forked from lix-project/lix
Merge "Merge pull request #10362 from obsidiansystems/maybeLstat" into main
This commit is contained in:
commit
d106bb553b
|
@ -2044,13 +2044,13 @@ void LocalDerivationGoal::runChild()
|
|||
i.first, i.second.source);
|
||||
|
||||
std::string path = i.first;
|
||||
struct stat st;
|
||||
if (lstat(path.c_str(), &st)) {
|
||||
if (i.second.optional && errno == ENOENT)
|
||||
auto optSt = maybeLstat(path.c_str());
|
||||
if (!optSt) {
|
||||
if (i.second.optional)
|
||||
continue;
|
||||
throw SysError("getting attributes of path '%s", path);
|
||||
throw SysError("getting attributes of required path '%s", path);
|
||||
}
|
||||
if (S_ISDIR(st.st_mode))
|
||||
if (S_ISDIR(optSt->st_mode))
|
||||
sandboxProfile += fmt("\t(subpath \"%s\")\n", path);
|
||||
else
|
||||
sandboxProfile += fmt("\t(literal \"%s\")\n", path);
|
||||
|
@ -2260,14 +2260,12 @@ SingleDrvOutputs LocalDerivationGoal::registerOutputs()
|
|||
continue;
|
||||
}
|
||||
|
||||
struct stat st;
|
||||
if (lstat(actualPath.c_str(), &st) == -1) {
|
||||
if (errno == ENOENT)
|
||||
throw BuildError(
|
||||
"builder for '%s' failed to produce output path for output '%s' at '%s'",
|
||||
worker.store.printStorePath(drvPath), outputName, actualPath);
|
||||
throw SysError("getting attributes of path '%s'", actualPath);
|
||||
}
|
||||
auto optSt = maybeLstat(actualPath.c_str());
|
||||
if (!optSt)
|
||||
throw BuildError(
|
||||
"builder for '%s' failed to produce output path for output '%s' at '%s'",
|
||||
worker.store.printStorePath(drvPath), outputName, actualPath);
|
||||
struct stat & st = *optSt;
|
||||
|
||||
#ifndef __CYGWIN__
|
||||
/* Check that the output is not group or world writable, as
|
||||
|
|
|
@ -63,9 +63,9 @@ static void createLinks(State & state, const Path & srcDir, const Path & dstDir,
|
|||
continue;
|
||||
|
||||
else if (S_ISDIR(srcSt.st_mode)) {
|
||||
struct stat dstSt;
|
||||
auto res = lstat(dstFile.c_str(), &dstSt);
|
||||
if (res == 0) {
|
||||
auto dstStOpt = maybeLstat(dstFile.c_str());
|
||||
if (dstStOpt) {
|
||||
auto & dstSt = *dstStOpt;
|
||||
if (S_ISDIR(dstSt.st_mode)) {
|
||||
createLinks(state, srcFile, dstFile, priority);
|
||||
continue;
|
||||
|
@ -81,14 +81,13 @@ static void createLinks(State & state, const Path & srcDir, const Path & dstDir,
|
|||
createLinks(state, srcFile, dstFile, priority);
|
||||
continue;
|
||||
}
|
||||
} else if (errno != ENOENT)
|
||||
throw SysError("getting status of '%1%'", dstFile);
|
||||
}
|
||||
}
|
||||
|
||||
else {
|
||||
struct stat dstSt;
|
||||
auto res = lstat(dstFile.c_str(), &dstSt);
|
||||
if (res == 0) {
|
||||
auto dstStOpt = maybeLstat(dstFile.c_str());
|
||||
if (dstStOpt) {
|
||||
auto & dstSt = *dstStOpt;
|
||||
if (S_ISLNK(dstSt.st_mode)) {
|
||||
auto prevPriority = state.priorities[dstFile];
|
||||
if (prevPriority == priority)
|
||||
|
@ -103,8 +102,7 @@ static void createLinks(State & state, const Path & srcDir, const Path & dstDir,
|
|||
throw SysError("unlinking '%1%'", dstFile);
|
||||
} else if (S_ISDIR(dstSt.st_mode))
|
||||
throw Error("collision between non-directory '%1%' and directory '%2%'", srcFile, dstFile);
|
||||
} else if (errno != ENOENT)
|
||||
throw SysError("getting status of '%1%'", dstFile);
|
||||
}
|
||||
}
|
||||
|
||||
createSymlink(srcFile, dstFile);
|
||||
|
|
|
@ -256,16 +256,22 @@ struct stat lstat(const Path & path)
|
|||
return st;
|
||||
}
|
||||
|
||||
std::optional<struct stat> maybeLstat(const Path & path)
|
||||
{
|
||||
std::optional<struct stat> st{std::in_place};
|
||||
if (lstat(path.c_str(), &*st))
|
||||
{
|
||||
if (errno == ENOENT || errno == ENOTDIR)
|
||||
st.reset();
|
||||
else
|
||||
throw SysError("getting status of '%s'", path);
|
||||
}
|
||||
return st;
|
||||
}
|
||||
|
||||
bool pathExists(const Path & path)
|
||||
{
|
||||
int res;
|
||||
struct stat st;
|
||||
res = lstat(path.c_str(), &st);
|
||||
if (!res) return true;
|
||||
if (errno != ENOENT && errno != ENOTDIR)
|
||||
throw SysError("getting status of %1%", path);
|
||||
return false;
|
||||
return maybeLstat(path).has_value();
|
||||
}
|
||||
|
||||
bool pathAccessible(const Path & path)
|
||||
|
|
|
@ -114,6 +114,12 @@ bool isDirOrInDir(std::string_view path, std::string_view dir);
|
|||
struct stat stat(const Path & path);
|
||||
struct stat lstat(const Path & path);
|
||||
|
||||
/**
|
||||
* `lstat` the given path if it exists.
|
||||
* @return std::nullopt if the path doesn't exist, or an optional containing the result of `lstat` otherwise
|
||||
*/
|
||||
std::optional<struct stat> maybeLstat(const Path & path);
|
||||
|
||||
/**
|
||||
* @return true iff the given path exists.
|
||||
*/
|
||||
|
|
Loading…
Reference in a new issue