1 files changed, 192 insertions, 35 deletions
diff --git a/plugins/aws/aws.plugin.zsh b/plugins/aws/aws.plugin.zsh
index f78e96ce3..e1566b113 100644
--- a/plugins/aws/aws.plugin.zsh
+++ b/plugins/aws/aws.plugin.zsh
@@ -1,49 +1,206 @@
-_homebrew-installed() {
-  type brew &> /dev/null
-  _xit=$?
-  if [ $_xit -eq 0 ];then
-        # ok , we have brew installed
-        # speculatively we check default brew prefix
-        if [ -h  /usr/local/opt/awscli ];then
-                _brew_prefix="/usr/local/opt/awscli"
-        else
-                # ok , it is not default prefix
-                # this call to brew is expensive ( about 400 ms ), so at least let's make it only once
-                _brew_prefix=$(brew --prefix awscli)
-        fi
-        return 0
-   else
-        return $_xit
-   fi
+function agp() {
+  echo $AWS_PROFILE
 }
 
-_awscli-homebrew-installed() {
-  [ -r $_brew_prefix/libexec/bin/aws_zsh_completer.sh ] &> /dev/null
+# AWS profile selection
+function asp() {
+  if [[ -z "$1" ]]; then
+    unset AWS_DEFAULT_PROFILE AWS_PROFILE AWS_EB_PROFILE
+    echo AWS profile cleared.
+    return
+  fi
+
+  local -a available_profiles
+  available_profiles=($(aws_profiles))
+  if [[ -z "${available_profiles[(r)$1]}" ]]; then
+    echo "${fg[red]}Profile '$1' not found in '${AWS_CONFIG_FILE:-$HOME/.aws/config}'" >&2
+    echo "Available profiles: ${(j:, :)available_profiles:-no profiles found}${reset_color}" >&2
+    return 1
+  fi
+
+  export AWS_DEFAULT_PROFILE=$1
+  export AWS_PROFILE=$1
+  export AWS_EB_PROFILE=$1
 }
 
-function agp {
-  echo $AWS_PROFILE
+# AWS profile switch
+function acp() {
+  if [[ -z "$1" ]]; then
+    unset AWS_DEFAULT_PROFILE AWS_PROFILE AWS_EB_PROFILE
+    unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN
+    echo AWS profile cleared.
+    return
+  fi
+
+  local -a available_profiles
+  available_profiles=($(aws_profiles))
+  if [[ -z "${available_profiles[(r)$1]}" ]]; then
+    echo "${fg[red]}Profile '$1' not found in '${AWS_CONFIG_FILE:-$HOME/.aws/config}'" >&2
+    echo "Available profiles: ${(j:, :)available_profiles:-no profiles found}${reset_color}" >&2
+    return 1
+  fi
+
+  local profile="$1"
+
+  # Get fallback credentials for if the aws command fails or no command is run
+  local aws_access_key_id="$(aws configure get aws_access_key_id --profile $profile)"
+  local aws_secret_access_key="$(aws configure get aws_secret_access_key --profile $profile)"
+  local aws_session_token="$(aws configure get aws_session_token --profile $profile)"
+
+
+  # First, if the profile has MFA configured, lets get the token and session duration
+  local mfa_serial="$(aws configure get mfa_serial --profile $profile)"
+  local sess_duration="$(aws configure get duration_seconds --profile $profile)"
+
+  if [[ -n "$mfa_serial" ]]; then
+    local -a mfa_opt
+    local mfa_token
+    echo -n "Please enter your MFA token for $mfa_serial: "
+    read -r mfa_token
+    if [[ -z "$sess_duration" ]]; then
+      echo -n "Please enter the session duration in seconds (900-43200; default: 3600, which is the default maximum for a role): "
+      read -r sess_duration
+    fi
+    mfa_opt=(--serial-number "$mfa_serial" --token-code "$mfa_token" --duration-seconds "${sess_duration:-3600}")
+
+    # Now see whether we need to just MFA for the current role, or assume a different one
+    local role_arn="$(aws configure get role_arn --profile $profile)"
+    local sess_name="$(aws configure get role_session_name --profile $profile)"
+
+    if [[ -n "$role_arn" ]]; then
+      # Means we need to assume a specified role
+      aws_command=(aws sts assume-role --role-arn "$role_arn" "${mfa_opt[@]}")
+
+      # Check whether external_id is configured to use while assuming the role
+      local external_id="$(aws configure get external_id --profile $profile)"
+      if [[ -n "$external_id" ]]; then
+        aws_command+=(--external-id "$external_id")
+      fi
+
+      # Get source profile to use to assume role
+      local source_profile="$(aws configure get source_profile --profile $profile)"
+      if [[ -z "$sess_name" ]]; then
+        sess_name="${source_profile:-profile}"
+      fi
+      aws_command+=(--profile="${source_profile:-profile}" --role-session-name "${sess_name}")
+
+      echo "Assuming role $role_arn using profile ${source_profile:-profile}"
+    else
+      # Means we only need to do MFA
+      aws_command=(aws sts get-session-token --profile="$profile" "${mfa_opt[@]}")
+      echo "Obtaining session token for profile $profile"
+    fi
+
+    # Format output of aws command for easier processing
+    aws_command+=(--query '[Credentials.AccessKeyId,Credentials.SecretAccessKey,Credentials.SessionToken]' --output text)
+
+    # Run the aws command to obtain credentials
+    local -a credentials
+    credentials=(${(ps:\t:)"$(${aws_command[@]})"})
+
+    if [[ -n "$credentials" ]]; then
+      aws_access_key_id="${credentials[1]}"
+      aws_secret_access_key="${credentials[2]}"
+      aws_session_token="${credentials[3]}"
+    fi
+  fi
+
+  # Switch to AWS profile
+  if [[ -n "${aws_access_key_id}" && -n "$aws_secret_access_key" ]]; then
+    export AWS_DEFAULT_PROFILE="$profile"
+    export AWS_PROFILE="$profile"
+    export AWS_EB_PROFILE="$profile"
+    export AWS_ACCESS_KEY_ID="$aws_access_key_id"
+    export AWS_SECRET_ACCESS_KEY="$aws_secret_access_key"
+
+    if [[ -n "$aws_session_token" ]]; then
+      export AWS_SESSION_TOKEN="$aws_session_token"
+    else
+      unset AWS_SESSION_TOKEN
+    fi
+
+    echo "Switched to AWS Profile: $profile"
+  fi
 }
 
