mirror of
https://github.com/docker-mailserver/docker-mailserver.git
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51 lines
1.3 KiB
Bash
Executable file
51 lines
1.3 KiB
Bash
Executable file
#!/bin/bash
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# Wrapper for 'sed -i': fail if file was not modified by sed and container was not restarted.
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# Error output is surpressed, when container is restarted to avoid harmless error messages.
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# Use "--strict" as first parameter, to fail regardless of the container state (fresh or restarted).
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# When to use sedfile?
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# Is a file change optional? --> use regular 'sed -i'
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# Is a file change expected? --> use 'sedfile --strict -i'
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# Is a file change only on the first container run expected? --> use 'sedfile -i'
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set -ueo pipefail
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# shellcheck source=../scripts/helpers/log.sh
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source /usr/local/bin/helpers/log.sh
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function __usage { echo "Usage: ${0} -i <replace/delete operation> <file>" ; }
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HASHTOOL='sha1sum'
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SKIP_ERROR=0
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if [[ ${#} -lt 3 ]]
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then
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_log 'error' 'At least three parameters must be given'
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__usage
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exit 1
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fi >&2
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[[ -f /CONTAINER_START ]] && SKIP_ERROR=1 # hide error if container was restarted
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if [[ ${1} == '--strict' ]] # show error every time
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then
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SKIP_ERROR=0
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shift
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fi
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# get last argument
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FILE=${*: -1}
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OLD=$(${HASHTOOL} "${FILE}")
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sed "${@}"
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NEW=$(${HASHTOOL} "${FILE}")
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# fail if file was not modified
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if [[ ${OLD} == "${NEW}" ]] && [[ ${SKIP_ERROR} -eq 0 ]]
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then
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_log 'error' "No difference after call to 'sed' in 'sedfile' (sed ${*})" >&2
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exit 1
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fi
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exit 0
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