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#!/usr/bin/env bash
# Adds Intel copyright notices to files modified by Intel.
# Does not add copyright notices to files that are missing them.
#
# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
# Copyright (c) 2012, 2014, Intel Corporation.
#
TMP=${TMP:-/tmp}
TMPFILE=$(mktemp $TMP/updatecopy.XXXXXX)
EXCFILE=$(mktemp $TMP/excludecopy.XXXXXX)
THISYEAR=$(date +%Y)
DIRS=${*:-"build ldiskfs libcfs lnet lustre lustre-iokit snmp"}

#Old copyright messages we might need to find
OLDCOPY1="Copyright.*"
OLDCOPY2="Use is subject to license terms."
#The current copyright
INTCOPY=${INTCOPY:-"Copyright.*Intel Corporation"}

#Emails we assume ownership of
AUTH_WHAM=${AUTH_WHAM:-".*@whamcloud.com"}
AUTH_INT=${AUTH_INT:-".*@intel.com"}
AUTHOR=${AUTHOR:-$AUTH_INT|$AUTH_WHAM}

START=${START:-"2010-06-01"}	# Post Oracle date
ECHOE=${ECHOE:-"echo -e"}
[ "$($ECHOE foo)" = "-e foo" ] && ECHOE=echo

#Commits to exclude (whitespace, copyright, prefix, revert, delete only, etc)
cat << EXCLUDE_END > $EXCFILE
003df3c38fe74a092f75569793edd6ec5a387d5c
01def2b635ff0b7bacde158d9124334c42cd5d2b
08aa217ce49aba1ded52e0f7adb8a607035123fd
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14d162c5438de959d0ea01fb1b40a7c5dfa764d1
a9ab51fcbd1b4dbe4c23ff774782d598f6f91ffa
1f1d3a376d488d715dd1b0c94d5b66ea05c1e6ca
27bc60aa7cb3c567fd3150cc55a133d60cec2405
2841be335687840cf98961e6c6cde6ee9312e4d7
317ebf88af58e9d9235c90f84b112e931ae69b43
320e014a2c93cb905637d178269b80847cb8d277
3f90f344ae059b30e7d23e4fe554a985eb827b02
4df63615669a69b51c752cc4e416f705f8a56197
5d37670e8507563db556879041c7992936aefa56
60e07b972114df24105a3a1bfa7365892f72a4a7
65701b4a30efdb695776bcf690a2b3cabc928da1
98060d83459ba10409f295898f0ec917f938b4d3
b1e595c09e1b07a6840142b3ae015b8a5a8affeb
b529a917a48cb0873f2898348b25a1074d7e9429
b5a7260ae8f96c3ff9a9948dacc4f17a46943d00
c2c14f31da5f69770d3a46627c81335f5b8d7821
cd8c65642f1c36b56ae74a0414a1f1f27337a662
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e5f552b70dccbd2fdf21ec7b7053a01bcbe062c2
e64d9101cc8ebc61924d6e9db6d7ab3cfa94767c
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fc1475ebdd64cd8eccc603d629ac6b4dcd222445
b6332b5c0dfe28d6b574e206ae651262337a8309
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21d716e6c16424d9deb646456758ebbaa9c70fec
3c1f519956598b0106bd639f0ccae30ce745eb54
faeb94fe81e4646b3121c263521d30e0e83fa71f
3b84a1ee5213563945225854a50e9037bb9646db
c6aab2ca77831852db22b7dc39baed4d06405b7e
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7817e4c785d075aae76b635dcf799064590833b0
930dca7253bc2531bffa15dc763db1081cdf32d8
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355a283fce6998f5b5621adc9697d98d0fb72dfe
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bb6dbca9c2c9bdcd33663d6449b27a671fcaf902
65e067d5d90270d4237a7271008561a4b432b94d
3151aa574e2c9bd3343dad11577cba3c55c16dca
bca975c7fa261ffb926e8a18d5869b886c65f447
8fdb46e476f0f54025fd9ff85c274f2ed86315f0
8f1c8dbe2389e1ef1e1d3387e343fb9a1bb84198
8daba6a7381a2fb8cc933f7e9486f60e659465d4
2bac2cd8f7bf7f31b92e976d500d89b958ab1788
95f85ba9ed5df66a0385755be62254322fc447e1
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3dc94d835dc3adf871c3603fc91c08bdd36701ff
25670bb8c21deb64cfbb277bdeeab6e7ee39aa0e
f4b93dff9a8f4a59976ea864c4e3c2c42faa5770
aab1d832130ee5c181cf7e0e5aa555244d150b00
32bd5051a518c57e35f51b7f3c7f739b5ef91b25
9fdef0896b78d85312269e97962d9818b395f57a
fdd5596593050d22feef05ecba6ba53c65cb3397
4817574ad5a31d6dbafc2bd0dfc2b6a33851ea11
55f2a237320f23cb59df23518f5a72698d4f251c
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315f6e0237b676a7512a4d2fa5765ad57483676e
63a296c31a51cf8ac29f6e339e5686192da14769
6c0fa97869b568a7af2d21e7e4ed2b440b7dfa27
