Added AWS plugin

- awskeys, helper function for credentials profiles

plugins/available/aws.plugin.bash

@@ -0,0 +1,72 @@
+cite about-plugin
+about-plugin 'AWS helper functions'
+
+function awskeys {
+    about 'helper function for AWS credentials file'
+    group 'aws'
+    if [[ $# -eq 0 ]]; then
+        __awskeys_help
+    elif [[ $# -eq 1 ]] && [[ "$1" = "list" ]]; then
+        __awskeys_list "$2"
+    elif [[ $# -eq 2 ]]; then
+        if [[ "$1" = "show" ]]; then
+            __awskeys_show "$2"
+        elif [[ "$1" = "export" ]]; then
+            __awskeys_export "$2"
+        else
+            __awskeys_help
+        fi
+    else
+        __awskeys_help
+    fi
+}
+
+function __awskeys_help {
+    echo -e "Usage: awskeys [COMMAND] [profile]\n"
+    echo -e "Helper to AWS credentials file.\n"
+    echo -e "Commands:\n"
+    echo "   help    Show this help message"
+    echo "   list    List available credentials profiles"
+    echo "   show    Show the keys associated to a credentials profile"
+    echo "   export  Export a credentials profile keys as environment variables"
+}
+
+function __awskeys_get {
+    local ln=$(grep -n "\[ *$1 *\]" ~/.aws/credentials | cut -d ":" -f 1)
+    if [[ -n "${ln}" ]]; then
+        tail -n +${ln} ~/.aws/credentials | egrep -m 2 "aws_access_key_id|aws_secret_access_key"
+    fi
+}
+
+function __awskeys_list {
+    local credentials_list="$(egrep '^\[ *[a-zA-Z0-0_-]+ *\]$' ~/.aws/credentials)"
+    if [[ -n $"{credentials_list}" ]]; then
+        echo -e "Available credentials profiles:\n"
+        for cred in ${credentials_list}; do
+            echo "    $(echo ${cred} | tr -d "[]")"
+        done
+        echo
+    else
+        echo "No profiles found in credentials file"
+    fi
+}
+
+function __awskeys_show {
+    local p_keys="$(__awskeys_get $1)"
+    if [[ -n "${p_keys}" ]]; then
+        echo "${p_keys}"
+    else
+        echo "Profile $1 not found in credentials file"
+    fi
+}
+
+function __awskeys_export {
+    local p_keys="$(__awskeys_get $1)"
+    if [[ -n "${p_keys}" ]]; then
+        eval $(echo "${p_keys}" | tr -d " " | sed -r -e "s/(.+=)(.+)/export \U\1\E\2/")
+        export AWS_DEFAULT_PROFILE="$1"
+    else
+        echo "Profile $1 not found in credentials file"
+    fi
+}
+