Add support for netrc for private mirrors

Author: Jack Parsons

README.md

@@ -209,6 +209,18 @@ e.g.
 $ TFENV_TERRAFORM_VERSION=latest:^0.11. terraform --version
 ```
 
+##### `TFENV_NETRC_PATH`
+
+String (Default: "")
+
+If not empty string, this variable specifies the credentials file used to access the remote location (useful if used in conjunction with TFENV_REMOTE).
+
+e.g.
+
+```console
+$ TFENV_NETRC_PATH="$PWD/.netrc.tfenv"
+```
+
 #### Bashlog Logging Library
 
 ##### `BASHLOG_COLOURS`

lib/helpers.sh

@@ -116,7 +116,13 @@ function curlw () {
     TLS_OPT="";
   fi;
 
-  curl ${TLS_OPT} "$@";
+  if [[ ! -z "${TFENV_NETRC_PATH:-""}" ]]; then
+    NETRC_OPT="--netrc-file ${TFENV_NETRC_PATH}";
+  else
+    NETRC_OPT="";
+  fi;
+
+  curl ${TLS_OPT} ${NETRC_OPT} "$@";
 }
 export -f curlw;