/*      $OpenBSD: mkmakefile.c,v 1.49 2025/06/13 12:46:41 tb Exp $      */
/*      $NetBSD: mkmakefile.c,v 1.34 1997/02/02 21:12:36 thorpej Exp $  */

/*
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Lawrence Berkeley Laboratories.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      from: @(#)mkmakefile.c  8.1 (Berkeley) 6/6/93
 */

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "config.h"
#include "sem.h"

/*
 * Make the Makefile.
 */

static const char *srcpath(struct files *);

static int emitdefs(FILE *);
static int emitreconfig(FILE *);
static int emitfiles(FILE *, int);

static int emitobjs(FILE *);
static int emitcfiles(FILE *);
static int emitsfiles(FILE *);
static int emitrules(FILE *);
static int emitload(FILE *);

int
mkmakefile(void)
{
        FILE *ifp, *ofp;
        int lineno;
        int (*fn)(FILE *);
        char *ifname;
        char line[BUFSIZ], buf[200];

        (void)snprintf(buf, sizeof buf, "arch/%s/conf/Makefile.%s",
            machine, machine);
        ifname = sourcepath(buf);
        if ((ifp = fopen(ifname, "r")) == NULL) {
                warn("cannot read %s", ifname);
                free(ifname);
                return (1);
        }
        if ((ofp = fopen("Makefile", "w")) == NULL) {
                warn("cannot write Makefile");
                free(ifname);
                (void)fclose(ifp);
                return (1);
        }
        if (emitdefs(ofp) != 0)
                goto wrerror;
        lineno = 0;
        while (fgets(line, sizeof(line), ifp) != NULL) {
                lineno++;
                if (line[0] != '%') {
                        if (fputs(line, ofp) == EOF)
                                goto wrerror;
                        continue;
                }
                if (strcmp(line, "%OBJS\n") == 0)
                        fn = emitobjs;
                else if (strcmp(line, "%CFILES\n") == 0)
                        fn = emitcfiles;
                else if (strcmp(line, "%SFILES\n") == 0)
                        fn = emitsfiles;
                else if (strcmp(line, "%RULES\n") == 0)
                        fn = emitrules;
                else if (strcmp(line, "%LOAD\n") == 0)
                        fn = emitload;
                else {
                        xerror(ifname, lineno,
                            "unknown %% construct ignored: %s", line);
                        continue;
                }
                if ((*fn)(ofp))
                        goto wrerror;
        }
        if (startdir != NULL) {
                if (emitreconfig(ofp) != 0)
                        goto wrerror;
        }
        if (ferror(ifp)) {
                warn("error reading %s (at line %d)", ifname, lineno);
                goto bad;
        }
        if (fclose(ofp) == EOF) {
                ofp = NULL;
                goto wrerror;
        }
        (void)fclose(ifp);
        free(ifname);
        return (0);
wrerror:
        warn("error writing Makefile");
bad:
        if (ofp != NULL)
                (void)fclose(ofp);
        /* (void)unlink("Makefile"); */
        free(ifname);
        return (1);
}

char *
expandname(const char *_nam)
{
        char *ret = NULL, *nam, *n, *s, *e, *expand;
        const char *var = NULL;

        if ((nam = n = strdup(_nam)) == NULL)
                errx(1, "out of memory");

        while (*n) {
                /* Search for a ${name} to expand */
                if ((s = strchr(n, '$')) == NULL) {
                        if (ret == NULL)
                                break;
                        if (asprintf(&expand, "%s%s", ret, n) == -1)
                                errx(1, "out of memory");
                        free(ret);
                        ret = expand;
                        break;
                }
                *s++ = '\0';
                if (*s != '{')
                        error("{");
                e = strchr(++s, '}');
                if (!e)
                        error("}");
                *e = '\0';

                if (strcmp(s, "MACHINE_ARCH") == 0)
                        var = machinearch ? machinearch : machine;
                else if (strcmp(s, "MACHINE") == 0)
                        var = machine;
                else
                        error("variable `%s' not supported", s);

                if (asprintf(&expand, "%s%s", ret ? ret : nam, var) == -1)
                        errx(1, "out of memory");
                free(ret);
                ret = expand;
                n = e + 1;
        }
        free(nam);
        return (ret);
}

/*
 * Return (possibly in a static buffer) the name of the `source' for a
 * file.  If we have `options source', or if the file is marked `always
 * source', this is always the path from the `file' line; otherwise we
 * get the .o from the obj-directory.
 */
static const char *
srcpath(struct files *fi)
{
        /* Always have source, don't support object dirs for kernel builds. */
        struct nvlist *nv, *nv1;
        char *expand, *source;

        /* Search path list for files we will want to use */
        if (fi->fi_nvpath->nv_next == NULL) {
                nv = fi->fi_nvpath;
                goto onlyone;
        }

        for (nv = fi->fi_nvpath; nv; nv = nv->nv_next) {
                expand = expandname(nv->nv_name);
                source = sourcepath(expand ? expand : nv->nv_name);
                if (access(source, R_OK) == 0) {
                        if (expand)
                                nv->nv_name = intern(expand);
                        break;
                }
                free(expand);
                free(source);
        }
        if (nv == NULL)
                nv = fi->fi_nvpath;

