16 lines
685 B
Bash
Executable File
16 lines
685 B
Bash
Executable File
#!/bin/bash
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#
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# Prefixes all lines on stdout and stderr with the process name (as determined by
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# the SUPERVISOR_PROCESS_NAME env var, which is automatically set by Supervisor).
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#
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# Usage:
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# prefix-log command [args...]
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#
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# '-W interactive' is a `mawk` extension which disables buffering on stdout and sets line-buffered reads on
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# stdin. The effect is that the output is flushed after each line, rather than being batched, which helps reduce
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# confusion due to to interleaving of the different processes.
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exec 1> >(awk -W interactive '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0 }' >&1)
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exec 2> >(awk -W interactive '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0 }' >&2)
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exec "$@"
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