X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=tools%2Fdepends.c;h=19229661f2e581f2b4cc6fc86b6d95e4cf9862e7;hp=f1e45c50ebc5fb37c1cf8a44becfbd8141c56f2d;hb=fa7a78f9d3553292b5088b1e7a89d63a2393ab2c;hpb=73753f596f5a588b90bc7ec19773173ec36230be

diff --git a/tools/depends.c b/tools/depends.c
index f1e45c50..19229661 100644
--- a/tools/depends.c
+++ b/tools/depends.c
@@ -3,6 +3,7 @@
 #include <ccan/grab_file/grab_file.h>
 #include <ccan/str_talloc/str_talloc.h>
 #include <ccan/read_write_all/read_write_all.h>
+#include <ccan/compiler/compiler.h>
 #include "tools.h"
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -12,7 +13,7 @@
 #include <unistd.h>
 #include <errno.h>
 
-static char ** __attribute__((format(printf, 2, 3)))
+static char ** PRINTF_FMT(2, 3)
 lines_from_cmd(const void *ctx, const char *format, ...)
 {
 	va_list ap;
@@ -37,7 +38,7 @@ lines_from_cmd(const void *ctx, const char *format, ...)
 
 /* Be careful about trying to compile over running programs (parallel make).
  * temp_file helps here. */
-static char *compile_info(const void *ctx, const char *dir)
+char *compile_info(const void *ctx, const char *dir)
 {
 	char *info_c_file, *info, *ccandir, *compiled, *output;
 	size_t len;
@@ -48,7 +49,7 @@ static char *compile_info(const void *ctx, const char *dir)
 	if (!info)
 		return NULL;
 
-	info_c_file = maybe_temp_file(ctx, ".c", false, "_info");
+	info_c_file = temp_file(ctx, ".c", "_info");
 	fd = open(info_c_file, O_WRONLY|O_CREAT|O_EXCL, 0600);
 	if (fd < 0)
 		return NULL;
@@ -62,7 +63,7 @@ static char *compile_info(const void *ctx, const char *dir)
 	if (strrchr(ccandir, '/'))
 		*strrchr(ccandir, '/') = '\0';
 
-	compiled = maybe_temp_file(ctx, "", false, "info");
+	compiled = temp_file(ctx, "", "info");
 	if (compile_and_link(ctx, info_c_file, ccandir, "",
 			     CCAN_COMPILER, CCAN_CFLAGS " -I.", "",
 			     compiled, &output))
@@ -70,17 +71,16 @@ static char *compile_info(const void *ctx, const char *dir)
 	return NULL;
 }
 
-static char **get_one_deps(const void *ctx, const char *dir, char **infofile)
+static char **get_one_deps(const void *ctx, const char *dir,
+			   char *(*get_info)(const void *ctx, const char *dir))
 {
 	char **deps, *cmd;
+	char *infofile = get_info(ctx, dir);
 
-	if (!*infofile) {
-		*infofile = compile_info(ctx, dir);
-		if (!*infofile)
-			errx(1, "Could not compile _info for '%s'", dir);
-	}
+	if (!infofile)
+		return NULL;
 
-	cmd = talloc_asprintf(ctx, "%s depends", *infofile);
+	cmd = talloc_asprintf(ctx, "%s depends", infofile);
 	deps = lines_from_cmd(cmd, "%s", cmd);
 	if (!deps)
 		err(1, "Could not run '%s'", cmd);
@@ -117,7 +117,7 @@ static char *replace(const void *ctx, const char *src,
 /* This is a terrible hack.  We scan for ccan/ strings. */
 static char **get_one_safe_deps(const void *ctx,
 				const char *dir,
-				char **infofile)
+				char *(*unused)(const void *, const char *))
 {
 	char **deps, **lines, *raw, *fname;
 	unsigned int i, n;
@@ -177,17 +177,17 @@ static bool have_dep(char **deps, const char *dep)
 /* Gets all the dependencies, recursively. */
 static char **
 get_all_deps(const void *ctx, const char *dir,
-	     char **infofile,
-	     char **(*get_one)(const void *, const char *, char **))
+	     char *(*get_info)(const void *ctx, const char *dir),
+	     char **(*get_one)(const void *, const char *,
+			       char *(*get_info)(const void *, const char *)))
 {
 	char **deps;
 	unsigned int i;
 