        /*
         * Now that we know which path is selected, delete all the
         * other paths to skip the access() checks next time.
         */
        while ((nv1 = fi->fi_nvpath)) {
                nv1 = nv1->nv_next;
                if (fi->fi_nvpath != nv)
                        nvfree(fi->fi_nvpath);
                fi->fi_nvpath = nv1;
        }
        fi->fi_nvpath = nv;
        nv->nv_next = NULL;
onlyone:
        return (nv->nv_name);
}

static int
emitdefs(FILE *fp)
{
        struct nvlist *nv;
        char *sp;

        if (fputs("IDENT=", fp) == EOF)
                return (1);
        sp = "";
        for (nv = options; nv != NULL; nv = nv->nv_next) {
                if (ht_lookup(defopttab, nv->nv_name) != NULL)
                        continue;
                if (fprintf(fp, "%s-D%s", sp, nv->nv_name) < 0)
                    return 1;
                if (nv->nv_str)
                    if (fprintf(fp, "=\"%s\"", nv->nv_str) < 0)
                        return 1;
                sp = " ";
        }
        if (putc('\n', fp) == EOF)
                return (1);
        if (fprintf(fp, "PARAM=-DMAXUSERS=%d\n", maxusers) < 0)
                return (1);
        if (fprintf(fp, "S=\t%s\n", srcdir) < 0)
                return (1);
        if (fprintf(fp, "_mach=%s\n", machine) < 0)
                return (1);
        if (fprintf(fp, "_arch=%s\n", machinearch ? machinearch : machine) < 0)
                return (1);
        for (nv = mkoptions; nv != NULL; nv = nv->nv_next)
                if (fprintf(fp, "%s=%s\n", nv->nv_name, nv->nv_str) < 0)
                        return (1);
        return (0);
}

static int
emitreconfig(FILE *fp)
{
        if (fputs("\n"
            ".PHONY: config\n"
            "config:\n", fp) == EOF)
                return (1);
        if (fprintf(fp, "\tcd %s && config ", startdir) < 0)
                return (1);
        if (pflag) {
                if (fputs("-p ", fp) == EOF)
                        return (1);
        }
        if (sflag) {
                if (fprintf(fp, "-s %s ", sflag) < 0)
                        return (1);
        }
        if (bflag) {
                if (fprintf(fp, "-b %s ", bflag) < 0)
                        return (1);
        }
        /* other options */
        if (fprintf(fp, "%s\n", conffile) < 0)
                return (1);
        return (0);
}

static int
emitobjs(FILE *fp)
{
        struct files *fi;
        struct objects *oi;
        int lpos, len, sp;
        const char *fpath;

        if (fputs("OBJS=", fp) == EOF)
                return (1);
        sp = '\t';
        lpos = 7;
        for (fi = allfiles; fi != NULL; fi = fi->fi_next) {
                if ((fi->fi_flags & FI_SEL) == 0)
                        continue;
                if ((fpath = srcpath(fi)) == NULL)
                        return (1);
                len = strlen(fi->fi_base) + 3;
                if (lpos + len > 72) {
                        if (fputs(" \\\n", fp) == EOF)
                                return (1);
                        sp = '\t';
                        lpos = 7;
                }
                if (fprintf(fp, "%c%s.o", sp, fi->fi_base) < 0)
                        return (1);
                lpos += len + 1;
                sp = ' ';
        }
        for (oi = allobjects; oi != NULL; oi = oi->oi_next) {
                if ((oi->oi_flags & OI_SEL) == 0)
                        continue;
                len = strlen(oi->oi_path) + 3;
                if (lpos + len > 72) {
                        if (fputs(" \\\n", fp) == EOF)
                                return (1);
                        sp = '\t';
                        lpos = 7;
                }
                if (fprintf(fp, "%c$S/%s", sp, oi->oi_path) < 0)
                        return (1);
                lpos += len + 1;
                sp = ' ';
        }
        if (putc('\n', fp) == EOF)
                return (1);
        return (0);
}

static int
emitcfiles(FILE *fp)
{

        return (emitfiles(fp, 'c'));
}

static int
emitsfiles(FILE *fp)
{

        return (emitfiles(fp, 's'));
}

static int
emitfiles(FILE *fp, int suffix)
{
        struct files *fi;
        int lpos, len, sp;
        const char *fpath;
        char uppersuffix = toupper((unsigned char)suffix);

        if (fprintf(fp, "%cFILES=", uppersuffix) < 0)
                return (1);
        sp = '\t';
        lpos = 7;
        for (fi = allfiles; fi != NULL; fi = fi->fi_next) {
                if ((fi->fi_flags & FI_SEL) == 0)
                        continue;
                if ((fpath = srcpath(fi)) == NULL)
                        return (1);
                len = strlen(fpath);
                if (fpath[len - 1] != suffix && fpath[len - 1] != uppersuffix)
                        continue;
                if (*fpath != '/')
                        len += 3;       /* "$S/" */
                if (lpos + len > 72) {
                        if (fputs(" \\\n", fp) == EOF)
                                return (1);
                        sp = '\t';
                        lpos = 7;
                }
                if (fprintf(fp, "%c%s%s", sp, *fpath != '/' ? "$S/" : "",
                    fpath) < 0)
                        return (1);
                lpos += len + 1;
                sp = ' ';
        }
        if (putc('\n', fp) == EOF)
                return (1);
        return (0);
}