-function asp {
-  local rprompt=${RPROMPT/<aws:$(agp)>/}
+function aws_change_access_key() {
+  if [[ -z "$1" ]]; then
+    echo "usage: $0 <profile>"
+    return 1
+  fi
 
-  export AWS_DEFAULT_PROFILE=$1
-  export AWS_PROFILE=$1
+  echo "Insert the credentials when asked."
+  asp "$1" || return 1
+  AWS_PAGER="" aws iam create-access-key
+  AWS_PAGER="" aws configure --profile "$1"
+
+  echo "You can now safely delete the old access key running \`aws iam delete-access-key --access-key-id ID\`"
+  echo "Your current keys are:"
+  AWS_PAGER="" aws iam list-access-keys
+}
 
-  export RPROMPT="<aws:$AWS_PROFILE>$rprompt"
+function aws_profiles() {
+  [[ -r "${AWS_CONFIG_FILE:-$HOME/.aws/config}" ]] || return 1
+  grep --color=never -Eo '\[.*\]' "${AWS_CONFIG_FILE:-$HOME/.aws/config}" | sed -E 's/^[[:space:]]*\[(profile)?[[:space:]]*([-_[:alnum:]\.@]+)\][[:space:]]*$/\2/g'
 }
 
-function aws_profiles {
-  reply=($(grep profile "${AWS_CONFIG_FILE:-$HOME/.aws/config}"|sed -e 's/.*profile \([a-zA-Z0-9_\.-]*\).*/\1/'))
+function _aws_profiles() {
+  reply=($(aws_profiles))
 }
-compctl -K aws_profiles asp
+compctl -K _aws_profiles asp acp aws_change_access_key
 
-if which aws_zsh_completer.sh &>/dev/null; then
-  _aws_zsh_completer_path=$(which aws_zsh_completer.sh 2>/dev/null)
-elif _homebrew-installed && _awscli-homebrew-installed; then
-  _aws_zsh_completer_path=$_brew_prefix/libexec/bin/aws_zsh_completer.sh
+# AWS prompt
+function aws_prompt_info() {
+  [[ -z $AWS_PROFILE ]] && return
+  echo "${ZSH_THEME_AWS_PREFIX:=<aws:}${AWS_PROFILE}${ZSH_THEME_AWS_SUFFIX:=>}"
+}
+
+if [[ "$SHOW_AWS_PROMPT" != false && "$RPROMPT" != *'$(aws_prompt_info)'* ]]; then
+  RPROMPT='$(aws_prompt_info)'"$RPROMPT"
 fi
 
-[ -n "$_aws_zsh_completer_path" ] && [ -x $_aws_zsh_completer_path ] && source $_aws_zsh_completer_path
-unset _aws_zsh_completer_path
+
+# Load awscli completions
+
+# AWS CLI v2 comes with its own autocompletion. Check if that is there, otherwise fall back
+if command -v aws_completer &> /dev/null; then
+  autoload -Uz bashcompinit && bashcompinit
+  complete -C aws_completer aws
+else
+  function _awscli-homebrew-installed() {
+    # check if Homebrew is installed
+    (( $+commands[brew] )) || return 1
+
+    # speculatively check default brew prefix
+    if [ -h /usr/local/opt/awscli ]; then
+      _brew_prefix=/usr/local/opt/awscli
+    else
+      # ok, it is not in the default prefix
+      # this call to brew is expensive (about 400 ms), so at least let's make it only once
+      _brew_prefix=$(brew --prefix awscli)
+    fi
+  }
+
+  # get aws_zsh_completer.sh location from $PATH
+  _aws_zsh_completer_path="$commands[aws_zsh_completer.sh]"
+
+  # otherwise check common locations
+  if [[ -z $_aws_zsh_completer_path ]]; then
+    # Homebrew
+    if _awscli-homebrew-installed; then
+      _aws_zsh_completer_path=$_brew_prefix/libexec/bin/aws_zsh_completer.sh
+    # Ubuntu
+    elif [[ -e /usr/share/zsh/vendor-completions/_awscli ]]; then
+      _aws_zsh_completer_path=/usr/share/zsh/vendor-completions/_awscli
+    # NixOS
+    elif [[ -e "${commands[aws]:P:h:h}/share/zsh/site-functions/aws_zsh_completer.sh" ]]; then
+      _aws_zsh_completer_path="${commands[aws]:P:h:h}/share/zsh/site-functions/aws_zsh_completer.sh"
+    # RPM
+    else
+      _aws_zsh_completer_path=/usr/share/zsh/site-functions/aws_zsh_completer.sh
+    fi
+  fi
+
+  [[ -r $_aws_zsh_completer_path ]] && source $_aws_zsh_completer_path
+  unset _aws_zsh_completer_path _brew_prefix
+fi