = git_repository_head(&head, git_reference_owner(branch));

if (error == GIT_EORPHANEDHEAD)

return false;

if (error < 0)

return -1;

is_same = strcmp(

git_reference_name(branch),

git_reference_name(head)) == 0;

git_reference_free(head);

return is_same;

}