54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
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#include "vendor.hpp"
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#include <cruft/util/log.hpp>
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#include <cruft/util/posix/except.hpp>
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#include <cruft/json/tree.hpp>
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#include <wordexp.h>
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namespace fs = std::filesystem;
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///////////////////////////////////////////////////////////////////////////////
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std::vector<cruft::vk::icd::icd_t>
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cruft::vk::icd::enumerate (void)
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{
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// The predefined, ordered, search locations for manifests
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static char const *locations[] = {
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"/usr/local/etc/vulkan/icd.d/",
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"/usr/local/share/vulkan/icd.d/",
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"/etc/vulkan/icd.d/",
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"/usr/share/vulkan/icd.d/",
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"$HOME/.local/share/vulkan/icd.d/",
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};
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std::vector<icd_t> found;
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for (auto const &loc: locations) {
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// We use wordexp rather than std::filesystem because we need to
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// perform environment expansion to account of $HOME in at least one
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// of the paths, so we may as well just use the same approach for
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// everything else too.
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wordexp_t words;
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posix::error::try_call (wordexp, loc, &words, WRDE_NOCMD | WRDE_UNDEF);
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std::unique_ptr<wordexp_t, decltype(&wordfree)> cleanup {&words, &wordfree};
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// Just try to parse everything we can find in the directory (if it
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// happens to exist) and fail out if it doesn't work. Marginally safer
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// than doing various tests.
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for (size_t i = 0; i < words.we_wordc; ++i) {
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try {
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for (auto const &path: fs::directory_iterator (words.we_wordv[i])) {
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found.push_back (from_json<icd_t> (*json::tree::parse (path)));
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}
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} catch (std::exception const &e) {
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LOG_INFO("failed to parse icd manifest; %!", e.what ());
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}
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}
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}
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return found;
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}
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