Add helper script for reproducing experiments

reproduce_experiment.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+set -e
+
+function usage() {
+    echo "Usage: $0 <experiment_dir> <output_root>"
+}
+
+if [[ "$#" < 2 ]] ; then
+    usage >&2
+    exit 1
+fi
+
+experiment_dir="$1"
+output_root="$2"
+
+if [[ ! -d ${experiment_dir} ]] ; then
+    echo "ERROR: Experiment directory does not exist!" >&2
+    exit 1
+fi
+
+if [[ ! -d ${output_root} ]] ; then
+    echo "ERROR: Output root directory does not exist!" >&2
+    exit 1
+fi
+
+experiment_id=$(cat ${experiment_dir}/experiment-id.txt)
+if [[ -e "${experiment_id}/git-head.txt" ]] ; then
+    commit_id=$(cat ${experiment_dir}/git-head.txt)
+else
+    short_commit_id=$(\
+        head -1 ${experiment_dir}/git-log.txt \
+        | sed -e 's/^\* \([^ ]*\).*/\1/g')
+    commit_id=$(git rev-parse ${short_commit_id})
+fi
+
+git worktree add --detach $(readlink -e ${output_root})/${experiment_id}
+echo "### Created worktree at ${output_root}/${experiment_id}"
+
+cd ${output_root}/${experiment_id}
+
+git checkout ${commit_id} > /dev/null
+echo "### Checked out ${commit_id}"
+
+git apply ${experiment_dir}/git-diff.patch
+echo "### Applied git diff patch"
+
+ln -s ${experiment_dir}/config.yaml config-${experiment_id}.yaml
+echo "### Copied config to config-${experiment_id}.yaml"
+
+echo "### Compiling video_util"
+git submodule update --init --recursive
+cd video_util
+make
+# Old versions of code accidentally imported video_frames_pb.lua from the
+# video_util directory instead of the util subdirectory.
+ln -s util/video_frames_pb.lua video_frames_pb.lua