dotfiles

commit 3981d56ee9c797d12cffb2de9881ebfa79ece505 (tree)
parent 3987b19c6c27758bd81dbce5d056cdc5fba7a0d3
Author: Motiejus Jakštys <desired.mta@gmail.com>
Date:   Wed, 15 Apr 2020 07:32:26 +0300

add prepare_container

Diffstat:
A
bin/bin/prepare_container.sh
 | 
41
+++++++++++++++++++++++++++++++++++++++++

1 file changed, 41 insertions(+), 0 deletions(-)
diff --git a/bin/bin/prepare_container.sh b/bin/bin/prepare_container.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+set -euo pipefail
+
+dir=$1
+container=$2
+
+TMPDIR=/bigdisk/tmp
+GETIMAGE=/bigdisk/code/moby/contrib/download-frozen-image-v2.sh
+
+prepare_container() {
+    if [[ -d "$dir" ]]; then
+        if [[ -f "$dir/.extract_done" ]]; then
+            echo "$dir already has the filesystem extracted"
+            return
+        fi
+
+        if [[ ! -f "$dir/.extract_started" ]]; then
+            2>&1 echo "$dir exists and does not have magic file, bailing"
+            exit 1
+        else
+            rm -fr "$dir"
+        fi
+    fi
+    mkdir -p "$dir"
+    touch "$dir/.extract_started"
+
+    tmpdir=$(mktemp -d -p "$TMPDIR" "$container"XXXXX)
+    trap "rm -fr $tmpdir" EXIT
+    2>&1 echo "Downloading $container to $tmpdir..."
+    "$GETIMAGE" "$tmpdir" "$container"
+    2>&1 echo -n "Extracting $tmpdir to $dir... "
+    jq -r '.[] | .Layers | .[]' "$tmpdir/manifest.json" | xargs -I{} tar -C "$dir" -xf $tmpdir/{}
+    2>&1 echo "done"
+    touch "$dir/.extract_done"
+    2>&1 echo -n "Removing $tmpdir..."
+    rm -fr "$tmpdir"
+    2>&1 echo "done"
+    trap - EXIT
+}
+
+prepare_container