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Factor out lookupExecutable and other PATH improvments

Browse source 
This ended up motivating a good deal of other infra improvements in
order to get Windows right:

- `OsString` to complement `std::filesystem::path`

- env var code for working with the underlying `OsString`s

- Rename `PATHNG_LITERAL` to `OS_STR`

- `NativePathTrait` renamed to `OsPathTrait`, given a character template
  parameter until #9205 is complete.

Split `tests.cc` matching split of `util.{cc,hh}` last year.

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
This commit is contained in:
John Ericson 2024-08-05 12:05:29 -04:00
parent 0836888002
commit 6c861b9c51
32 changed files with 616 additions and 97 deletions
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23
src/libutil/file-system.cc
View file

@ -92,7 +92,7 @@ Path canonPath(PathView path, bool resolveSymlinks)
arbitrary (but high) limit to prevent infinite loops. */
unsigned int followCount = 0, maxFollow = 1024;
auto ret = canonPathInner<NativePathTrait>(
auto ret = canonPathInner<OsPathTrait<char>>(
path,
[&followCount, &temp, maxFollow, resolveSymlinks]
(std::string & result, std::string_view & remaining) {
@ -122,7 +122,7 @@ Path canonPath(PathView path, bool resolveSymlinks)
Path dirOf(const PathView path)
{
Path::size_type pos = NativePathTrait::rfindPathSep(path);
Path::size_type pos = OsPathTrait<char>::rfindPathSep(path);
if (pos == path.npos)
return ".";
return fs::path{path}.parent_path().string();
@ -135,10 +135,10 @@ std::string_view baseNameOf(std::string_view path)
return "";
auto last = path.size() - 1;
while (last > 0 && NativePathTrait::isPathSep(path[last]))
while (last > 0 && OsPathTrait<char>::isPathSep(path[last]))
last -= 1;
auto pos = NativePathTrait::rfindPathSep(path, last);
auto pos = OsPathTrait<char>::rfindPathSep(path, last);
if (pos == path.npos)
pos = 0;
else
@ -569,7 +569,7 @@ void replaceSymlink(const Path & target, const Path & link)
}
void setWriteTime(
const std::filesystem::path & path,
const fs::path & path,
time_t accessedTime,
time_t modificationTime,
std::optional<bool> optIsSymlink)
@ -685,4 +685,17 @@ void moveFile(const Path & oldName, const Path & newName)
//////////////////////////////////////////////////////////////////////
bool isExecutableFileAmbient(const fs::path & exe) {
// Check file type, because directory being executable means
// something completely different.
return std::filesystem::is_regular_file(exe)
&& access(exe.string().c_str(),
#ifdef WIN32
0 // TODO do better
#else
X_OK
#endif
) == 0;
}
}