#include "talloc/talloc.h"
+#include "string/string.h"
#include "tools.h"
#include <err.h>
+#include <stdbool.h>
+#include <unistd.h>
-static char ** __attribute__((format(printf, 2, 3)))
-lines_from_cmd(const void *ctx, char *format, ...)
+static char ** __attribute__((format(printf, 3, 4)))
+lines_from_cmd(const void *ctx, unsigned int *num, char *format, ...)
{
va_list ap;
char *cmd, *buffer;
err(1, "Reading from '%s'", cmd);
pclose(p);
- return split(ctx, buffer, "\n", NULL);
+ return strsplit(ctx, buffer, "\n", num);
}
-static char *build_info(const void *ctx, const char *dir)
+static int unlink_info(char *infofile)
{
- char *file, *cfile, *cmd;
+ unlink(infofile);
+ return 0;
+}
- cfile = talloc_asprintf(ctx, "%s/%s", dir, "_info.c");
- file = talloc_asprintf(cfile, "%s/%s", dir, "_info");
- cmd = talloc_asprintf(file, "gcc " CFLAGS " -o %s %s", file, cfile);
+/* Be careful about trying to compile over running programs (parallel make) */
+static char *compile_info(const void *ctx, const char *dir)
+{
+ char *infofile = talloc_asprintf(ctx, "%s/_info.%u", dir, getpid());
+ char *cmd = talloc_asprintf(ctx, "cc " CFLAGS " -o %s %s/_info.c",
+ infofile, dir);
+ talloc_set_destructor(infofile, unlink_info);
if (system(cmd) != 0)
- errx(1, "Failed to compile %s", file);
+ return NULL;
- return file;
+ return infofile;
}
-char **get_deps(const void *ctx, const char *dir)
+static char **get_one_deps(const void *ctx, const char *dir, unsigned int *num)
{
- char **deps, *cmd;
+ char **deps, *cmd, *infofile;
- cmd = talloc_asprintf(ctx, "%s depends", build_info(ctx, dir));
- deps = lines_from_cmd(cmd, cmd);
+ infofile = compile_info(ctx, dir);
+ if (!infofile)
+ errx(1, "Could not compile _info for '%s'", dir);
+
+ cmd = talloc_asprintf(ctx, "%s depends", infofile);
+ deps = lines_from_cmd(cmd, num, "%s", cmd);
if (!deps)
err(1, "Could not run '%s'", cmd);
return deps;
}
+static bool have_dep(char **deps, unsigned int num, const char *dep)
+{
+ unsigned int i;
+
+ for (i = 0; i < num; i++)
+ if (streq(deps[i], dep))
+ return true;
+ return false;
+}
+
+/* Gets all the dependencies, recursively. */
+char **get_deps(const void *ctx, const char *dir)
+{
+ char **deps;
+ unsigned int i, num;
+
+ deps = get_one_deps(ctx, dir, &num);
+ for (i = 0; i < num; i++) {
+ char **newdeps;
+ unsigned int j, newnum;
+
+ if (!strstarts(deps[i], "ccan/"))
+ continue;
+
+ newdeps = get_one_deps(ctx, deps[i], &newnum);
+
+ /* Should be short, so brute-force out dups. */
+ for (j = 0; j < newnum; j++) {
+ if (have_dep(deps, num, newdeps[j]))
+ continue;
+
+ deps = talloc_realloc(NULL, deps, char *, num + 2);
+ deps[num++] = newdeps[j];
+ deps[num] = NULL;
+ }
+ }
+ return deps;
+}