Split tools unto parts for fixing run_tests to link req'd deps.

[ccan-lca-2011.git] / tools / depends.c

diff --git a/tools/depends.c b/tools/depends.c
new file mode 100644 (file)
index 0000000..aaae03a
--- /dev/null
+++ b/tools/depends.c
@@ -0,0 +1,51 @@
+#include "talloc/talloc.h"
+#include "tools.h"
+#include <err.h>
+
+static char ** __attribute__((format(printf, 2, 3)))
+lines_from_cmd(const void *ctx, char *format, ...)
+{
+       va_list ap;
+       char *cmd, *buffer;
+       FILE *p;
+
+       va_start(ap, format);
+       cmd = talloc_vasprintf(ctx, format, ap);
+       va_end(ap);
+
+       p = popen(cmd, "r");
+       if (!p)
+               err(1, "Executing '%s'", cmd);
+
+       buffer = grab_fd(ctx, fileno(p));
+       if (!buffer)
+               err(1, "Reading from '%s'", cmd);
+       pclose(p);
+
+       return split(ctx, buffer, "\n", NULL);
+}
+
+static char *build_info(const void *ctx, const char *dir)
+{
+       char *file, *cfile, *cmd;
+
+       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);
+       if (system(cmd) != 0)
+               errx(1, "Failed to compile %s", file);
+
+       return file;
+}
+
+char **get_deps(const void *ctx, const char *dir)
+{
+       char **deps, *cmd;
+
+       cmd = talloc_asprintf(ctx, "%s depends", build_info(ctx, dir));
+       deps = lines_from_cmd(cmd, cmd);
+       if (!deps)
+               err(1, "Could not run '%s'", cmd);
+       return deps;
+}
+