scala-hash

scala-hash.sh

#! /bin/bash

set -e

SCALA_DEV=~/code/scala
HASH=`git --git-dir $SCALA_DEV/.git rev-list "$1" | head -n1`
DESC=`git --git-dir $SCALA_DEV/.git describe $HASH`
shift
DIR=~/usr/scala-$DESC
SCALA=$DIR/pack/bin/scala

if [[ ! -f $SCALA ]]; then
  URL=http://scala-webapps.epfl.ch/artifacts/$HASH/pack.tgz
  echo Downloading $URL
  mkdir -p $DIR
  curl -f $URL | tar -x -z -C $DIR -f -
fi
$DIR/pack/bin/scala "$@"

usage.log

~/code/scala scala-hash '2.10.x@{4 days ago}'
Downloading http://scala-webapps.epfl.ch/artifacts/ea651e6fe187920d207aa5fe3c645d294e72e627/pack.tgz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 24.0M  100 24.0M    0     0   731k      0  0:00:33  0:00:33 --:--:--  831k
Welcome to Scala version 2.10.0-20120911-120015-ea651e6fe1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_27).
Type in expressions to have them evaluated.
Type :help for more information.

scala> 

~/code/scala scala-hash '2.10.x@{4 days ago}'
Welcome to Scala version 2.10.0-20120911-120015-ea651e6fe1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_27).
Type in expressions to have them evaluated.
Type :help for more information.

~/code/scala scala-hash '2.10.x@{12 days ago}' -e 'println("foo")'
Downloading http://scala-webapps.epfl.ch/artifacts/adf2d3632b07eef4fc2303aef994e66584a73f49/pack.tgz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 24.0M  100 24.0M    0     0   891k      0  0:00:27  0:00:27 --:--:--  921k
foo