97da796bd3d9b98f6b65ecce493044a3e7404607
9bf46408b3c2c8b7f939d7000a9e8df38c3fd6ed
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ff4357229efe87781e65382c20d3d718ecc3114d
beca050380b592477153fe16b79b7b6bb3aacbf2
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b1ff338ede34421acfc2cdbfe0dbe7b293ebd3b2
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bbee5d1ae941a208d7a07d0348e835ab58ca90ce
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587a25e227024c89eb0802d1b311b5521fd5793c
7e58fd07723483517dbe712ee671db416b6d3ac4
60c9a2d351d40b5306b586d08847b6c7727b73cf
5eef95fee06f712694daba942f8e90a7df96e5e1
3af10d510078ddf050fbda2ef80bdc6920d89f8d
0568e93539ebc1bbec601182f9faba4d43ed106b
1d6d594d1043425a237585d2d5ad33599127dc3d
6e27028b08eace5fc9a141d33499940ef00c9761
2b90c15b72c25711793cc4ea46b964098131c736
d10200a80770f0029d1d665af954187b9ad883df
dad40c1980cbe67ec60055258f435cc3369745db
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fc55dd29cfaccbe925839ff665591c85313e3359
8633aaba2da245bc62b876e535e7ac26385e1385
9c5fad36aac2086b38f91e28db90da01efc9126a
7524da20e134f6bbafb2a10aadc89852c6cd236d
590881dcd2256844d45b5ea325d85057cfcd473b
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8c867d1bcd5e7b09a9cfc063ae82324f9780c0ef
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56ca45bc5a514f415c9c13ae00e2c276a6b82a52
9afa14529b35de066b395abba448e4d2e9c2999f
a1d62378ed98e2663c1f95f955433e2a5b13d68c
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c87553ac891f092f5e9bb4eef9cf06b6516e5e48
bbac283b4488cd34245347e59631e3f0bb3bc792
db46268d3be602f04ff9beb00e15f945dcd44434
c26a4d72445c7ce02e370cc84932d7cc89416966
73c2c103f4f43f9bb37119a2e90d6c0fc1870711
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0ff91d6ad8c71498e29f442119327e166f527281
59ed16fa7591513691a812ada1c9b1ebb2b426f7
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107b2cba7e4a05e2aa7318c20ad7142f88083c35
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3c60d60188e129f1cad3ed79153626fa118376ae
d61792d0f5fa1e313ec216a5dcb833381cbec92b
37cef588d339191f4ed0b8f1f11822f0231dcd78
70e9d4ecc9130aeed1260d78cd8b33a5cde6edd7
80d5a0ed4faab5bb21bcbf856765fd804002d145
b1ff338ede34421acfc2cdbfe0dbe7b293ebd3b2
587a25e227024c89eb0802d1b311b5521fd5793c
6815c3c849e25c060f44db7f730831bcbcbc9091
874690977923f9fa984f608e7bf1d6effda04e6b
5419eabdfedd80d3f30aa456ad7dd35c3198729b
cc311c0c9f884234a3458f471640a40d24c011b5
226fdfbd8d177587787f473f4fb48714e1ffad91
ee41ed7803c860cb79782b3d7df8ac2b8e0ab31a
20c748658000f5454f38576af506643e370bb1bc
e439ba810daaebd7a51a112100a182caca72ac35
4ddad88d15d8f9e36c5cbb9fd5611a3d8e16ea8c
f13b2a4cea69d8c4c079d03d58f55d32a54a9679
c7558380b8e6dc6ac23879959731938bd5d32709
ef6bb2cd842d18e6fbe4f6160467a9318c1862e0
650b7450b612943e7ade76434c3be70b06f58f58
e5eaaff6e378b8c95d0a809f4dd3b4817d9fd492
4ed67efd13cddd7ec41d29e853601ce862aaae9e
434eeba4d33d9ddd871cff080d51534081bb3d30
558c93dc56dc603be0b4e065a5ffe8b448f33bd5
53d3890f16e4c6e5717c4d020ef213897a36c2b7
bcb737a19433e3e32df6a826f29d15a3666f54d8
40fe3cd7283dfd1cee5f989483c517601ac773f8
e5eaaff6e378b8c95d0a809f4dd3b4817d9fd492
EXCLUDE_END
[ -n "$EXCLUDE" ] && echo "$EXCLUDE" >> $EXCFILE

HASHFILE=$TMP/hash_list
> $TMP/hash_list
git ls-files $DIRS | while read FILE; do
	FILE=$FILE # just so FILE shows up in "sh -vx" output
	case "$FILE" in
	*/list.h)
		# file is copied from upstream kernel
		continue ;;
	*/liblustreapi.h)
		# file just includes lustreapi.h, copyrights are in there
		continue ;;
	*/*.patch|*/*.series)
		# patches can't add copyrights easily
		continue ;;
	*/lustre_dlm_flags.h)
		# file is automatically generated
		continue ;;
	*/.gitignore)
		continue ;;
	*/LCOPYING)
		# just a copy of the LGPL, don't claim copyright
		continue ;;
	esac

