upload-public-file-to-s3.zsh

#!/usr/bin/env zsh

# This is a zsh shell script for uploading files to s3 in order to share
# them via email, sms, or similar. The uploaded files are purged from your
# s3 bucket after 30 days so that you don't incur storage costs. After upload
# the public URLs for your files are copied to the clipboard (if you're using
# a mac and have `pbcopy`). The only zsh-specific part of the code is the
# array append/join (I think). You can likely port this to a different shell
# with relative ease. This requires the AWS CLI, AWS credentials (`aws configure`),
# and an existing bucket (see `$BUCKET` below).
# Run like `share foo-bar.png baz-woot.png`
share () {

    BUCKET="my-bucket-name"

    slugify () {
        echo $1 | iconv -t ascii//TRANSLIT | sed -E 's/[^a-zA-Z0-9]+/-/g' | sed -E 's/^-+|-+$//g' | tr A-Z a-z
    }

    initialize () {
        # Create the bucket
        aws s3 mb s3://$BUCKET >/dev/null

        FILENAME=$(mktemp)

        cat <<EOF >"$FILENAME"
{
    "Rules": [
        {
            "Expiration": {
                "Days": 30
            },
            "ID": "30d expiration",
            "Filter": {
                "Prefix": "30d/"
            },
            "Status": "Enabled",
            "NoncurrentVersionExpiration": {
                "NoncurrentDays": 30
            },
            "AbortIncompleteMultipartUpload": {
                "DaysAfterInitiation": 1
            }
        },
        {
            "Expiration": {
                "Days": 7
            },
            "ID": "7d expiration",
            "Filter": {
                "Prefix": "7d/"
            },
            "Status": "Enabled",
            "NoncurrentVersionExpiration": {
                "NoncurrentDays": 7
            },
            "AbortIncompleteMultipartUpload": {
                "DaysAfterInitiation": 1
            }
        }
    ]
}
EOF
        # Set expiration rules
        aws s3api put-bucket-lifecycle-configuration --bucket $BUCKET --lifecycle-configuration  file://$FILENAME
        rm $FILENAME
    }


    #
    # See if we're going to initialze the bucket
    for arg in "$@"
    do
        case $arg in
            -i|--initialize)
            initialize
            return
            ;;
        esac
    done

    output=()
    upload () {
        CLEAN=`slugify $1`
        aws s3 cp $1 s3://$BUCKET/30d/$CLEAN --acl public-read >/dev/null
        output+=("https://s3.amazonaws.com/$BUCKET/30d/$CLEAN")
    }

    for var in "$@"
    do
        upload "$var"
    done

    printf "%s\n" "${output[@]}" | tee >(pbcopy)
}