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jsierles/rsync_cache.sh

Created September 8, 2021 13:18
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  1. Joshua Sierles created this gist Sep 8, 2021.
    31 changes: 31 additions & 0 deletions rsync_cache.sh
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    Original file line number Diff line number Diff line change
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    #!/bin/bash

    set -ue

    # Sync the cache back to the source path.
    # Use --times to preserve timestamps
    # Use --update to make sure that newer files in the source path
    # aren't overwritten by older files in the cache.

    cache_root_path=$1
    cacheable_source_paths=$2
    command=$3

    for path in $cacheable_source_paths; do
    echo "Restoring cache from $cache_root_path/${path} to $path"
    mkdir -p $cache_root_path/${path}
    mkdir -p $path
    rsync --archive --times --update $cache_root_path/${path}/ $path
    done

    echo "Running: ${command}"
    $command

    # Sync the working tree back to the cache.
    # Use --times to preserve timestamps
    # Use --delete to remove files from the cache that aren't present in the source path

    for path in $cacheable_source_paths; do
    echo "Saving $path to cache at $cache_root_path"
    rsync --archive --times --delete $path/ $cache_root_path/$path
    done