	OLDCOPY=$(grep -E "$INTCOPY" $FILE | tail -n1)
	# Skip files that already have a copyright for this year
	[ -n "$(grep -E -e $THISYEAR <<<"$OLDCOPY")" ] && continue

	ADDCOPY=false
	# Pick only files that have changed since $START
	# %ai author dates holds has bad data, use %ci instead
	# Exclude revert commits and the patch being reverted.
	git log --follow --since=$START --pretty=format:"%ci %ae %H" $FILE |
		grep -v -f $EXCFILE | grep -E -e "$AUTHOR" |
		while read YYYY TTTT TZZZ AUTHOR HASH; do
			REVERT=$(git show -s $HASH |
				 awk '/This reverts commit/ { print $4 }')
			if [ -n "$REVERT" ]; then
				echo $HASH >> $EXCFILE
				tr -d . <<<$REVERT >> $EXCFILE
				continue
			fi
			echo "$YYYY $TTTT $TZZZ $AUTHOR $HASH"
		done > $TMPFILE.2
	grep -v -f $EXCFILE $TMPFILE.2 > $TMPFILE

	# Skip files not modified by $AUTHOR
	[ -s "$TMPFILE" ] || continue

	if [ -z "$(grep -E -e "$OLDCOPY1" $FILE)" ]; then
		case $FILE in
		*.[ch])
			echo "$FILE: ** NO COPYRIGHT. INSPECT  **"
			continue ;;
		*)
			continue ;;
		esac
	fi

	if [ -z "$(grep "$INTCOPY" <<<"$OLDCOPY")" ]; then
		ADDCOPY=true
		OLDCOPY="$(grep -E "$OLDCOPY1|$OLDCOPY2" $FILE |
			   tail -n1 | tr / .)"
	fi

	# Get commit dates
	NEWYEAR=$(head -1 $TMPFILE | cut -d- -f 1)
	OLDYEAR=$(tail -1 $TMPFILE | cut -d- -f 1)

	if [ "$NEWYEAR" -lt "$OLDYEAR" ]; then
		echo "$FILE: ** YEAR INVERSION: INSPECT  **"
		continue;
	fi

	[ $NEWYEAR == $OLDYEAR ] && YEAR="$NEWYEAR" || YEAR="$OLDYEAR, $NEWYEAR"
	# The man page comment .\" needs to be escaped, and the '\' reinforced
	COMMENT=$(sed -e 's/^\( *[\*#\.\"\\]*\) *[A-Z(].*/\1/' -e 's/\\/\\\\/' \
		  <<<"$OLDCOPY")
	NEWCOPY=$(sed -e"s/^/$COMMENT /" -e"s/\.\*/ (c) $YEAR, /" -e's/\.*$//' \
		  <<<"$INTCOPY").

	# '.\"' as a COMMENT in a man page isn't escaped correctly
	#case "$FILE" in
	#*/*.[1-9])
	#	echo "$FILE: *** EDIT MANUALLY ***"
	#	continue ;;
	#esac

	# If copyright is unchanged (excluding whitespace), we're done
	[ "$OLDCOPY" == "$NEWCOPY" ] && continue

	# Log all changes this year, to help find "noisy" patches
	awk '/'$THISYEAR'-/ { print $5 }' $TMPFILE | cut -c1-12 >> $HASHFILE

	[ ! -w $FILE ] && echo "$FILE: *** can't write, EDIT MANUALLY ***" &&
		continue

	if $ADDCOPY; then
		echo "$FILE: $NEWCOPY (newly added) ** INSPECT **"
		# Add a new copyright line after the existing copyright.
		# Using a temporary file is ugly, but I couldn't get
		# newlines into the substitution pattern for some reason,
		# and this is not a performance-critical process.
		$ECHOE "${COMMENT}\n${NEWCOPY}" > $TMPFILE
		# The man page comment .\" (currently .") needs '\' added back
		sed -e "/$OLDCOPY/r $TMPFILE" \
		    -e 's/^\."/.\\"/' $FILE > $FILE.tmp
	else
		if grep -q "Commissariat" <<<"$OLDCOPY"; then
			INSPECT="** INSPECT **"
		else
			INSPECT=""
		fi
		echo "$FILE: $NEWCOPY $INSPECT"
		# Replace the old copyright line with a new copyright
		# The man page comment .\" (currently .") needs '\' added back
		sed -e "s/.*$INTCOPY.*/$NEWCOPY/" \
		    -e 's/^\."/.\\"/' $FILE > $FILE.tmp
	fi
	[ -s $FILE.tmp ] && cp $FILE.tmp $FILE && rm -f $FILE.tmp
#exit
done
if [ -s $HASHFILE ]; then
	echo "commits causing the most changes"
	sort $HASHFILE | uniq -c | sort -nr | head -30 | while read CNT HASH; do
		echo $CNT $(git show --oneline --no-patch $HASH)
	done

fi
rm -f $TMPFILE $TMPFILE.2