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build: Add a pkg-config writer #253

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37 changes: 14 additions & 23 deletions build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -79,28 +79,19 @@ pub fn build(b: *std.Build) !void {
);

// pkg-config
// FIXME: It is impossible since Zig 0.17 to obtain the
// installation prefix at the configure phase, as that
// is the responsibility of the maker.
// const pc: *Step.InstallFile = pc: {
// const file = b.addWriteFile("libxev.pc", b.fmt(
// \\prefix={s}
// \\includedir=${{prefix}}/include
// \\libdir=${{prefix}}/lib
// \\
// \\Name: libxev
// \\URL: https://github.com/mitchellh/libxev
// \\Description: High-performance, cross-platform event loop
// \\Version: 0.1.0
// \\Cflags: -I${{includedir}}
// \\Libs: -L${{libdir}} -lxev
// , .{b.install_prefix}));
// break :pc b.addInstallFileWithDir(
// file.getDirectory().path(b, "libxev.pc"),
// .prefix,
// "share/pkgconfig/libxev.pc",
// );
// };
const pc: *Step.InstallFile = pc: {
const pc_writer_exe = b.addExecutable(.{
.name = "pc_writer",
.root_module = b.createModule(.{
.root_source_file = b.path("build/write_pkgconfig.zig"),
.target = b.graph.host,
}),
});
const pc_writer_run = b.addRunArtifact(pc_writer_exe);
pc_writer_run.addDirectoryArg(.{ .relative = .{ .base = .deployed_prefix } });
const file = pc_writer_run.captureStdOut(.{});
break :pc b.addInstallFile(file, "share/pkgconfig/libxev.pc");
};

// Man pages
const man = try manPages(b);
Expand Down Expand Up @@ -141,7 +132,7 @@ pub fn build(b: *std.Build) !void {
if (static_lib) |v| b.installArtifact(v);
if (dynamic_lib) |v| b.installArtifact(v);
b.getInstallStep().dependOn(&c_header.step);
// b.getInstallStep().dependOn(&pc.step);
b.getInstallStep().dependOn(&pc.step);
b.installArtifact(test_exe);
if (emit_man) {
for (man) |step| b.getInstallStep().dependOn(step);
Expand Down
27 changes: 27 additions & 0 deletions build/write_pkgconfig.zig
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
const std = @import("std");

pub fn main(init: std.process.Init) !void {
var args_iter = try init.minimal.args.iterateAllocator(init.gpa);
defer args_iter.deinit();
if (!args_iter.skip()) @panic("Called without argv0");
const deployed_prefix = args_iter.next() orelse @panic("Did not get prefix");

var stdout_file = std.Io.File.stdout();
defer stdout_file.close(init.io);
var out_buf: [1024]u8 = undefined;
var stdout = stdout_file.writer(init.io, &out_buf);

try stdout.interface.print(
\\prefix={s}
\\includedir=${{prefix}}/include
\\libdir=${{prefix}}/lib
\\
\\Name: libxev
\\URL: https://github.com/mitchellh/libxev
\\Description: High-performance, cross-platform event loop
\\Version: 0.1.0
\\Cflags: -I${{includedir}}
\\Libs: -L${{libdir}} -lxev
, .{deployed_prefix});
try stdout.interface.flush();
}