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Fix to check for case insensitive filesystems in is_potential_path

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Addresses https://github.com/fish-shell/fish-shell/issues/119
This commit is contained in:
ridiculousfish 2012-06-16 14:08:58 -07:00
parent afd8d2f9ba
commit 6cf42075fc
1 changed files with 43 additions and 4 deletions
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47
highlight.cpp
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@ -103,6 +103,28 @@ static wcstring apply_working_directory(const wcstring &path, const wcstring &wo
}
}
/* Determine if the filesystem containing the given fd is case insensitive. */
typedef std::map<wcstring, bool> case_sensitivity_cache_t;
bool fs_is_case_insensitive(const wcstring &path, int fd, case_sensitivity_cache_t &case_sensitivity_cache)
{
/* If _PC_CASE_SENSITIVE is not defined, assume case sensitive */
bool result = false;
#ifdef _PC_CASE_SENSITIVE
/* Try the cache first */
case_sensitivity_cache_t::iterator cache = case_sensitivity_cache.find(path);
if (cache != case_sensitivity_cache.end()) {
/* Use the cached value */
result = cache->second;
} else {
/* Ask the system. A -1 value means error (so assume case sensitive), a 1 value means case sensitive, and a 0 value means case insensitive */
long ret = fpathconf(fd, _PC_CASE_SENSITIVE);
result = (ret == 0);
case_sensitivity_cache[path] = result;
}
#endif
return result;
}
/* Tests whether the specified string cpath is the prefix of anything we could cd to. directories is a list of possible parent directories (typically either the working directory, or the cdpath). This does I/O!
*/
bool is_potential_path(const wcstring &const_path, const wcstring_list_t &directories, bool require_dir, wcstring *out_path)
@ -161,6 +183,9 @@ bool is_potential_path(const wcstring &const_path, const wcstring_list_t &direct
/* Don't test the same path multiple times, which can happen if the path is absolute and the CDPATH contains multiple entries */
std::set<wcstring> checked_paths;
/* Keep a cache of which paths / filesystems are case sensitive */
case_sensitivity_cache_t case_sensitivity_cache;
for (size_t wd_idx = 0; wd_idx < directories.size() && ! result; wd_idx++) {
const wcstring &wd = directories.at(wd_idx);
@ -200,12 +225,23 @@ bool is_potential_path(const wcstring &const_path, const wcstring_list_t &direct
// We opened the dir_name; look for a string where the base name prefixes it
wcstring ent;
// Check if we're case insensitive
bool case_insensitive = fs_is_case_insensitive(dir_name, dirfd(dir), case_sensitivity_cache);
// Don't ask for the is_dir value unless we care, because it can cause extra filesystem acces */
bool is_dir = false;
while (wreaddir_resolving(dir, dir_name, ent, require_dir ? &is_dir : NULL))
{
// TODO: support doing the right thing on case-insensitive filesystems like HFS+
if (string_prefixes_string(base_name, ent) && (! require_dir || is_dir))
{
/* Determine which function to call to check for prefixes */
bool (*prefix_func)(const wcstring &, const wcstring &);
if (case_insensitive) {
prefix_func = string_prefixes_string_case_insensitive;
} else {
prefix_func = string_prefixes_string;
}
if (prefix_func(base_name, ent) && (! require_dir || is_dir))
{
result = true;
if (out_path) {
@ -213,10 +249,13 @@ bool is_potential_path(const wcstring &const_path, const wcstring_list_t &direct
out_path->clear();
const wcstring path_base = wdirname(const_path);
if (string_prefixes_string(path_base, const_path)) {
if (prefix_func(path_base, const_path)) {
out_path->append(path_base);
if (! string_suffixes_string(L"/", *out_path))
out_path->push_back(L'/');
printf("path: %ls\n", out_path->c_str());
}
out_path->append(ent);
/* We actually do want a trailing / for directories, since it makes autosuggestion a bit nicer */