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eolian gen: add generation of build dependencies 

It is now possible to generate a separate .d file which will
contain Make-style dependencies for the files generated in that
batch, i.e. if you geerate header, legacy header and source, the
.eo.d file will contain dependency lists for those three.

It should be possible to integrate this into our build system to
enable proper regeneration of .eo files in an incremental manner.

Fixes T2251.
This commit is contained in:
Daniel Kolesa 2018-10-11 16:36:50 +02:00
parent c4640d6f40
commit d82deea833
1 changed files with 70 additions and 4 deletions
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74
src/bin/eolian/main.c
View File

@ -14,12 +14,13 @@ enum
GEN_H_LEGACY = 1 << 1,
GEN_H_STUB = 1 << 2,
GEN_C = 1 << 3,
GEN_C_IMPL = 1 << 4
GEN_C_IMPL = 1 << 4,
GEN_D = 1 << 5
};
static const char *_dexts[5] =
static const char *_dexts[6] =
{
".h", ".legacy.h", ".stub.h", ".c", ".c"
".h", ".legacy.h", ".stub.h", ".c", ".c", ".d"
};
static int
@ -50,6 +51,7 @@ _print_usage(const char *progn, FILE *outf)
" s: Stub C header file (.eo.stub.h/.eot.stub.h)\n"
" c: C source file (.eo.c)\n"
" i: Implementation file (.c, merged with existing)\n"
" d: Make-style dependencies (.d)\n"
"\n"
"By default, the 'hc' set is used ('h' for .eot files).\n\n"
"The system-wide Eolian directory is scanned for eo files\n"
@ -98,6 +100,9 @@ _try_set_out(char t, char **outs, const char *val, int *what)
pos = _get_bit_pos(GEN_C_IMPL);
*what |= GEN_C_IMPL;
break;
case 'd':
pos = _get_bit_pos(GEN_D);
*what |= GEN_D;
}
if (pos < 0)
return EINA_FALSE;
@ -420,12 +425,68 @@ _write_impl(const Eolian_State *eos, const char *ofname, const char *ifname)
return ret;
}
static void
_append_dep_line(Eina_Strbuf *buf, Eina_Strbuf *dbuf, char **outs, int gen_what, int what)
{
if (!(gen_what & what))
return;
eina_strbuf_append(buf, outs[_get_bit_pos(what)]);
eina_strbuf_append_buffer(buf, dbuf);
}
static Eina_Bool
_write_deps(const Eolian_State *eos, const char *ofname, const char *ifname,
char **outs, int gen_what)
{
INF("generating deps: %s", ofname);
Eina_Bool ret = EINA_TRUE;
Eina_Strbuf *buf = eina_strbuf_new();
Eina_Strbuf *dbuf = eina_strbuf_new();
const Eolian_Unit *un = eolian_state_unit_by_file_get(eos, ifname);
if (!un)
{
ret = EINA_FALSE;
goto result;
}
eina_strbuf_append(dbuf, ": ");
/* every generated file depends on its .eo/.eot file */
eina_strbuf_append(dbuf, eolian_unit_file_path_get(un));
const Eolian_Unit *dun;
Eina_Iterator *deps = eolian_unit_children_get(un);
EINA_ITERATOR_FOREACH(deps, dun)
{
const char *dpath = eolian_unit_file_path_get(dun);
if (!dpath)
continue;
eina_strbuf_append_char(dbuf, ' ');
eina_strbuf_append(dbuf, dpath);
}
eina_iterator_free(deps);
eina_strbuf_append_char(dbuf, '\n');
_append_dep_line(buf, dbuf, outs, gen_what, GEN_H);
_append_dep_line(buf, dbuf, outs, gen_what, GEN_H_LEGACY);
_append_dep_line(buf, dbuf, outs, gen_what, GEN_H_STUB);
_append_dep_line(buf, dbuf, outs, gen_what, GEN_C);
_append_dep_line(buf, dbuf, outs, gen_what, GEN_C_IMPL);
ret = _write_file(ofname, buf);
result:
eina_strbuf_free(dbuf);
eina_strbuf_free(buf);
return ret;
}
int
main(int argc, char **argv)
{
int pret = 1;
char *outs[5] = { NULL, NULL, NULL, NULL, NULL };
char *outs[6] = { NULL, NULL, NULL, NULL, NULL, NULL };
char *basen = NULL;
Eina_List *includes = NULL;
@ -478,6 +539,9 @@ main(int argc, char **argv)
case 'i':
gen_what |= GEN_C_IMPL;
break;
case 'd':
gen_what |= GEN_D;
break;
default:
fprintf(stderr, "unknown type: '%c'\n", *wstr);
goto end;
@ -575,6 +639,8 @@ main(int argc, char **argv)
succ = _write_source(eos, outs[_get_bit_pos(GEN_C)], eobn, !strcmp(ext, ".eot"));
if (succ && (gen_what & GEN_C_IMPL))
succ = _write_impl(eos, outs[_get_bit_pos(GEN_C_IMPL)], eobn);
if (succ && (gen_what & GEN_D))
succ = _write_deps(eos, outs[_get_bit_pos(GEN_D)], eobn, outs, gen_what);
if (!succ)
goto end;