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#!/bin/sh
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#
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# This shell script updates the copyright headers in source code files
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# in the current branch that have been added or modified during the
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# current year (at least as much as the `git diff` command supports the
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# date range in terms of log history).
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#
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# This has only been tested on mac OS.
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current_year=$(date +'%Y')
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echo Updating copyright headers in Java, Kotlin, and Groovy source code for year $current_year
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# Added/Modified this year and committed
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for file in $(git --no-pager diff --name-only --diff-filter=AM @{$current_year-01-01}..@{$current_year-12-31} | egrep "^.+\.(java|kt|groovy)$" | uniq); do
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sed -i '' -E "s/Copyright 2002-[0-9]{4}/Copyright 2002-$current_year/g" $file;
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done
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# Added/Modified and staged but not yet committed
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for file in $(git --no-pager diff --name-only --diff-filter=AM --cached | egrep "^.+\.(java|kt|groovy)$" | uniq); do
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sed -i '' -E "s/Copyright 2002-[0-9]{4}/Copyright 2002-$current_year/g" $file;
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done
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