y0zg / go-3ff

Like a diff for terraform files

3ff

This utility shows modified Terrafrom resources by comparing two files Actually this is an open sourced version of Wix's tfResDiff tool

3ff reads as triff, stands for TeRraForm difF (TRF is substituted by simply 3)

How to build?

In the project directory: $ go build

How to launch?

From the help function:

 Usage of ./3ff:
    -d    Enable debug output to StdErr
    -t    Output modified resources only (For terraform command)
    -version
          Show version info

To compare files command looks just as simple as:

$ ./3ff <source file/dir> <modified file/dir>

To get more verbose output -d key can be used. Output will be printed to stderr. Use still can use redirection to /dev/null to suppress it:

$ ./3ff -d <source file/dir> <modified file/dir> 2>/dev/null

To get list of modified resources to be used by terraform"

$ ./3ff -t <source file/dir> <modified file/dir>

Environment variables

3ff_DEBUG - Enables debug output (Like -d flag)

Changelog

v0.0.1

Initial version, which is a truncated copy of Wix's 3ff utility version 1.2.10

v0.1.4

Can be used publicly as a standalone Terraform comparison tool. Also this version was tested to use in tfResDif as a library

v0.1.5

This version can be used publicly as a standalone tool

v0.1.6

This version can be used publicly in other tools as a library as well as aa standalone tool

0.1.8

Add GetTfResources method which returns all parsed terraform resource names, which can be used as targets in terraform

0.1.9

Add some terraform HCL block resource type support

0.1.12

Can return resource count

0.1.13

Introduced GetTfResourcesCountByPath function

0.1.14

Use of getCount for all known HCL resource types

0.1.15

Remove "processing block" spam message in debug mode