Generate local hoogle instance based on installed packages, uses ninja to build

hoogle.sh

#!/bin/bash

cd $(dirname $0)
OUTDIR=_out
mkdir -p $OUTDIR

OUTNINJA=$OUTDIR/build.ninja

cat << EOF > $OUTNINJA
rule ln
  command = ln -s \$in \$out

rule hoo
  command = hoogle convert \$in

rule combine
  command = hoogle combine -o \$out \$in

EOF

COMBINE_DEPS=""

for pfx in $(ghc-pkg dump | grep haddock-html | awk '-F:[ ]*' '{ print $2 }'); do
  name=$(echo "$pfx" | sed -E -n 's,^.*doc/(.+)-[^-]+/html$,\1,p')
  if [ -z "$name" ]; then
    name=$(echo "$pfx" | sed -E -n 's,^.*ghc/html/libraries/(.+)-[^-]+$,\1,p')
  fi
  if [ -z "$name" ]; then
    echo "Unknown dir structure: $pfx"
    exit 1
  fi
  if [ -f "$pfx/$name.txt" ]; then
    cat << EOF >> $OUTNINJA
build $name.txt: ln $pfx/$name.txt

build $name.hoo: hoo $name.txt
  haddock = $pfx

EOF

  COMBINE_DEPS="$COMBINE_DEPS $name.hoo"
  fi
done

cat << EOF >> $OUTNINJA
build default.hoo: combine $COMBINE_DEPS
EOF

ninja -C $OUTDIR
exec hoogle server -d $OUTDIR -p 9000