eeshow/sch-parse.c (recurse_sheet): move parent/related logic to file.c

eeshow/file.c

@@ -28,8 +28,69 @@ bool file_cat(const struct file *file, void *user, const char *line)
 }
 
 
-void file_open(struct file *file, const char *name,
+static bool try_related(struct file *file)
-    const struct file *related)
+{
+	const char *related;
+	const char *slash;
+	char *tmp;
+	unsigned len;
+
+	if (!file->related)
+		return 0;
+	if (*file->name == '/')
+		return 0;
+
+	related = file->related->name;
+	slash = strrchr(related, '/');
+	if (!slash)
+		return 0;
+
+	len = slash + 1 - related;
+	tmp = alloc_size(len + strlen(file->name) + 1);
+	memcpy(tmp, related, len);
+	strcpy(tmp + len, file->name);
+
+	file->file = fopen(tmp, "r");
+	if (!file->file) {
+		free(tmp);
+		return 0;
+	}
+
+	if (verbose)
+		fprintf(stderr, "reading %s\n", tmp);
+
+	free((char *) file->name);
+	file->name = tmp;
+	return 1;
+}
+
+
+/*
+ * @@@ logic isn't quite complete yet. It should go something like this:
+ *
+ * - if there is no related item,
+ *   - try file,
+ *   - if there is a colon, try VCS,
+ *   - give up
+ * - if there is a related item,
+ *   - if it is a VCS,
+ *     - try the revision matching or predating (if different repo) that of the
+ *       related repo,
+ (     - fall through and try as if it was a file
+ *   - try opening as file. If this fails,
+ *     - if the name of the file to open is absolute, give up
+ *     - try `dirname related`/file_ope_open
+ *     - give up
+ *
+ * @@@ should we see if non-VCS file is in a VCS ? E.g.,
+ * /home/my-libs/foo.lib 1234:/home/my-project/foo.sch
+ * or maybe use : as indictor for VCS, i.e.,
+ * :/home/my-libs/foo.lib ...
+ *
+ * @@@ explicit revision should always win over related.
+ */
+
+void file_open(struct file *file, const char *name, const struct file *related)
 {
 	char *colon, *tmp;
 
@@ -45,6 +106,9 @@ void file_open(struct file *file, const char *name,
 		return;
 	}
 
+	if (try_related(file))
+		return;
+
 	if (verbose)
 		perror(name);
 

eeshow/sch-parse.c

@@ -296,42 +296,20 @@ static struct sheet *new_sheet(struct sch_ctx *ctx)
 static bool parse_line(const struct file *file, void *user, const char *line);
 
 
-static void recurse_sheet(struct sch_ctx *ctx, const struct file *parent_file)
+static void recurse_sheet(struct sch_ctx *ctx, const struct file *related)
 {
 	struct sch_obj **saved_next_obj = ctx->next_obj;
-	const char *parent = parent_file->name;
 	const char *name = ctx->obj.u.sheet.file;
-	char *tmp = NULL;
 	struct file file;
-	struct sch_file dsc = {
-		.parent	= ctx->file,
-	};
 
-	/* @@@ clean this up */
+	/* @@@ clean this up: saved_next_obj is still pending */
-
-	if (access(name, R_OK)) {
-		const char *slash;
-
-		slash = strrchr(parent, '/');
-		if (slash) {
-			unsigned len = slash + 1 - parent;
-
-			tmp = alloc_size(len + strlen(name) + 1);
-			memcpy(tmp, parent, len);
-			strcpy(tmp + len, name);
-			name = tmp;
-		}
-	}
 
 	new_sheet(ctx);
-	ctx->file = &dsc;
 	ctx->state = sch_descr;
-	file_open(&file, name, NULL);
+	file_open(&file, name, related);
 	file_read(&file, parse_line, ctx);
 	file_close(&file);
-	ctx->file = dsc.parent;
 	ctx->next_obj = saved_next_obj;
-	free(tmp);
 }
 
 
@@ -541,11 +519,7 @@ static bool parse_line(const struct file *file, void *user, const char *line)
 void sch_parse(struct sch_ctx *ctx, const char *name, const struct lib *lib)
 {
 	struct file file;
-	struct sch_file dsc = {
-		.parent	= NULL,
-	};
 
-	ctx->file = &dsc;
 	ctx->lib = lib;
 	file_open(&file, name, NULL);
 	file_read(&file, parse_line, ctx);

eeshow/sch.h

@@ -91,10 +91,6 @@ struct sheet {
 	struct sheet *next;
 };
 
-struct sch_file {
-	struct sch_file *parent;
-};
-
 struct sch_ctx {
 	enum sch_state state;
 
@@ -107,8 +103,6 @@ struct sch_ctx {
 	struct sheet **next_sheet;
 
 	const struct lib *lib;
-
-	struct sch_file *file;
 };