X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=tools%2Fdepends.c;h=f1ff30904c897d92fef28ba54cd7c41608af76c5;hp=aaae03a94a655d4c9fe8a3d0c686253fb21d0777;hb=9a8344b2cd849a5506ca5e93bfc30665fb35acab;hpb=437fa285d12183a0f1e7450b3a01cbe5620a3507

diff --git a/tools/depends.c b/tools/depends.c
index aaae03a9..f1ff3090 100644
--- a/tools/depends.c
+++ b/tools/depends.c
@@ -1,51 +1,418 @@
-#include "talloc/talloc.h"
+#include <ccan/str/str.h>
+#include <ccan/read_write_all/read_write_all.h>
+#include <ccan/rbuf/rbuf.h>
+#include <ccan/tal/path/path.h>
+#include <ccan/tal/grab_file/grab_file.h>
+#include <ccan/compiler/compiler.h>
+#include <ccan/err/err.h>
 #include "tools.h"
-#include <err.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <errno.h>
 
-static char ** __attribute__((format(printf, 2, 3)))
-lines_from_cmd(const void *ctx, char *format, ...)
+static char ** PRINTF_FMT(2, 3)
+lines_from_cmd(const void *ctx, const char *format, ...)
 {
 	va_list ap;
-	char *cmd, *buffer;
+	char *cmd;
 	FILE *p;
+	struct rbuf in;
 
 	va_start(ap, format);
-	cmd = talloc_vasprintf(ctx, format, ap);
+	cmd = tal_vfmt(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)
+	/* FIXME: Use rbuf_read_str(&in, '\n') rather than strsplit! */
+	rbuf_init(&in, fileno(p), tal_arr(ctx, char, 0), 0);
+	if (!rbuf_read_str(&in, 0, do_tal_realloc) && errno)
 		err(1, "Reading from '%s'", cmd);
 	pclose(p);
 
-	return split(ctx, buffer, "\n", NULL);
+	return tal_strsplit(ctx, in.buf, "\n", STR_EMPTY_OK);
 }
 
-static char *build_info(const void *ctx, const char *dir)
+/* Be careful about trying to compile over running programs (parallel make).
+ * temp_file helps here. */
+char *compile_info(const void *ctx, const char *dir)
 {
-	char *file, *cfile, *cmd;
+	char *info_c_file, *info, *compiled, *output;
+	int fd;
 
-	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);
+	/* Copy it to a file with proper .c suffix. */
+	info = grab_file(ctx, tal_fmt(ctx, "%s/_info", dir));
+	if (!info)
+		return NULL;
 
-	return file;
+	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;
+	if (!write_all(fd, info, tal_count(info)-1))
+		return NULL;
+
+	if (close(fd) != 0)
+		return NULL;
+
+	compiled = temp_file(ctx, "", "info");
+	if (compile_and_link(ctx, info_c_file, find_ccan_dir(dir), "",
+			     compiler, cflags, "", compiled, &output))
+		return compiled;
+	return NULL;
 }
 
