mirror of
https://github.com/oven-sh/bun
synced 2026-02-09 18:38:55 +00:00
e75c711c68
* Prepare to upgrade zig
* zig fmt
* AllocGate
* Update data_url.zig
* wip
* few files
* just headers now?
* I think everything works?
* Update mimalloc
* Update hash_map.zig
* Perf improvements to compensate for Allocgate
* Bump
* 📷
* Update bun.lockb
* Less branching
* [js parser] Slightly reduce memory usage
* Update js_parser.zig
* WIP remove unused
* [JS parser] WIP support for `with` keyword
* Remove more dead code
* Fix all the build errors!
* cleanup
* Move `network_thread` up
* Bump peechy
* Update README.md
42 lines
1.9 KiB
Zig
42 lines
1.9 KiB
Zig
const std = @import("std");
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fn isValid(buf: *[std.fs.MAX_PATH_BYTES]u8, segment: []const u8, bin: []const u8) ?u16 {
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std.mem.copy(u8, buf, segment);
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buf[segment.len] = std.fs.path.sep;
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std.mem.copy(u8, buf[segment.len + 1 ..], bin);
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buf[segment.len + 1 + bin.len ..][0] = 0;
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const filepath = buf[0 .. segment.len + 1 + bin.len :0];
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// we cannot use access() here even though all we want to do now here is check it is executable
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// directories can be considered executable
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std.os.accessZ(filepath, std.os.X_OK) catch return null;
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return @intCast(u16, filepath.len);
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}
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// Like /usr/bin/which but without needing to exec a child process
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// Remember to resolve the symlink if necessary
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pub fn which(buf: *[std.fs.MAX_PATH_BYTES]u8, path: []const u8, cwd: []const u8, bin: []const u8) ?[:0]const u8 {
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if (isValid(buf, std.mem.trimRight(u8, cwd, std.fs.path.sep_str), bin)) |len| {
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return buf[0..len :0];
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}
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var path_iter = std.mem.tokenize(u8, path, ":");
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while (path_iter.next()) |segment| {
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if (isValid(buf, segment, bin)) |len| {
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return buf[0..len :0];
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}
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}
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return null;
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}
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test "which" {
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var buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
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var realpath = std.os.getenv("PATH") orelse unreachable;
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var whichbin = which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "which");
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try std.testing.expectEqualStrings(whichbin orelse return std.debug.assert(false), "/usr/bin/which");
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try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "baconnnnnn"));
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try std.testing.expect(null != which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "zig"));
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try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "bin"));
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try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "usr"));
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}
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