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const std = @import("std");
const Context = @import("main.zig").Context;
const fs = @import("fs.zig");
const log = std.log.scoped(.exe);
pub fn runPandoc(ctx: *Context) !void {
ctx.progress_start("Processing markdown files");
defer ctx.progress_end();
var pool: std.Thread.Pool = undefined;
try pool.init(.{
.n_jobs = (try std.Thread.getCpuCount()) - 1,
.allocator = ctx.allocator(),
});
defer pool.deinit();
for (ctx.markdown.items) |*page| {
// the inline struct trick is a workardoun for Thread.Pool::spawn not
// accepting functions that can error:
// https://github.com/ziglang/zig/issues/18810
try pool.spawn(struct {
fn worker(worker_ctx: *Context, worker_page: *const []const u8) void {
pandocWorker(worker_ctx, worker_page.*) catch |err| std.log.err("pandoc worker failed with: {}", .{err});
}
}.worker, .{ ctx, page });
}
log.info("Processed {d} markdown files.", .{ctx.markdown.items.len});
}
fn pandocWorker(ctx: *Context, page: []const u8) !void {
const source_path = try std.fs.path.join(ctx.allocator(), &.{ Context.params.PAGE_PATH, page });
defer ctx.allocator().free(source_path);
const target_path = try fs.replaceExtension(ctx.allocator(), source_path, "htm");
defer ctx.allocator().free(target_path);
// get mtime of the source document
const mtime = try (fs.getGitTime(source_path) catch fs.getMtime(source_path));
const mtime_str = try fs.formatTimespec(ctx.allocator(), mtime, "%s");
defer ctx.allocator().free(mtime_str);
const f = try fs.FileSwapper.createAt(ctx.allocator(), target_path);
defer f.close();
// open new scope to close the file swapper when we're done writing
try f.writer().print(
\\<!-- Generated file, you may edit and discard {s} :) -->
\\
,
.{page},
);
// make pandoc runs reproducable
var env_map = std.process.EnvMap.init(ctx.allocator());
defer env_map.deinit();
try env_map.put("SOURCE_DATE_EPOCH", mtime_str);
try captureStdout(ctx, &.{
Context.params.PANDOC,
"--from",
"markdown+wikilinks_title_after_pipe+autolink_bare_uris",
"--to",
"html5",
"--lua-filter",
// TODO: embed the preproc filter
Context.params.PANDOC_PREPROC,
"--strip-comments",
"--output=-",
source_path,
}, &env_map, f.writer().any());
// swap now, we want to edit mtime
try f.swap();
// fixup mtime of the resulting file, this has to happen after the file
// swapper has been closed, because it works on a tmp file which is going
// to be renamed (meaning mtime is changed again)
try fs.setMtime(target_path, mtime);
}
pub fn captureStdout(ctx: *Context, argv: []const []const u8, env_map: ?*std.process.EnvMap, buf: std.io.AnyWriter) !void {
const command = try std.mem.join(ctx.allocator(), " ", argv);
defer ctx.allocator().free(command);
const label = try std.fmt.allocPrint(ctx.allocator(), "running {s}", .{command});
defer ctx.allocator().free(label);
ctx.progress_start(label);
defer ctx.progress_end();
var p = std.process.Child.init(argv, std.heap.page_allocator);
p.stdout_behavior = .Pipe;
p.progress_node = ctx.progress_nodes.getLast();
p.env_map = env_map;
try p.spawn();
try buf.writeFile(p.stdout.?);
const result = try p.wait();
_ = result;
}
pub fn shell(ctx: *Context, command: []const u8) !void {
const label = try std.fmt.allocPrint(ctx.allocator(), "running {s}", .{command});
defer ctx.allocator().free(label);
ctx.progress_start(label);
defer ctx.progress_end();
var p = std.process.Child.init(&.{
"sh",
"-c",
command,
}, std.heap.page_allocator);
p.progress_node = ctx.progress_nodes.getLast();
try p.spawn();
const result = try p.wait();
_ = result;
}
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