aboutsummaryrefslogtreecommitdiff
path: root/src/which.zig
blob: 8c29e7e4a093c1b7cd06ce32c2a5f6420f20c90a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
const std = @import("std");
const bun = @import("root").bun;
fn isValid(buf: *[bun.MAX_PATH_BYTES]u8, segment: []const u8, bin: []const u8) ?u16 {
    bun.copy(u8, buf, segment);
    buf[segment.len] = std.fs.path.sep;
    bun.copy(u8, buf[segment.len + 1 ..], bin);
    buf[segment.len + 1 + bin.len ..][0] = 0;
    const filepath = buf[0 .. segment.len + 1 + bin.len :0];
    if (!checkPath(filepath)) return null;
    return @intCast(u16, filepath.len);
}

extern "C" fn is_executable_file(path: [*:0]const u8) bool;
fn checkPath(filepath: [:0]const u8) bool {
    bun.JSC.markBinding(@src());
    return is_executable_file(filepath);
}

// Like /usr/bin/which but without needing to exec a child process
// Remember to resolve the symlink if necessary
pub fn which(buf: *[bun.MAX_PATH_BYTES]u8, path: []const u8, cwd: []const u8, bin: []const u8) ?[:0]const u8 {
    if (bin.len == 0) return null;

    // handle absolute paths
    if (std.fs.path.isAbsolute(bin)) {
        bun.copy(u8, buf, bin);
        buf[bin.len] = 0;
        var binZ: [:0]u8 = buf[0..bin.len :0];
        if (checkPath(binZ)) return binZ;

        // note that directories are often executable
        // TODO: should we return null here? What about the case where ytou have
        //   /foo/bar/baz as a path and you're in /home/jarred?
    }

    if (cwd.len > 0) {
        if (isValid(buf, std.mem.trimRight(u8, cwd, std.fs.path.sep_str), bin)) |len| {
            return buf[0..len :0];
        }
    }

    var path_iter = std.mem.tokenize(u8, path, ":");
    while (path_iter.next()) |segment| {
        if (isValid(buf, segment, bin)) |len| {
            return buf[0..len :0];
        }
    }

    return null;
}

test "which" {
    var buf: [bun.MAX_PATH_BYTES]u8 = undefined;
    var realpath = bun.getenvZ("PATH") orelse unreachable;
    var whichbin = which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "which");
    try std.testing.expectEqualStrings(whichbin orelse return std.debug.assert(false), "/usr/bin/which");
    try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "baconnnnnn"));
    try std.testing.expect(null != which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "zig"));
    try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "bin"));
    try std.testing.expect(null == which(&buf, realpath, try std.process.getCwdAlloc(std.heap.c_allocator), "usr"));
}
e='ts-in-hoisted-script'>ts-in-hoisted-script Unnamed repository; edit this file 'description' to name the repository.
aboutsummaryrefslogtreecommitdiff
path: root/docs/src/pages/guides/pagination.md (unfollow)
AgeCommit message (Expand)AuthorFilesLines
2021-09-15Expose slots to components (#1368)Gravatar Jonathan Neal 10-0/+169
2021-09-15[ci] collect statsGravatar FredKSchott 1-0/+1
2021-09-14Revert "fix bad ci paths"Gravatar Fred K. Schott 1-5/+5
2021-09-15[ci] yarn formatGravatar FredKSchott 1-0/+1
2021-09-14Version Packages (#1358)astro@0.20.6@astrojs/renderer-vue@0.1.8@astrojs/renderer-svelte@0.1.2@astrojs/renderer-solid@0.1.1@astrojs/renderer-react@0.2.1@astrojs/renderer-preact@0.2.2@astrojs/renderer-lit@0.1.1Gravatar github-actions[bot] 41-70/+91
2021-09-14fix bad ci pathsGravatar Fred K. Schott 1-5/+5
2021-09-14update changesetsGravatar Fred K. Schott 1-1/+1
2021-09-14Fix passing Markdown content through props (#1259) (#1343)Gravatar kelvinsjk 4-0/+22
2021-09-14Improve stats logging to use `pretty-bytes` so that 20B doesn't get output as...Gravatar Caleb Jasik 4-2/+13
2021-09-14[ci] yarn formatGravatar FredKSchott 1-1/+1
2021-09-14Merge "Remove check for referenced files" (#1196)Gravatar (none) 6-6/+45
2021-09-14Docs: Add READMEs for renderers (#1351)Gravatar Drew Powers 8-1/+184
2021-09-14Update deployment docs for Netlify deployment (#1361)Gravatar Cassidy Williams 1-7/+9
2021-09-14Delete perfect-kids-occur.md (#1372)Gravatar Fred K. Schott 1-5/+0
2021-09-14[ci] yarn formatGravatar FredKSchott 1-15/+10
2021-09-14Self-host homepage fonts to improve page load speed (#1370)Gravatar mundry 14-5/+52
2021-09-14Add types to examples and docs (#1347)Gravatar Matthew Phillips 8-20/+60
2021-09-14[ci] collect statsGravatar FredKSchott 1-0/+1
2021-09-13Fix typo (#1360)Gravatar Marcus Otterström 1-1/+1
2021-09-13Disclaimer for Github pages / jekyll quirk (#1355)Gravatar Tc001 2-0/+7
2021-09-13fix outdated lockfile issue (#1357)Gravatar Fred K. Schott 1-3/+1
2021-09-13Add `astro.build/play` link (#1359)Gravatar Nate Moore 1-0/+6
2021-09-13[ci] yarn formatGravatar FredKSchott 2-8/+7
2021-09-13Add a new lockfile (#1356)Gravatar Matthew Phillips 1-19/+19
2021-09-13[ci] collect statsGravatar FredKSchott 1-0/+1
2021-09-12[ci] collect statsGravatar FredKSchott 1-0/+1
2021-09-11[ci] collect statsGravatar FredKSchott 1-0/+1
2021-09-10Prevent removing CSS preloads during bundling (#1326)Gravatar Bartek Igielski 8-18/+96
2021-09-10Fix typos in Netlify sponsorship announcement blog post (#1346)Gravatar mundry 1-4/+4
2021-09-10[ci] collect statsGravatar FredKSchott 2-1/+2
2021-09-09blog: announce netlify sponsorship (#1345)Gravatar Fred K. Schott 4-5/+64
2021-09-09Version Packages (#1344)Gravatar github-actions[bot] 29-53/+42
2021-09-09Revert "Version Packages (#1303)"Gravatar Fred K. Schott 29-42/+53
2021-09-09update lockfileastro@0.20.5@astrojs/markdown-support@0.3.1Gravatar Fred K. Schott 1-9/+9
2021-09-09Version Packages (#1303)Gravatar github-actions[bot] 29-53/+42
2021-09-09[ci] collect statsGravatar FredKSchott 2-1/+2
2021-09-08Update netlify deploy instructions for `.nvmrc` syntax (#1337)Gravatar Caleb Jasik 1-1/+1
2021-09-08[ci] yarn formatGravatar jasikpark 1-1/+0