FilesExpand file tree

development

/

cat-file.c

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

229 lines (190 loc) · 4.99 KB

development

/

cat-file.c

Copy path

Top

File metadata and controls

• Code
• Blame

229 lines (190 loc) · 4.99 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

#include <stdio.h>

#include <git2.h>

#include <stdlib.h>

#include <string.h>

static git_repository *g_repo;

static void check(int error, const char *message)

{

if (error) {

fprintf(stderr, "%s (%d)\n", message, error);

exit(1);

}

}

static void usage(const char *message, const char *arg)

{

if (message && arg)

fprintf(stderr, "%s: %s\n", message, arg);

else if (message)

fprintf(stderr, "%s\n", message);

fprintf(stderr, "usage: cat-file (-t | -s | -e | -p) [<options>] <object>\n");

exit(1);

}

static int check_str_param(

const char *arg, const char *pattern, const char **val)

{

size_t len = strlen(pattern);

if (strncmp(arg, pattern, len))

return 0;

*val = (const char *)(arg + len);

return 1;

}

static void print_signature(const char *header, const git_signature *sig)

{

char sign;

int offset, hours, minutes;

if (!sig)

return;

offset = sig->when.offset;

if (offset < 0) {

sign = '-';

offset = -offset;

} else {

sign = '+';

}

hours = offset / 60;

minutes = offset % 60;

printf("%s %s <%s> %ld %c%02d%02d\n",

header, sig->name, sig->email, (long)sig->when.time,

sign, hours, minutes);

}

static void show_blob(const git_blob *blob)

{

/* ? Does this need crlf filtering? */

fwrite(git_blob_rawcontent(blob), git_blob_rawsize(blob), 1, stdout);

}

static void show_tree(const git_tree *tree)

{

size_t i, max_i = (int)git_tree_entrycount(tree);

char oidstr[GIT_OID_HEXSZ + 1];

const git_tree_entry *te;

for (i = 0; i < max_i; ++i) {

te = git_tree_entry_byindex(tree, i);

git_oid_tostr(oidstr, sizeof(oidstr), git_tree_entry_id(te));

printf("%06o %s %s\t%s\n",

git_tree_entry_filemode(te),

git_object_type2string(git_tree_entry_type(te)),

oidstr, git_tree_entry_name(te));

}

}

static void show_commit(const git_commit *commit)

{

unsigned int i, max_i;

char oidstr[GIT_OID_HEXSZ + 1];

git_oid_tostr(oidstr, sizeof(oidstr), git_commit_tree_id(commit));

printf("tree %s\n", oidstr);

max_i = (unsigned int)git_commit_parentcount(commit);

for (i = 0; i < max_i; ++i) {

git_oid_tostr(oidstr, sizeof(oidstr), git_commit_parent_id(commit, i));

printf("parent %s\n", oidstr);

}

print_signature("author", git_commit_author(commit));

print_signature("committer", git_commit_committer(commit));

if (git_commit_message(commit))

printf("\n%s\n", git_commit_message(commit));

}

static void show_tag(const git_tag *tag)

{

char oidstr[GIT_OID_HEXSZ + 1];

git_oid_tostr(oidstr, sizeof(oidstr), git_tag_target_id(tag));;

printf("object %s\n", oidstr);

printf("type %s\n", git_object_type2string(git_tag_target_type(tag)));

printf("tag %s\n", git_tag_name(tag));

print_signature("tagger", git_tag_tagger(tag));

if (git_tag_message(tag))

printf("\n%s\n", git_tag_message(tag));

}

enum {

SHOW_TYPE = 1,

SHOW_SIZE = 2,

SHOW_NONE = 3,

SHOW_PRETTY = 4

};

int main(int argc, char *argv[])

{

const char *dir = ".", *rev = NULL;

int i, action = 0, verbose = 0;

git_object *obj = NULL;

char oidstr[GIT_OID_HEXSZ + 1];

git_threads_init();

for (i = 1; i < argc; ++i) {

char *a = argv[i];

if (a[0] != '-') {

if (rev != NULL)

usage("Only one rev should be provided", NULL);

else

rev = a;

}

else if (!strcmp(a, "-t"))

action = SHOW_TYPE;

else if (!strcmp(a, "-s"))

action = SHOW_SIZE;

else if (!strcmp(a, "-e"))

action = SHOW_NONE;

else if (!strcmp(a, "-p"))

action = SHOW_PRETTY;

else if (!strcmp(a, "-q"))

verbose = 0;

else if (!strcmp(a, "-v"))

verbose = 1;

else if (!strcmp(a, "--help") || !strcmp(a, "-h"))

usage(NULL, NULL);

else if (!check_str_param(a, "--git-dir=", &dir))

usage("Unknown option", a);

}

if (!action || !rev)

usage(NULL, NULL);

check(git_repository_open_ext(&g_repo, dir, 0, NULL),

"Could not open repository");

if (git_revparse_single(&obj, g_repo, rev) < 0) {

fprintf(stderr, "Could not resolve '%s'\n", rev);

exit(1);

}

if (verbose) {

char oidstr[GIT_OID_HEXSZ + 1];

git_oid_tostr(oidstr, sizeof(oidstr), git_object_id(obj));

printf("%s %s\n--\n",

git_object_type2string(git_object_type(obj)), oidstr);

}

switch (action) {

case SHOW_TYPE:

printf("%s\n", git_object_type2string(git_object_type(obj)));

break;

case SHOW_SIZE: {

git_odb *odb;

git_odb_object *odbobj;

check(git_repository_odb(&odb, g_repo), "Could not open ODB");

check(git_odb_read(&odbobj, odb, git_object_id(obj)),

"Could not find obj");

printf("%ld\n", (long)git_odb_object_size(odbobj));

git_odb_object_free(odbobj);

git_odb_free(odb);

}

break;

case SHOW_NONE:

/* just want return result */

break;

case SHOW_PRETTY:

switch (git_object_type(obj)) {

case GIT_OBJ_BLOB:

show_blob((const git_blob *)obj);

break;

case GIT_OBJ_COMMIT:

show_commit((const git_commit *)obj);

break;

case GIT_OBJ_TREE:

show_tree((const git_tree *)obj);

break;

case GIT_OBJ_TAG:

show_tag((const git_tag *)obj);

break;

default:

printf("unknown %s\n", oidstr);

break;

}

break;

}

git_object_free(obj);

git_repository_free(g_repo);

git_threads_shutdown();

return 0;

}