aws account context switcher by Makefile

config

[profile iamA]
aws_access_key_id = 
aws_secret_access_key = 
region = ap-northeast-1

Makefile

.DEFAULT_GOAL:=help
THIS_FILE := $(lastword $(MAKEFILE_LIST))
CRED_TMP := /tmp/.credentials.tmp
CRED := ~/.aws/credentials

PARENT:=iamA
SERIAL:=arn:aws:iam::1234567890ab:mfa/iam-username
DURATION:=

code:=000000

setup: ## install dependency
        @brew install jq

assume/roleA: ## get credential:  `make assume/roleA code=000000`
        @$(MAKE) -f $(THIS_FILE) assume \
                ROLE_ARN=arn:aws:iam::1234567890cd:role/role-a

assume/roleA/long ## get credential longer:  `make assume/roleA/long code=000000`
        @$(MAKE) -f $(THIS_FILE) assume \
                ROLE_ARN=arn:aws:iam::1234567890cd:role/role-a \
                DURATION='--duration-seconds 43200'

assume/roleB: ## get credential:  `make assume/roleB code=000000`
        @$(MAKE) -f $(THIS_FILE) assume \
                ROLE_ARN=arn:aws:iam::1234567890ab:role/role-b

token/iamA : ## get credential:  `make token/iamA CODE=000000`
        aws --profile $(PARENT) sts get-session-token --serial-number $(SERIAL) --token-code $(CODE) > $(CRED_TMP)
        @$(MAKE) -f $(THIS_FILE) output

assume:
        aws --profile $(PARENT) sts assume-role \
            --role-arn $(ROLE_ARN) \
            --role-session-name temp-session \
            --serial-number $(SERIAL) $(DURATION) \
            --token-code $(code) > $(CRED_TMP)
        @$(MAKE) -f $(THIS_FILE) output

output:
        @echo "[default]" > $(CRED)
        @echo aws_access_key_id=$$(cat ${CRED_TMP} | jq -r ".Credentials.AccessKeyId") >> $(CRED)
        @echo aws_secret_access_key=$$(cat ${CRED_TMP} | jq -r ".Credentials.SecretAccessKey") >> $(CRED)
        @echo aws_session_token=$$(cat ${CRED_TMP} | jq -r ".Credentials.SessionToken") >> $(CRED)
        @echo "region = ap-northeast-1" >> $(CRED)

help: ## This STDOUT
          @grep -E '^[/a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'