-	deps = get_one(ctx, dir, infofile);
+	deps = get_one(ctx, dir, get_info);
 	for (i = 0; i < talloc_array_length(deps)-1; i++) {
 		char **newdeps;
 		unsigned int j;
-		char *subinfo = NULL;
 		char *subdir;
 
 		if (!strstarts(deps[i], "ccan/"))
@@ -196,7 +196,7 @@ get_all_deps(const void *ctx, const char *dir,
 		subdir = talloc_asprintf(ctx, "%s/%s",
 					 talloc_dirname(ctx, dir),
 					 deps[i] + strlen("ccan/"));
-		newdeps = get_one(ctx, subdir, &subinfo);
+		newdeps = get_one(ctx, subdir, get_info);
 
 		/* Should be short, so brute-force out dups. */
 		for (j = 0; j < talloc_array_length(newdeps)-1; j++) {
@@ -214,23 +214,55 @@ get_all_deps(const void *ctx, const char *dir,
 	return deps;
 }
 
-char **get_libs(const void *ctx, const char *dir,
-		unsigned int *num, char **infofile)
+/* Can return NULL: _info may not support 'libs'. */
+static char **get_one_libs(const void *ctx, const char *dir,
+			   char *(*get_info)(const void *ctx, const char *dir))
+{
+	char *cmd, **lines;
+
+	cmd = talloc_asprintf(ctx, "%s libs", get_info(ctx, dir));
+	lines = lines_from_cmd(cmd, "%s", cmd);
+	/* Strip final NULL. */
+	if (lines)
+		lines = talloc_realloc(NULL, lines, char *,
+				       talloc_array_length(lines)-1);
+	return lines;
+}
+
+char **get_libs(const void *ctx, const char *dir, bool recurse,
+		char *(*get_info)(const void *ctx, const char *dir))
 {
-	char **libs, *cmd;
+	char **deps, **libs;
+	unsigned int i, len;
+
+	libs = get_one_libs(ctx, dir, get_info);
+	len = talloc_array_length(libs);
+
+	if (recurse) {
+		deps = get_deps(ctx, dir, true, get_info);
+		for (i = 0; deps[i]; i++) {
+			char **newlibs, *subdir;
+			size_t newlen;
+
+			if (!strstarts(deps[i], "ccan/"))
+				continue;
 
-	if (!*infofile) {
-		*infofile = compile_info(ctx, dir);
-		if (!*infofile)
-			errx(1, "Could not compile _info for '%s'", dir);
+			subdir = talloc_asprintf(ctx, "%s/%s",
+						 talloc_dirname(ctx, dir),
+						 deps[i] + strlen("ccan/"));
+
+			newlibs = get_one_libs(ctx, subdir, get_info);
+			newlen = talloc_array_length(newlibs);
+			libs = talloc_realloc(ctx, libs, char *, len + newlen);
+			memcpy(&libs[len], newlibs,
+			       sizeof(newlibs[0])*newlen);
+			len += newlen;
+		}
 	}
 
-	cmd = talloc_asprintf(ctx, "%s libs", *infofile);
-	libs = lines_from_cmd(cmd, "%s", cmd);
-	if (!libs)
-		err(1, "Could not run '%s'", cmd);
-	/* FIXME: Do we need num arg? */
-	*num = talloc_array_length(libs) - 1;
+	/* Append NULL entry. */
+	libs = talloc_realloc(ctx, libs, char *, len + 1);
+	libs[len] = NULL;
 	return libs;
 }
 
@@ -239,6 +271,9 @@ static char **uniquify_deps(char **deps)
 {
 	unsigned int i, j, num;
 
+	if (!deps)
+		return NULL;
+
 	num = talloc_array_length(deps) - 1;
 	for (i = 0; i < num; i++) {
 		for (j = i + 1; j < num; j++) {
@@ -254,22 +289,16 @@ static char **uniquify_deps(char **deps)
 	return talloc_realloc(NULL, deps, char *, num + 1);
 }
 
-char **get_deps(const void *ctx, const char *dir,
-		bool recurse, char **infofile)
+char **get_deps(const void *ctx, const char *dir, bool recurse,
+		char *(*get_info)(const void *ctx, const char *dir))
 {
-	char *temp = NULL, **ret;
-	if (!infofile)
-		infofile = &temp;
+	char **ret;
 
 	if (!recurse) {
-		ret = get_one_deps(ctx, dir, infofile);
+		ret = get_one_deps(ctx, dir, get_info);
 	} else
-		ret = get_all_deps(ctx, dir, infofile, get_one_deps);
+		ret = get_all_deps(ctx, dir, get_info, get_one_deps);
 
-	if (infofile == &temp && temp) {
-		unlink(temp);
-		talloc_free(temp);
-	}
 	return uniquify_deps(ret);
 }