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mdelillo/insert-lines.sh

Last active March 14, 2020 01:33
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Insert multiple lines containing trailing slashes after a matching line in a file
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insert-lines.sh
#!/usr/bin/env bash
set -euo pipefail
cat >file.txt << 'EOF'
LINE 1 \
LINE 2 \
LINE 5
EOF
set +e
IFS= read -r -d '' missing_lines << 'EOF'
LINE 3 \
LINE 4 \
EOF
set -e
awk -v lines="$missing_lines" -i inplace '{print} /LINE 2/{printf lines}' file.txt
# OUTPUT:
# LINE 1 \
# LINE 2 \
# LINE 3 \
# LINE 4 \
# LINE 5
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