add an option to always print some fields

default_config.toml

@@ -1,6 +1,7 @@
 message_keys = ["short_message", "msg", "message"]
 time_keys = ["timestamp", "time", "@timestamp"]
 dump_all_exclude = []
+always_print_fields = []
 level_keys = ["level", "severity", "log.level", "loglevel"]
 main_line_format = "{{bold(fixed_size 19 fblog_timestamp)}} {{level_style (uppercase (fixed_size 5 fblog_level))}}:{{#if fblog_prefix}} {{bold(cyan fblog_prefix)}}{{/if}} {{fblog_message}}"
 additional_value_format = "{{bold (color_rgb 150 150 150 (fixed_size 25 key))}}: {{value}}"

src/config.rs

@@ -12,10 +12,15 @@ fn default_message_keys() -> Vec<String> {
 fn default_time_keys() -> Vec<String> {
     vec!["timestamp".to_string(), "time".to_string(), "@timestamp".to_string()]
 }
+
 fn default_dump_all_exclude() -> Vec<String> {
     vec![]
 }
 
+fn default_always_print_fields() -> Vec<String> {
+    vec![]
+}
+
 fn default_level_keys() -> Vec<String> {
     vec!["level".to_string(), "severity".to_string(), "log.level".to_string(), "loglevel".to_string()]
 }
@@ -43,6 +48,9 @@ pub struct Config {
     #[serde(default = "default_dump_all_exclude")]
     pub dump_all_exclude: Vec<String>,
 
+    #[serde(default = "default_always_print_fields")]
+    pub always_print_fields: Vec<String>,
+
     #[serde(default = "default_level_keys")]
     pub level_keys: Vec<String>,
 
@@ -87,6 +95,7 @@ impl Config {
             main_line_format: default_main_line_format(),
             additional_value_format: default_additional_value_format(),
             dump_all_exclude: default_dump_all_exclude(),
+            always_print_fields: default_always_print_fields(),
         }
     }
 

src/log_settings.rs

@@ -21,7 +21,7 @@ impl LogSettings {
             time_keys: config.time_keys.clone(),
             level_keys: config.level_keys.clone(),
             level_map: config.level_map.clone(),
-            additional_values: vec![],
+            additional_values: config.always_print_fields.clone(),
             excluded_values: config.dump_all_exclude.clone(),
             dump_all: false,
             with_prefix: false,