#include "build_db.h"
#include "util.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <errno.h>

#define PKG_BUILD_CMD "./scripts/run_pkg_build.sh"

void package_run_build(const package_info_t* info) {

	// PIPE and FORK to run install script
    int pipefds[2] = {0};
    if (pipe(pipefds) < 0) die("failed to pipe: %s", strerror(errno));
    pid_t pid = fork();
    if (pid < 0) die("failed to fork: %s", strerror(errno));

    if (pid == 0) {
		// child proc
		// connect my stdout and stderr to the pipe
        close(pipefds[0]);
        dup2(pipefds[1], STDOUT_FILENO);
        dup2(pipefds[1], STDERR_FILENO);
        close(pipefds[1]);
		// exec into install script
        char* argv[] = { PKG_BUILD_CMD, info->script_path, NULL };
        char* envp[] = { NULL };
        execve(PKG_BUILD_CMD, argv, envp);
		// what are you still doing here?
		die("CHILD - execve to %s failed: %s", PKG_BUILD_CMD, strerror(errno));
    } else {
		// parent proc, close write end of pipe
		close(pipefds[1]);
	}

	// read from the pipe until EOF
	char buf[4096];
	ssize_t bytes_read = 0;
    while ((bytes_read = read(pipefds[0], buf, sizeof(buf))) > 0) {
		// print build out, can log and stuff in future
		printf("%.*s", (int)bytes_read, buf);
	}
    if (bytes_read < 0) die("failed to read from pipe: %s", strerror(errno));
	close(pipefds[0]);

	// reap the child to finish
    int wstatus;
    if (waitpid(pid, &wstatus, 0) < 0) die("waitpid failed: %s", strerror(errno));
	if (WEXITSTATUS(wstatus) != 0) die("the child failed to execute install script");
}