-char **get_deps(const void *ctx, const char *dir)
+static char **get_one_deps(const void *ctx, const char *dir, const char *style,
+			   char *(*get_info)(const void *ctx, const char *dir))
 {
 	char **deps, *cmd;
+	char *infofile = get_info(ctx, dir);
+
+	if (!infofile)
+		return NULL;
+
+	cmd = tal_fmt(ctx, "%s %s", infofile, style);
+	deps = lines_from_cmd(cmd, "%s", cmd);
+	if (!deps) {
+		/* You must understand depends, maybe not testdepends. */
+		if (streq(style, "depends"))
+			err(1, "Could not run '%s'", cmd);
+		deps = tal(ctx, char *);
+		deps[0] = NULL;
+	}
+	return deps;
+}
+
+/* Make copy of src, replacing "from" with "to". */
+static char *replace(const void *ctx, const char *src,
+		     const char *from, const char *to)
+{
+	char *ret = tal_strdup(ctx, "");
+	unsigned int rlen, len, add;
+
+	rlen = len = 0;
+	for (;;) {
+		const char *next = strstr(src+len, from);
+		if (!next)
+			add = strlen(src+len) + 1;
+		else
+			add = next - (src+len);
+
+		tal_resize(&ret, rlen + add + strlen(to)+1);
+		memcpy(ret+rlen, src+len, add);
+		if (!next)
+			return ret;
+		len += add;
+		rlen += add;
+		strcpy(ret+rlen, to);
+		rlen += strlen(to);
+		len += strlen(from);
+	}
+}
+
+/* This is a terrible hack.  We scan for ccan/ strings. */
+static char **get_one_safe_deps(const void *ctx,
+				const char *dir,
+				const char *style,
+				char *(*unused)(const void *, const char *))
+{
+	char **deps, **lines, *raw, *fname;
+	unsigned int i, n;
+	bool correct_style = false;
+
+	fname = path_join(ctx, dir, "_info");
+	raw = grab_file(fname, fname);
+	if (!raw)
+		errx(1, "Could not open %s", fname);
+
+	/* Replace \n by actual line breaks, and split it. */
+	lines = tal_strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n",
+			     STR_EMPTY_OK);
+
+	deps = tal_arr(ctx, char *, tal_count(lines));
+
+	for (n = i = 0; lines[i]; i++) {
+		char *str;
+		unsigned int len;
+
+		/* Ignore lines starting with # (e.g. #include) */
+		if (lines[i][0] == '#')
+			continue;
+
+		if (strstr(lines[i], "\"testdepends\""))
+			correct_style = streq(style, "testdepends");
+		else if (strstr(lines[i], "\"depends\""))
+			correct_style = streq(style, "depends");
+
+		if (!correct_style)
+			continue;
+
+		/* Start of line, or after ". */
+		if (strstarts(lines[i], "ccan/"))
+			str = lines[i];
+		else {
+			str = strstr(lines[i], "\"ccan/");
+			if (!str)
+				continue;
+			str++;
+		}
+		
+		len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
+		if (len == 5)
+			continue;
+		deps[n++] = tal_strndup(deps, str, len);
+	}
+	deps[n] = NULL;
+	tal_free(fname);
+
+	/* Make sure tal_array_length() works */
+	tal_resize(&deps, n + 1);
+	return deps;
+}
+
+static bool have_dep(char **deps, const char *dep)
+{
+	unsigned int i;
+
+	for (i = 0; deps[i]; i++)
+		if (streq(deps[i], dep))
+			return true;
+	return false;
+}
+
 
-	cmd = talloc_asprintf(ctx, "%s depends", build_info(ctx, dir));
-	deps = lines_from_cmd(cmd, cmd);
+
+/* Gets all the dependencies, recursively. */
+static char **
+get_all_deps(const void *ctx, const char *dir, const char *style,
+	     char *(*get_info)(const void *ctx, const char *dir),
+	     char **(*get_one)(const void *, const char *, const char *,
+			       char *(*get_info)(const void *, const char *)))
+{
+	char **deps;
+	unsigned int i;
+
+	deps = get_one(ctx, dir, style, get_info);
 	if (!deps)
-		err(1, "Could not run '%s'", cmd);
+		return NULL;
+	for (i = 0; i < tal_count(deps)-1; i++) {
+		char **newdeps;
+		unsigned int j;
+		char *subdir;
+
+		if (!strstarts(deps[i], "ccan/"))
+			continue;
+
+		subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
+		newdeps = get_one(ctx, subdir, "depends", get_info);
+
+		/* Should be short, so brute-force out dups. */
+		for (j = 0; j < tal_count(newdeps)-1; j++) {
+			unsigned int num;
+
+			if (have_dep(deps, newdeps[j]))
+				continue;
+
+			num = tal_count(deps)-1;
+			tal_resize(&deps, num + 2);
+			deps[num] = newdeps[j];
+			deps[num+1] = NULL;
+		}
+	}
 	return deps;
 }
 
