Writer *FileRead(const char *filename, size_t max_size, bool *truncated)
{
int fd = safe_open(filename, O_RDONLY);
if (fd == -1)
{
return NULL;
}
Writer *w = FileReadFromFd(fd, max_size, truncated);
close(fd);
return w;
}
static PromiseResult RenderTemplateMustache(EvalContext *ctx, const Promise *pp, Attributes a,
EditContext *edcontext)
{
PromiseResult result = PROMISE_RESULT_NOOP;
if (!FileCanOpen(a.edit_template, "r"))
{
cfPS(ctx, LOG_LEVEL_ERR, PROMISE_RESULT_FAIL, pp, a, "Template file '%s' could not be opened for reading", a.edit_template);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
unsigned char existing_output_digest[EVP_MAX_MD_SIZE + 1] = { 0 };
if (access(pp->promiser, R_OK) == 0)
{
HashFile(pp->promiser, existing_output_digest, CF_DEFAULT_DIGEST);
}
int template_fd = safe_open(a.edit_template, O_RDONLY | O_TEXT);
Writer *template_writer = NULL;
if (template_fd >= 0)
{
template_writer = FileReadFromFd(template_fd, SIZE_MAX, NULL);
close(template_fd);
}
if (!template_writer)
{
cfPS(ctx, LOG_LEVEL_ERR, PROMISE_RESULT_FAIL, pp, a, "Could not read template file '%s'", a.edit_template);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
JsonElement *default_template_data = NULL;
if (!a.template_data)
{
a.template_data = default_template_data = DefaultTemplateData(ctx);
}
Buffer *output_buffer = BufferNew();
if (MustacheRender(output_buffer, StringWriterData(template_writer), a.template_data))
{
unsigned char rendered_output_digest[EVP_MAX_MD_SIZE + 1] = { 0 };
HashString(BufferData(output_buffer), BufferSize(output_buffer), rendered_output_digest, CF_DEFAULT_DIGEST);
if (!HashesMatch(existing_output_digest, rendered_output_digest, CF_DEFAULT_DIGEST))
{
if (SaveAsFile(SaveBufferCallback, output_buffer, edcontext->filename, a, edcontext->new_line_mode))
{
cfPS(ctx, LOG_LEVEL_INFO, PROMISE_RESULT_CHANGE, pp, a, "Updated rendering of '%s' from template mustache template '%s'",
pp->promiser, a.edit_template);
result = PromiseResultUpdate(result, PROMISE_RESULT_CHANGE);
}
else
{
cfPS(ctx, LOG_LEVEL_INFO, PROMISE_RESULT_FAIL, pp, a, "Updated rendering of '%s' from template mustache template '%s'",
pp->promiser, a.edit_template);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
}
JsonDestroy(default_template_data);
WriterClose(template_writer);
BufferDestroy(output_buffer);
return result;
}
else
{
cfPS(ctx, LOG_LEVEL_ERR, PROMISE_RESULT_FAIL, pp, a, "Error rendering mustache template '%s'", a.edit_template);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
JsonDestroy(default_template_data);
WriterClose(template_writer);
BufferDestroy(output_buffer);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
}
