1 files changed, 155 insertions, 0 deletions
diff --git a/src/templating/mustach-tool.c b/src/templating/mustach-tool.c
new file mode 100644
index 000000000..364e34a84
--- /dev/null
+++ b/src/templating/mustach-tool.c
@@ -0,0 +1,155 @@
+/*
+ Author: José Bollo <jobol@nonadev.net>
+ Author: José Bollo <jose.bollo@iot.bzh>
+
+ https://gitlab.com/jobol/mustach
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <libgen.h>
+
+#include "mustach-json-c.h"
+
+static const size_t BLOCKSIZE = 8192;
+
+static const char *errors[] = {
+	"??? unreferenced ???",
+	"system",
+	"unexpected end",
+	"empty tag",
+	"tag too long",
+	"bad separators",
+	"too depth",
+	"closing",
+	"bad unescape tag",
+	"invalid interface",
+	"item not found",
+	"partial not found"
+};
+
+static void help(char *prog)
+{
+	printf("usage: %s json-file mustach-templates...\n", basename(prog));
+	exit(0);
+}
+
+static char *readfile(const char *filename)
+{
+	int f;
+	struct stat s;
+	char *result;
+	size_t size, pos;
+	ssize_t rc;
+
+	result = NULL;
+	if (filename[0] == '-' &&  filename[1] == 0)
+		f = dup(0);
+	else
+		f = open(filename, O_RDONLY);
+	if (f < 0) {
+		fprintf(stderr, "Can't open file: %s\n", filename);
+		exit(1);
+	}
+
+	fstat(f, &s);
+	switch (s.st_mode & S_IFMT) {
+	case S_IFREG:
+		size = s.st_size;
+		break;
+	case S_IFSOCK:
+	case S_IFIFO:
+		size = BLOCKSIZE;
+		break;
+	default:
+		fprintf(stderr, "Bad file: %s\n", filename);
+		exit(1);
+	}
+
+	pos = 0;
+	result = malloc(size + 1);
+	do {
+		if (result == NULL) {
+			fprintf(stderr, "Out of memory\n");
+			exit(1);
+		}
+		rc = read(f, &result[pos], (size - pos) + 1);
+		if (rc < 0) {
+			fprintf(stderr, "Error while reading %s\n", filename);
+			exit(1);
+		}
+		if (rc > 0) {
+			pos += (size_t)rc;
+			if (pos > size) {
+				size = pos + BLOCKSIZE;
+				result = realloc(result, size + 1);
+			}
+		}
+	} while(rc > 0);
+
+	close(f);
+	result[pos] = 0;
+	return result;
+}
+
+int main(int ac, char **av)
+{
+	struct json_object *o;
+	char *t;
+	char *prog = *av;
+	int s;
+
+	(void)ac; /* unused */
+
+	if (*++av) {
+		if (!strcmp(*av, "-h") || !strcmp(*av, "--help"))
+			help(prog);
+		if (av[0][0] == '-' && !av[0][1])
+			o = json_object_from_fd(0);
+		else
+			o = json_object_from_file(av[0]);
+#if JSON_C_VERSION_NUM >= 0x000D00
+		if (json_util_get_last_err() != NULL) {
+			fprintf(stderr, "Bad json: %s (file %s)\n", json_util_get_last_err(), av[0]);
+			exit(1);
+		}
+		else
+#endif
+		if (o == NULL) {
+			fprintf(stderr, "Aborted: null json (file %s)\n", av[0]);
+			exit(1);
+		}
+		while(*++av) {
+			t = readfile(*av);
+			s = fmustach_json_c(t, o, stdout);
+			if (s != 0) {
+				s = -s;
+				if (s < 1 || s >= (int)(sizeof errors / sizeof * errors))
+					s = 0;
+				fprintf(stderr, "Template error %s (file %s)\n", errors[s], *av);
+			}
+			free(t);
+		}
+		json_object_put(o);
+	}
+	return 0;
+}
+