[logback-dev] [JIRA] (LOGBACK-1248) Allow leading zeros in %i pattern

[QOS.CH (JIRA)]

Eugene Petrenko created LOGBACK-1248:
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             Summary: Allow leading zeros in %i pattern
                 Key: LOGBACK-1248
                 URL: https://jira.qos.ch/browse/LOGBACK-1248
             Project: logback
          Issue Type: Bug
          Components: logback-core
    Affects Versions: 1.1.7
            Reporter: Eugene Petrenko
            Assignee: Logback dev list


I use the appender like
{code}
<appender name="ROLL-INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
      <fileNamePattern>${IR}/vcs-info-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
      <maxFileSize>15MB</maxFileSize>
      <maxHistory>100</maxHistory>
    </rollingPolicy>
    <encoder>
      <pattern>${log-format}</pattern>
    </encoder>
  </appender>
{code}

the pattern I specify includes file counter in each day. In may case it may easily turn out I have hundreds of files per day. 

The problem is that {{%i}} syntax does not allow me to have leading zeroes in the names I generates. This ends up it's a but tricky to look through files list I have on my disk, which are sorted in sexicographical order. 

Having an ability to force adding leading zeroes to the pattern will solve the issue.



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