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Speed up construction of MANIFEST.MF lines in java_stub_template #8196

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Speed up construction of MANIFEST.MF lines in java_stub_template #8196

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6 changes: 4 additions & 2 deletions src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -314,12 +314,14 @@ function create_and_run_classpath_jar() {
CLASSPATH_LINE="Class-Path:$MANIFEST_CLASSPATH"
# No line in the MANIFEST.MF file may be longer than 72 bytes.
# A space prefix indicates the line is still the content of the last attribute.
for ((i = 0; i < "${#CLASSPATH_LINE}"; i += 71)); do
IFS=$'\n'
WRAPPED_LINES=($(echo "$CLASSPATH_LINE" | fold -w 71))
for ((i = 0; i < "${#WRAPPED_LINES[*]}"; i += 1)); do
PREFIX=" "
if ((i == 0)); then
PREFIX=""
fi
echo "$PREFIX${CLASSPATH_LINE:$i:71}"
echo "$PREFIX${WRAPPED_LINES[$i]}"
done
echo "Created-By: Bazel"
) >$MANIFEST_FILE
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