I got a command which works perfectly on linux

date -d @$(git log -1 --format=%at) '+%Y-%m-%d_%H-%M-%S'

and now i'm trying to do same formatting with busybox, but i always fail

  • What version of busybox are you using? how exactly does it fail? – steeldriver Jun 11 '20 at 12:50
  • @steeldriver BusyBox v1.31.1, invalid date '1591877098' – daveN Jun 11 '20 at 13:00
  • 1
    Are you sure you didn't omit the leading @? – steeldriver Jun 11 '20 at 13:30

date help from the busybox docs:

date [OPTIONS] [+FMT] [TIME]

Display time (using +FMT), or set time


        [-s] TIME       Set time to TIME
        -u              Work in UTC (don't convert to local time)
        -R              Output RFC-822 compliant date string
        -I[SPEC]        Output ISO-8601 compliant date string
                        SPEC='date' (default) for date only,
                        'hours', 'minutes', or 'seconds' for date and
                        time to the indicated precision
        -r FILE         Display last modification time of FILE
        -d TIME         Display TIME, not 'now'
        -D FMT          Use FMT for -d TIME conversion
Recognized TIME formats:

        YYYY-MM-DD hh:mm[:ss]

So, epoch seconds are not a valid input time format.

Does %ai or %aI not give you close enough to what you need?:

$ git help log
                   author date, UNIX timestamp

                   author date, ISO 8601-like format

                   author date, strict ISO 8601 format

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