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✨ Add template-based text formatter

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Nanaloveyuki
2026-05-09 20:41:11 +08:00
parent 3a05efba6a
commit 18479a8b6f
9 changed files with 140 additions and 14 deletions
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bitlogger/README.mbt.md
+14 -4
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@@ -36,8 +36,8 @@ BitLogger 是一个基于 MoonBit 的结构化日志库。
- 支持 `with_patch(...)`、`patch_sink(...)` 以及常见 record patch helper
- explicit queued delivery via `queued_sink(...)` and `with_queue(...)`
- 支持 `queued_sink(...)`、`with_queue(...)`、有界积压与溢出策略
- configurable text formatting via `text_formatter(...)`, `format_text(...)`, and `text_console_sink(...)`
- 支持 `text_formatter(...)`、`format_text(...)`、`text_console_sink(...)` 等文本格式化能力
- configurable text formatting via `text_formatter(...)`, `format_text(...)`, `text_console_sink(...)`, and template-driven `template` output
- 支持 `text_formatter(...)`、`format_text(...)`、`text_console_sink(...)` 以及模板化 `template` 文本输出
- JSON config parsing via `parse_logger_config_text(...)` and `stringify_logger_config(...)`
- 支持 `parse_logger_config_text(...)`、`stringify_logger_config(...)` 进行最小 JSON 配置读写
- config-driven logger assembly via `build_logger(...)`
@@ -144,7 +144,11 @@ test {
```mbt check
test {
let formatter = text_formatter(show_timestamp=false, separator=" | ")
let formatter = text_formatter(
show_timestamp=false,
field_separator=",",
template="[{level}] {target} {message} :: {fields}",
)
let logger = Logger::new(text_console_sink(formatter), target="pretty")
logger.info("hello", fields=[field("mode", "pretty")])
}
@@ -153,7 +157,7 @@ test {
```mbt check
test {
let config = parse_logger_config_text(
"{\"min_level\":\"debug\",\"target\":\"config.demo\",\"timestamp\":true,\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"separator\":\" | \",\"show_timestamp\":false}},\"queue\":{\"max_pending\":2,\"overflow\":\"DropOldest\"}}",
"{\"min_level\":\"debug\",\"target\":\"config.demo\",\"timestamp\":true,\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"show_timestamp\":false,\"field_separator\":\",\",\"template\":\"[{level}] {target} {message} :: {fields}\"}},\"queue\":{\"max_pending\":2,\"overflow\":\"DropOldest\"}}",
)
let logger = build_logger(config)
logger.info("configured from json")
@@ -161,6 +165,12 @@ test {
}
```
## Formatter Template / 模板格式
- supported tokens / 支持的 token: `{timestamp}`, `{timestamp_ms}`, `{level}`, `{target}`, `{message}`, `{fields}`
- disabled or missing parts render as empty text / 被关闭或缺失的部分会渲染为空字符串
- `template` is intentionally a simple token replacement layer, not a full DSL / `template` 当前刻意保持为轻量 token 替换层，而不是完整 DSL
```mbt check
test {
if native_files_supported() {