Pull down all custom metadata records for a Salesforce org and unpack them into the DX format

get_mdt.sh

# Pull down all custom metadata records for a Salesforce org and unpack them into the DX format
# Run from the root of your Salesforce DX project, the script assumes that your project is a git repo
#!/bin/bash

mkdir .tmp

echo '<?xml version="1.0" encoding="UTF-8"?><Package xmlns="http://soap.sforce.com/2006/04/metadata"><types><name>CustomMetadata</name><members>*</members></types><version>41.0</version></Package>' > .tmp/package.xml

echo 'Retrieving metadata from Salesforce...'
sfdx force:mdapi:retrieve --retrievetargetdir .tmp/ --wait 5 --unpackaged .tmp/package.xml

echo 'Unzipping package...'
cd .tmp
unzip unpackaged.zip

cd unpackaged/customMetadata

echo 'Renaming md files to md-meta.xml...'
for f in *.md; do 
    mv -- "$f" "${f%.md}.md-meta.xml"
done

echo 'Moving metadata records...'
mv *.xml ../../../force-app/main/default/customMetadata

echo 'Cleanup...'
cd ../../..

rm -rf .tmp

git status 

echo 'Done!'