This script reads terragrunt.hcl and swaps the source in the Terraform *.tf files for the module specified in terragrunt.hcl.
This is useful when you want to swap the source of a module in other environments while using same Terraform root module.
Feb. 2025 Update: An additional option is to set the repo versioning. By using the wild card '*' you can set all calls in your script to other repos to a specific version. You can also change a specific module's source version by specifying the module name.
Enter a source-swap block as shown in the examples below. Commenting out the block is not longer needed.
Code was changed to remove the source-swap block during runtime.
Note: This is not a function of Terragrunt.
source-swap "my-module" {
old-source = "git::https://github.com/org/repository//module-call"
new-source = "git::https://github.com/org/repository//module-call?ref=test"
}
source-swap "my-module2" {
old-source = "git::https://github.com/org/repository//module-call"
new-source = "git::https://github.com/org/repository//module-call?ref=test"
}
source-swap "my-module" {
repo-name = "NameOfTheRepo"
repo-version = "v0.0.2"
}
# Wild card * can be used to swap all occurrences of old-source with new-source in main.tf
source-swap "*" {
old-source = "git::https://github.com/org/repository//module-call"
new-source = "git::https://github.com/org/repository//module-call?ref=test"
}
source-swap "*" {
repo-name = "NameOfTheRepo"
repo-version = "v0.0.2"
}Run this script in the same directory where you run Terragrunt.exe.
I run it in the yaml pipeline as follows: (copy depends on where you place it of course. Here I have it my Terragrunt root)
- name: Copy source-swap.sh to current folder
run: |
cp ../../../source-swap.sh .
pwd
ls -la
- name: Run source-swap.sh to replace module sources if requested in terragrunt.hcl
run: |
chmod +x ./source-swap.sh
./source-swap.sh