Can't use Frankenphp as a golang library

[hookenz]

What happened?

I grabbed an example of using Franken as a go library

package main

import (
	"log"
	"net/http"

	"github.com/dunglas/frankenphp"
)

func main() {
	if err := frankenphp.Init(); err != nil {
		panic(err)
	}
	defer frankenphp.Shutdown()

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		req, err := frankenphp.NewRequestWithContext(r, frankenphp.WithRequestDocumentRoot("/var/www/html", false))
		if err != nil {
			panic(err)
		}

		if err := frankenphp.ServeHTTP(w, req); err != nil {
			panic(err)
		}
	})
	log.Fatal(http.ListenAndServe(":8080", nil))

> go mod init example
> go mod tidy
...

❯ go build .
# github.com/dunglas/frankenphp/internal/watcher
watcher.c:5:10: fatal error: wtr/watcher-c.h: No such file or directory
    5 | #include "wtr/watcher-c.h"
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.

I thought perhaps watcher-c.h is in the php code? but I can't locate it. Where does that file come from?

Build Type

Custom (tell us more in the description)

Worker Mode

Yes

Operating System

GNU/Linux

CPU Architecture

x86_64

PHP configuration

See above

Relevant log output

As above

[hookenz]

Ok I seems I need to install watcher.

Why I went wrong here is because the documentation says
Install "Optional" Dependencies.

Since the title says "Optional". I skipped it. But it's not optional unless you turn those features off in the configure step I think? That's unclear. I suggest you amend the documentation.

Unfortunately, watcher has really bad documentation on how to actually install it and make it available.
According to the watcher docs, I followed the steps and watcher is still not found. And it's been way too many years that I have forgotten how the C compiler finds files. From memory, INCLUDE environment vars or something. But there simply are no examples to get this off the ground with golang. It's a horrible onboarding experience.

Looks like I can copy the watcher includes to:
sudo cp -rp watcher-next/include/wtr /usr/local/include/

So this problem is resolved but now I get

❯ go build .
# github.com/dunglas/frankenphp
../go/pkg/mod/github.com/dunglas/[email protected]/cgi.go:3:11: fatal error: php_variables.h: No such file or directory
    3 | // #include <php_variables.h>
      |           ^~~~~~~~~~~~~~~~~
compilation terminated.

Next battle. That's a file in the php sources. Yeah, please provide more thorough examples from start to finish. Nothing quite works out of the gate.

[AlliBalliBaba]

To build without the watcher you can do something like this in the meantime I think:

go build -tags nowatcher

[hookenz]

I got a little further.

❯ CGO_CFLAGS="-I/home/hookenz/franken/php-8.2.25/main -I/home/hookenz/franken/php-8.2.25/Zend -I/home/hookenz/franken/php-8.2.25 -I /home/hookenz/franken/php-8.2.25/TSRM" go build .
# frank
/snap/go/10743/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/bin/gcc -m64 -o $WORK/b001/exe/a.out -Wl,--export-dynamic-symbol=_cgo_panic -Wl,--export-dynamic-symbol=_cgo_topofstack -Wl,--export-dynamic-symbol=crosscall2 -Wl,--export-dynamic-symbol=go_apache_request_headers -Wl,--export-dynamic-symbol=go_frankenphp_finish_request -Wl,--export-dynamic-symbol=go_frankenphp_release_known_variable_keys -Wl,--export-dynamic-symbol=go_frankenphp_worker_handle_request_start -Wl,--export-dynamic-symbol=go_getenv -Wl,--export-dynamic-symbol=go_getfullenv -Wl,--export-dynamic-symbol=go_handle_file_watcher_event -Wl,--export-dynamic-symbol=go_handle_request -Wl,--export-dynamic-symbol=go_log -Wl,--export-dynamic-symbol=go_putenv -Wl,--export-dynamic-symbol=go_read_cookies -Wl,--export-dynamic-symbol=go_read_post -Wl,--export-dynamic-symbol=go_register_variables -Wl,--export-dynamic-symbol=go_sapi_flush -Wl,--export-dynamic-symbol=go_sapi_getenv -Wl,--export-dynamic-symbol=go_shutdown -Wl,--export-dynamic-symbol=go_ub_write -Wl,--export-dynamic-symbol=go_write_headers -Wl,--compress-debug-sections=zlib /tmp/go-link-124271613/go.o /tmp/go-link-124271613/000000.o /tmp/go-link-124271613/000001.o /tmp/go-link-124271613/000002.o /tmp/go-link-124271613/000003.o /tmp/go-link-124271613/000004.o /tmp/go-link-124271613/000005.o /tmp/go-link-124271613/000006.o /tmp/go-link-124271613/000007.o /tmp/go-link-124271613/000008.o /tmp/go-link-124271613/000009.o /tmp/go-link-124271613/000010.o /tmp/go-link-124271613/000011.o /tmp/go-link-124271613/000012.o /tmp/go-link-124271613/000013.o /tmp/go-link-124271613/000014.o /tmp/go-link-124271613/000015.o /tmp/go-link-124271613/000016.o /tmp/go-link-124271613/000017.o /tmp/go-link-124271613/000018.o /tmp/go-link-124271613/000019.o /tmp/go-link-124271613/000020.o /tmp/go-link-124271613/000021.o /tmp/go-link-124271613/000022.o /tmp/go-link-124271613/000023.o /tmp/go-link-124271613/000024.o /tmp/go-link-124271613/000025.o /tmp/go-link-124271613/000026.o /tmp/go-link-124271613/000027.o /tmp/go-link-124271613/000028.o /tmp/go-link-124271613/000029.o /tmp/go-link-124271613/000030.o /tmp/go-link-124271613/000031.o -O2 -g -lresolv -L/usr/local/lib -L/usr/lib -lphp -ldl -lm -lutil -O2 -g -lresolv -O2 -g -lpthread -O2 -g -lwatcher-c -lstdc++ -O2 -g -no-pie
/usr/bin/ld: cannot find -lphp: No such file or directory
collect2: error: ld returned 1 exit status

[hookenz]

Ok, I've solved it. I need to "install" the PHP binary and all it's development files with.

So after the ./configure step.

sudo make install.

Then simply run go build .

I also needed to copy the watcher
sudo cp -rp watcher-next/include/wtr /usr/local/include/

It would be awesome if the docs could be updated with more full and clear examples. But I think I got there in the end.

[dunglas]

Don't hesitate to send docs PR, improving this is on my (long) todo list, but any help is welcome.

[withinboredom]

Ok, I've solved it. I need to "install" the PHP binary and all it's development files with.

Don't forget it needs to be a ZTS build @hookenz!