Merge branch 'jh/status-aheadbehind'
[git] / t / helper / test-path-utils.c
1 #include "test-tool.h"
2 #include "cache.h"
3 #include "string-list.h"
4 #include "utf8.h"
5
6 /*
7  * A "string_list_each_func_t" function that normalizes an entry from
8  * GIT_CEILING_DIRECTORIES.  If the path is unusable for some reason,
9  * die with an explanation.
10  */
11 static int normalize_ceiling_entry(struct string_list_item *item, void *unused)
12 {
13         char *ceil = item->string;
14
15         if (!*ceil)
16                 die("Empty path is not supported");
17         if (!is_absolute_path(ceil))
18                 die("Path \"%s\" is not absolute", ceil);
19         if (normalize_path_copy(ceil, ceil) < 0)
20                 die("Path \"%s\" could not be normalized", ceil);
21         return 1;
22 }
23
24 static void normalize_argv_string(const char **var, const char *input)
25 {
26         if (!strcmp(input, "<null>"))
27                 *var = NULL;
28         else if (!strcmp(input, "<empty>"))
29                 *var = "";
30         else
31                 *var = input;
32
33         if (*var && (**var == '<' || **var == '('))
34                 die("Bad value: %s\n", input);
35 }
36
37 struct test_data {
38         const char *from;  /* input:  transform from this ... */
39         const char *to;    /* output: ... to this.            */
40         const char *alternative; /* output: ... or this.      */
41 };
42
43 /*
44  * Compatibility wrappers for OpenBSD, whose basename(3) and dirname(3)
45  * have const parameters.
46  */
47 static char *posix_basename(char *path)
48 {
49         return basename(path);
50 }
51
52 static char *posix_dirname(char *path)
53 {
54         return dirname(path);
55 }
56
57 static int test_function(struct test_data *data, char *(*func)(char *input),
58         const char *funcname)
59 {
60         int failed = 0, i;
61         char buffer[1024];
62         char *to;
63
64         for (i = 0; data[i].to; i++) {
65                 if (!data[i].from)
66                         to = func(NULL);
67                 else {
68                         xsnprintf(buffer, sizeof(buffer), "%s", data[i].from);
69                         to = func(buffer);
70                 }
71                 if (!strcmp(to, data[i].to))
72                         continue;
73                 if (!data[i].alternative)
74                         error("FAIL: %s(%s) => '%s' != '%s'\n",
75                                 funcname, data[i].from, to, data[i].to);
76                 else if (!strcmp(to, data[i].alternative))
77                         continue;
78                 else
79                         error("FAIL: %s(%s) => '%s' != '%s', '%s'\n",
80                                 funcname, data[i].from, to, data[i].to,
81                                 data[i].alternative);
82                 failed = 1;
83         }
84         return failed;
85 }
86
87 static struct test_data basename_data[] = {
88         /* --- POSIX type paths --- */
89         { NULL,              "."    },
90         { "",                "."    },
91         { ".",               "."    },
92         { "..",              ".."   },
93         { "/",               "/"    },
94         { "//",              "/", "//" },
95         { "///",             "/", "//" },
96         { "////",            "/", "//" },
97         { "usr",             "usr"  },
98         { "/usr",            "usr"  },
99         { "/usr/",           "usr"  },
100         { "/usr//",          "usr"  },
101         { "/usr/lib",        "lib"  },
102         { "usr/lib",         "lib"  },
103         { "usr/lib///",      "lib"  },
104
105 #if defined(__MINGW32__) || defined(_MSC_VER)
106         /* --- win32 type paths --- */
107         { "\\usr",           "usr"  },
108         { "\\usr\\",         "usr"  },
109         { "\\usr\\\\",       "usr"  },
110         { "\\usr\\lib",      "lib"  },
111         { "usr\\lib",        "lib"  },
112         { "usr\\lib\\\\\\",  "lib"  },
113         { "C:/usr",          "usr"  },
114         { "C:/usr",          "usr"  },
115         { "C:/usr/",         "usr"  },
116         { "C:/usr//",        "usr"  },
117         { "C:/usr/lib",      "lib"  },
118         { "C:usr/lib",       "lib"  },
119         { "C:usr/lib///",    "lib"  },
120         { "C:",              "."    },
