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5 | 5 | static int inside_git_dir = -1;
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6 | 6 | static int inside_work_tree = -1;
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7 | 7 |
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| 8 | +/* |
| 9 | + * The input parameter must contain an absolute path, and it must already be |
| 10 | + * normalized. |
| 11 | + * |
| 12 | + * Find the part of an absolute path that lies inside the work tree by |
| 13 | + * dereferencing symlinks outside the work tree, for example: |
| 14 | + * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file |
| 15 | + * /dir/file (work tree is /) -> dir/file |
| 16 | + * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 |
| 17 | + * /dir/repolink/file (repolink points to /dir/repo) -> file |
| 18 | + * /dir/repo (exactly equal to work tree) -> (empty string) |
| 19 | + */ |
| 20 | +static int abspath_part_inside_repo(char *path) |
| 21 | +{ |
| 22 | + size_t len; |
| 23 | + size_t wtlen; |
| 24 | + char *path0; |
| 25 | + int off; |
| 26 | + const char *work_tree = get_git_work_tree(); |
| 27 | + |
| 28 | + if (!work_tree) |
| 29 | + return -1; |
| 30 | + wtlen = strlen(work_tree); |
| 31 | + len = strlen(path); |
| 32 | + off = 0; |
| 33 | + |
| 34 | + /* check if work tree is already the prefix */ |
| 35 | + if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { |
| 36 | + if (path[wtlen] == '/') { |
| 37 | + memmove(path, path + wtlen + 1, len - wtlen); |
| 38 | + return 0; |
| 39 | + } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { |
| 40 | + /* work tree is the root, or the whole path */ |
| 41 | + memmove(path, path + wtlen, len - wtlen + 1); |
| 42 | + return 0; |
| 43 | + } |
| 44 | + /* work tree might match beginning of a symlink to work tree */ |
| 45 | + off = wtlen; |
| 46 | + } |
| 47 | + path0 = path; |
| 48 | + path += offset_1st_component(path) + off; |
| 49 | + |
| 50 | + /* check each '/'-terminated level */ |
| 51 | + while (*path) { |
| 52 | + path++; |
| 53 | + if (*path == '/') { |
| 54 | + *path = '\0'; |
| 55 | + if (strcmp(real_path(path0), work_tree) == 0) { |
| 56 | + memmove(path0, path + 1, len - (path - path0)); |
| 57 | + return 0; |
| 58 | + } |
| 59 | + *path = '/'; |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + /* check whole path */ |
| 64 | + if (strcmp(real_path(path0), work_tree) == 0) { |
| 65 | + *path0 = '\0'; |
| 66 | + return 0; |
| 67 | + } |
| 68 | + |
| 69 | + return -1; |
| 70 | +} |
| 71 | + |
8 | 72 | /*
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9 | 73 | * Normalize "path", prepending the "prefix" for relative paths. If
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10 | 74 | * remaining_prefix is not NULL, return the actual prefix still
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