/*
 * Emit the make-rules.
 */
static int
emit_1rule(FILE *fp, struct files *fi, const char *fpath, const char *suffix)
{
        if (fprintf(fp, "%s%s: %s%s\n", fi->fi_base, suffix,
            *fpath != '/' ? "$S/" : "", fpath) < 0)
                return (1);
        if (fi->fi_mkrule != NULL) {
                if (fprintf(fp, "\t%s\n\n", fi->fi_mkrule) < 0)
                        return (1);
        }
        return (0);
}

static int
emitrules(FILE *fp)
{
        struct files *fi;
        const char *fpath;

        /* write suffixes */
        if (fprintf(fp,
            ".SUFFIXES:\n"
            ".SUFFIXES: .s .S .c .o\n\n"

            ".PHONY: depend all install clean tags newbsd update-link\n\n"

            ".c.o:\n"
            "\t${NORMAL_C}\n\n"

            ".s.o:\n"
            "\t${NORMAL_S}\n\n"

            ".S.o:\n"
            "\t${NORMAL_S}\n\n") < 0)
                return (1);


        for (fi = allfiles; fi != NULL; fi = fi->fi_next) {
                if ((fi->fi_flags & FI_SEL) == 0)
                        continue;
                if ((fpath = srcpath(fi)) == NULL)
                        return (1);
                /* special rule: need to emit them independently */
                if (fi->fi_mkrule) {
                        if (emit_1rule(fp, fi, fpath, ".o"))
                                return (1);
                /* simple default rule */
                } else {
                        if (fprintf(fp, "%s.o: %s%s\n", fi->fi_base,
                            *fpath != '/' ? "$S/" : "", fpath) < 0)
                                return (1);
                }

        }
        return (0);
}

/*
 * Emit the load commands.
 *
 * This function is not to be called `spurt'.
 */
static int
emitload(FILE *fp)
{
        struct config *cf;
        const char *nm, *swname;
        int first;

        if (fputs("all:", fp) == EOF)
                return (1);
        for (cf = allcf; cf != NULL; cf = cf->cf_next) {
                if (fprintf(fp, " %s", cf->cf_name) < 0)
                        return (1);
        }
        if (fputs("\n\n", fp) == EOF)
                return (1);
        for (first = 1, cf = allcf; cf != NULL; cf = cf->cf_next) {
                nm = cf->cf_name;
                swname =
                    cf->cf_root != NULL ? cf->cf_name : "generic";
                if (fprintf(fp, "%s: ${SYSTEM_DEP} swap%s.o", nm, swname) < 0)
                        return (1);
                if (first) {
                        if (fputs(" vers.o", fp) == EOF)
                                return (1);
                        first = 0;
                }
                if (fprintf(fp, "\n"
                    "\t${SYSTEM_LD_HEAD}\n"
                    "\t${SYSTEM_LD} swap%s.o\n"
                    "\t${SYSTEM_LD_TAIL}\n"
                    "\n"
                    "swap%s.o: ", swname, swname) < 0)
                        return (1);
                if (cf->cf_root != NULL) {
                        if (fprintf(fp, "swap%s.c\n", nm) < 0)
                                return (1);
                } else {
                        if (fprintf(fp, "$S/conf/swapgeneric.c\n") < 0)
                                return (1);
                }
                if (fputs("\t${NORMAL_C}\n\n", fp) == EOF)
                        return (1);

                if (fprintf(fp, "new%s:\n", nm) < 0)
                        return (1);
                if (fprintf(fp,
                    "\t${MAKE_GAP}\n"
                    "\t${SYSTEM_LD_HEAD}\n"
                    "\t${SYSTEM_LD} swap%s.o\n"
                    "\t${SYSTEM_LD_TAIL}\n"
                    "\trm -f new%s.gdb\n"
                    "\tmv -f new%s %s\n\n",
                    swname, nm, nm, nm) < 0)
                        return (1);

                if (fprintf(fp, "update-link:\n") < 0)
                        return (1);
                if (fprintf(fp,
                    "\tmkdir -p -m 700 /usr/share/relink/kernel\n"
                    "\trm -rf /usr/share/relink/kernel/%s /usr/share/relink/kernel.tgz\n"
                    "\tmkdir /usr/share/relink/kernel/%s\n"
                    "\ttar -chf - Makefile makegap.sh ld.script *.o | \\\n"
                    "\t    tar -C /usr/share/relink/kernel/%s -xf -\n\n",
                    last_component, last_component, last_component) < 0)
                        return (1);
        }
        return (0);
}