Adding and swapping lines in sed

add-and-swap.sh

# I had a bunch of files across three different directories
# I wanted to combine them into one big directory with a "format" marker to indicate what type of file they were
# Here's how I did it in sed

mkdir tmp
cp gitrepos/* tmp/
cd tmp

for f in *.md ; do sed -i '' '3 i\
format: gitrepo
' $f ; done

for f in *.md ; do sed -i '' 's/repourl/url/g' $f ; done

# avoid name collisions
for f in *.md ; do mv $f `echo $f | sed 's/.md//g'`-gitrepos.md  ; done

mv tmp/* dest