121         { "C:a",             "a"    },
122         { "C:/",             "/"    },
123         { "C:///",           "/"    },
124         { "\\",              "\\", "/" },
125         { "\\\\",            "\\", "/" },
126         { "\\\\\\",          "\\", "/" },
127 #endif
128         { NULL,              NULL   }
129 };
130
131 static struct test_data dirname_data[] = {
132         /* --- POSIX type paths --- */
133         { NULL,              "."      },
134         { "",                "."      },
135         { ".",               "."      },
136         { "..",              "."      },
137         { "/",               "/"      },
138         { "//",              "/", "//" },
139         { "///",             "/", "//" },
140         { "////",            "/", "//" },
141         { "usr",             "."      },
142         { "/usr",            "/"      },
143         { "/usr/",           "/"      },
144         { "/usr//",          "/"      },
145         { "/usr/lib",        "/usr"   },
146         { "usr/lib",         "usr"    },
147         { "usr/lib///",      "usr"    },
148
149 #if defined(__MINGW32__) || defined(_MSC_VER)
150         /* --- win32 type paths --- */
151         { "\\",              "\\"     },
152         { "\\\\",            "\\\\"   },
153         { "\\usr",           "\\"     },
154         { "\\usr\\",         "\\"     },
155         { "\\usr\\\\",       "\\"     },
156         { "\\usr\\lib",      "\\usr"  },
157         { "usr\\lib",        "usr"    },
158         { "usr\\lib\\\\\\",  "usr"    },
159         { "C:a",             "C:."    },
160         { "C:/",             "C:/"    },
161         { "C:///",           "C:/"    },
162         { "C:/usr",          "C:/"    },
163         { "C:/usr/",         "C:/"    },
164         { "C:/usr//",        "C:/"    },
165         { "C:/usr/lib",      "C:/usr" },
166         { "C:usr/lib",       "C:usr"  },
167         { "C:usr/lib///",    "C:usr"  },
168         { "\\\\\\",          "\\"     },
169         { "\\\\\\\\",        "\\"     },
170         { "C:",              "C:.", "." },
171 #endif
172         { NULL,              NULL     }
173 };
174
175 static int is_dotgitmodules(const char *path)
176 {
177         return is_hfs_dotgitmodules(path) || is_ntfs_dotgitmodules(path);
178 }
179
180 static int cmp_by_st_size(const void *a, const void *b)
181 {
182         intptr_t x = (intptr_t)((struct string_list_item *)a)->util;
183         intptr_t y = (intptr_t)((struct string_list_item *)b)->util;
184
185         return x > y ? -1 : (x < y ? +1 : 0);
186 }
187
188 int cmd__path_utils(int argc, const char **argv)
189 {
190         if (argc == 3 && !strcmp(argv[1], "normalize_path_copy")) {
191                 char *buf = xmallocz(strlen(argv[2]));
192                 int rv = normalize_path_copy(buf, argv[2]);
193                 if (rv)
194                         buf = "++failed++";
195                 puts(buf);
196                 return 0;
197         }
198
199         if (argc >= 2 && !strcmp(argv[1], "real_path")) {
200                 while (argc > 2) {
201                         puts(real_path(argv[2]));
202                         argc--;
203                         argv++;
204                 }
205                 return 0;
206         }
207
208         if (argc >= 2 && !strcmp(argv[1], "absolute_path")) {
209                 while (argc > 2) {
210                         puts(absolute_path(argv[2]));
211                         argc--;
212                         argv++;
213                 }
214                 return 0;
215         }
216
217         if (argc == 4 && !strcmp(argv[1], "longest_ancestor_length")) {
218                 int len;
219                 struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
220                 char *path = xstrdup(argv[2]);
221
222                 /*
223                  * We have to normalize the arguments because under
224                  * Windows, bash mangles arguments that look like
225                  * absolute POSIX paths or colon-separate lists of
226                  * absolute POSIX paths into DOS paths (e.g.,
227                  * "/foo:/foo/bar" might be converted to
228                  * "D:\Src\msysgit\foo;D:\Src\msysgit\foo\bar"),
229                  * whereas longest_ancestor_length() requires paths
230                  * that use forward slashes.