+/* Can return NULL: _info may not support prop. */
+static char **get_one_prop(const void *ctx, const char *dir, const char *prop,
+			   char *(*get_info)(const void *ctx, const char *dir))
+{
+	char *cmd, **lines;
+
+	cmd = tal_fmt(ctx, "%s %s", get_info(ctx, dir), prop);
+	lines = lines_from_cmd(cmd, "%s", cmd);
+	/* Strip final NULL. */
+	if (lines)
+		tal_resize(&lines, tal_count(lines)-1);
+	return lines;
+}
+
+static char **get_one_libs(const void *ctx, const char *dir,
+			   char *(*get_info)(const void *ctx, const char *dir))
+{
+	return get_one_prop(ctx, dir, "libs", get_info);
+}
+
+static char **get_one_cflags(const void *ctx, const char *dir,
+			   char *(*get_info)(const void *ctx, const char *dir))
+{
+	return get_one_prop(ctx, dir, "cflags", get_info);
+}
+
+/* O(n^2) but n is small. */
+static char **add_deps(char **deps1, char **deps2)
+{
+	unsigned int i, len;
+
+	len = tal_count(deps1);
+
+	for (i = 0; deps2[i]; i++) {
+		if (have_dep(deps1, deps2[i]))
+			continue;
+		tal_resize(&deps1, len + 1);
+		deps1[len-1] = tal_strdup(deps1, deps2[i]);
+		deps1[len++] = NULL;
+	}
+	return deps1;
+}
+
+char **get_cflags(const void *ctx, const char *dir,
+        char *(*get_info)(const void *ctx, const char *dir))
+{
+	char **flags;
+	unsigned int len;
+	flags = get_one_cflags(ctx, dir, get_info);
+	len = tal_count(flags);
+	tal_resize(&flags, len + 1);
+	flags[len] = NULL;
+	return flags;
+}
+
+static char *get_one_ported(const void *ctx, const char *dir,
+			    char *(*get_info)(const void *ctx, const char *dir))
+{
+	char **ported = get_one_prop(ctx, dir, "ported", get_info);
+
+	/* No news is good news. */
+	if (!ported || tal_count(ported) == 0)
+		return NULL;
+
+	if (tal_count(ported) != 1)
+		errx(1, "%s/_info ported gave %zu lines, not one",
+		     dir, tal_count(ported));
+
+	if (streq(ported[0], ""))
+		return NULL;
+	else
+		return ported[0];
+}
+
+char *get_ported(const void *ctx, const char *dir, bool recurse,
+		char *(*get_info)(const void *ctx, const char *dir))
+{
+	char *msg;
+
+	msg = get_one_ported(ctx, dir, get_info);
+	if (msg)
+		return msg;
+
+	if (recurse) {
+		size_t i;
+		char **deps = get_deps(ctx, dir, "depends", true, get_info);
+		for (i = 0; deps[i]; i++) {
+			char *subdir;
+			if (!strstarts(deps[i], "ccan/"))
+				continue;
+
+			subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
+			msg = get_one_ported(ctx, subdir, get_info);
+			if (msg)
+				return msg;
+		}
+	}
+	return NULL;
+}
+
+char **get_libs(const void *ctx, const char *dir, const char *style,
+		char *(*get_info)(const void *ctx, const char *dir))
+{
+	char **deps, **libs;
+	unsigned int i, len;
+
+	libs = get_one_libs(ctx, dir, get_info);
+	len = tal_count(libs);
+
+	if (style) {
+		deps = get_deps(ctx, dir, style, true, get_info);
+		if (streq(style, "testdepends"))
+			deps = add_deps(deps,
+					get_deps(ctx, dir, "depends", true,
+						 get_info));
+
+		for (i = 0; deps[i]; i++) {
+			char **newlibs, *subdir;
+			size_t newlen;
+
+			if (!strstarts(deps[i], "ccan/"))
+				continue;
+
+			subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
+
+			newlibs = get_one_libs(ctx, subdir, get_info);
+			newlen = tal_count(newlibs);
+			tal_resize(&libs, len + newlen);
+			memcpy(&libs[len], newlibs,
+			       sizeof(newlibs[0])*newlen);
+			len += newlen;
+		}
+	}
+
+	/* Append NULL entry. */
+	tal_resize(&libs, len + 1);
+	libs[len] = NULL;
+	return libs;
+}
+
+/* FIXME: This is O(n^2), which is dumb. */
+static char **uniquify_deps(char **deps)
+{
+	unsigned int i, j, num;
+
+	if (!deps)
+		return NULL;
+
+	num = tal_count(deps) - 1;
+	for (i = 0; i < num; i++) {
+		for (j = i + 1; j < num; j++) {
+			if (streq(deps[i], deps[j])) {
+				memmove(&deps[j], &deps[j+1],
+					(num - j - 1) * sizeof(char *));
+				num--;
+			}
+		}
+	}
+	deps[num] = NULL;
+	/* Make sure tal_count() works */
+	tal_resize(&deps, num + 1);
+	return deps;
+}
+
+char **get_deps(const void *ctx, const char *dir, const char *style,
+		bool recurse,
+		char *(*get_info)(const void *ctx, const char *dir))
+{
+	char **ret;
+
+	if (!recurse) {
+		ret = get_one_deps(ctx, dir, style, get_info);
+	} else
+		ret = get_all_deps(ctx, dir, style, get_info, get_one_deps);
+
+	return uniquify_deps(ret);
+}
+
+char **get_safe_ccan_deps(const void *ctx, const char *dir, const char *style,
+			  bool recurse)
+{
+	char **ret;
+	if (!recurse) {
+		ret = get_one_safe_deps(ctx, dir, style, NULL);
+	} else {
+		ret = get_all_deps(ctx, dir, style, NULL, get_one_safe_deps);
+	}
+	return uniquify_deps(ret);
+}