231                  */
232                 if (normalize_path_copy(path, path))
233                         die("Path \"%s\" could not be normalized", argv[2]);
234                 string_list_split(&ceiling_dirs, argv[3], PATH_SEP, -1);
235                 filter_string_list(&ceiling_dirs, 0,
236                                    normalize_ceiling_entry, NULL);
237                 len = longest_ancestor_length(path, &ceiling_dirs);
238                 string_list_clear(&ceiling_dirs, 0);
239                 free(path);
240                 printf("%d\n", len);
241                 return 0;
242         }
243
244         if (argc >= 4 && !strcmp(argv[1], "prefix_path")) {
245                 const char *prefix = argv[2];
246                 int prefix_len = strlen(prefix);
247                 int nongit_ok;
248                 setup_git_directory_gently(&nongit_ok);
249                 while (argc > 3) {
250                         puts(prefix_path(prefix, prefix_len, argv[3]));
251                         argc--;
252                         argv++;
253                 }
254                 return 0;
255         }
256
257         if (argc == 4 && !strcmp(argv[1], "strip_path_suffix")) {
258                 char *prefix = strip_path_suffix(argv[2], argv[3]);
259                 printf("%s\n", prefix ? prefix : "(null)");
260                 return 0;
261         }
262
263         if (argc == 3 && !strcmp(argv[1], "print_path")) {
264                 puts(argv[2]);
265                 return 0;
266         }
267
268         if (argc == 4 && !strcmp(argv[1], "relative_path")) {
269                 struct strbuf sb = STRBUF_INIT;
270                 const char *in, *prefix, *rel;
271                 normalize_argv_string(&in, argv[2]);
272                 normalize_argv_string(&prefix, argv[3]);
273                 rel = relative_path(in, prefix, &sb);
274                 if (!rel)
275                         puts("(null)");
276                 else
277                         puts(strlen(rel) > 0 ? rel : "(empty)");
278                 strbuf_release(&sb);
279                 return 0;
280         }
281
282         if (argc == 2 && !strcmp(argv[1], "basename"))
283                 return test_function(basename_data, posix_basename, argv[1]);
284
285         if (argc == 2 && !strcmp(argv[1], "dirname"))
286                 return test_function(dirname_data, posix_dirname, argv[1]);
287
288         if (argc > 2 && !strcmp(argv[1], "is_dotgitmodules")) {
289                 int res = 0, expect = 1, i;
290                 for (i = 2; i < argc; i++)
291                         if (!strcmp("--not", argv[i]))
292                                 expect = !expect;
293                         else if (expect != is_dotgitmodules(argv[i]))
294                                 res = error("'%s' is %s.gitmodules", argv[i],
295                                             expect ? "not " : "");
296                         else
297                                 fprintf(stderr, "ok: '%s' is %s.gitmodules\n",
298                                         argv[i], expect ? "" : "not ");
299                 return !!res;
300         }
301
302         if (argc > 2 && !strcmp(argv[1], "file-size")) {
303                 int res = 0, i;
304                 struct stat st;
305
306                 for (i = 2; i < argc; i++)
307                         if (stat(argv[i], &st))
308                                 res = error_errno("Cannot stat '%s'", argv[i]);
309                         else
310                                 printf("%"PRIuMAX"\n", (uintmax_t)st.st_size);
311                 return !!res;
312         }
313
314         if (argc == 4 && !strcmp(argv[1], "skip-n-bytes")) {
315                 int fd = open(argv[2], O_RDONLY), offset = atoi(argv[3]);
316                 char buffer[65536];
317
318                 if (fd < 0)
319                         die_errno("could not open '%s'", argv[2]);
320                 if (lseek(fd, offset, SEEK_SET) < 0)
321                         die_errno("could not skip %d bytes", offset);
322                 for (;;) {
323                         ssize_t count = read(fd, buffer, sizeof(buffer));
324                         if (count < 0)
325                                 die_errno("could not read '%s'", argv[2]);
326                         if (!count)
327                                 break;
328                         if (write(1, buffer, count) < 0)
329                                 die_errno("could not write to stdout");
330                 }
331                 close(fd);
332                 return 0;
333         }
334
335         if (argc > 5 && !strcmp(argv[1], "slice-tests")) {
336                 int res = 0;
337                 long offset, stride, i;
338                 struct string_list list = STRING_LIST_INIT_NODUP;
339                 struct stat st;
340
341                 offset = strtol(argv[2], NULL, 10);
342                 stride = strtol(argv[3], NULL, 10);
343                 if (stride < 1)
344                         stride = 1;
345                 for (i = 4; i < argc; i++)
346                         if (stat(argv[i], &st))
347                                 res = error_errno("Cannot stat '%s'", argv[i]);
348                         else
349                                 string_list_append(&list, argv[i])->util =
350                                         (void *)(intptr_t)st.st_size;
351                 QSORT(list.items, list.nr, cmp_by_st_size);
352                 for (i = offset; i < list.nr; i+= stride)
353                         printf("%s\n", list.items[i].string);
354
355                 return !!res;
356         }
357
358         fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
359                 argv[1] ? argv[1] : "(there was none)");
360         return 1;
361 }