Added async docker segment to display number of running, paused and exited containers.

README.md

@@ -297,6 +297,7 @@ enable as many segments as you like. It won't slow down your prompt or Zsh start
 | `laravel_version` | [laravel php framework](https://laravel.com/) version |
 | `java_version` | [java](https://www.java.com/) version |
 | `package` | `name@version` from [package.json](https://docs.npmjs.com/files/package.json) |
+| `docker` | current number of running and exited [docker](https://docker.io/) containers |
 | `kubecontext` | current [kubernetes](https://kubernetes.io/) context |
 | `terraform` | [terraform](https://www.terraform.io) workspace |
 | `aws` | [aws profile](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html) |

config/p10k-classic.zsh

@@ -100,6 +100,7 @@
     # battery               # internal battery
     # wifi                  # wifi speed
     # example               # example user-defined segment (see prompt_example function below)
+    # docker                # Docker containers running and exited (https://www.docker.io)
   )
 
   # Defines character set used by powerlevel10k. It's best to let `p10k configure` set it for you.
@@ -1192,6 +1193,12 @@
   typeset -g POWERLEVEL9K_TERRAFORM_OTHER_FOREGROUND=38
   # typeset -g POWERLEVEL9K_TERRAFORM_OTHER_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  #############[ docker: shows the whale when online, and the # running and exited containers (https://www.docker.io/) ]#############
+  # typeset -g POWERLEVEL9K_DOCKER_ICON='🐳'
+  # typeset -g POWERLEVEL9K_DOCKER_RUNNING_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_PAUSED_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_EXITED_ICON=''
+
   #############[ kubecontext: current kubernetes context (https://kubernetes.io/) ]#############
   # Show kubecontext only when the the command you are typing invokes one of these tools.
   # Tip: Remove the next line to always show kubecontext.

config/p10k-lean-8colors.zsh

@@ -99,6 +99,7 @@
     # battery               # internal battery
     # wifi                  # wifi speed
     # example               # example user-defined segment (see prompt_example function below)
+    # docker                # Docker containers running and exited (https://www.docker.io)
   )
 
   # Defines character set used by powerlevel10k. It's best to let `p10k configure` set it for you.
@@ -1140,6 +1141,12 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  #############[ docker: shows the whale when online, and the # running and exited containers (https://www.docker.io/) ]#############
+  # typeset -g POWERLEVEL9K_DOCKER_ICON='🐳'
+  # typeset -g POWERLEVEL9K_DOCKER_RUNNING_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_PAUSED_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_EXITED_ICON=''
+
   #############[ kubecontext: current kubernetes context (https://kubernetes.io/) ]#############
   # Show kubecontext only when the the command you are typing invokes one of these tools.
   # Tip: Remove the next line to always show kubecontext.

config/p10k-lean.zsh

@@ -99,6 +99,7 @@
     # battery               # internal battery
     # wifi                  # wifi speed
     # example               # example user-defined segment (see prompt_example function below)
+    # docker                # Docker containers running and exited (https://www.docker.io)
   )
 
   # Defines character set used by powerlevel10k. It's best to let `p10k configure` set it for you.
@@ -1136,6 +1137,12 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  #############[ docker: shows the whale when online, and the # running and exited containers (https://www.docker.io/) ]#############
+  # typeset -g POWERLEVEL9K_DOCKER_ICON='🐳'
+  # typeset -g POWERLEVEL9K_DOCKER_RUNNING_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_PAUSED_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_EXITED_ICON=''
+
   #############[ kubecontext: current kubernetes context (https://kubernetes.io/) ]#############
   # Show kubecontext only when the the command you are typing invokes one of these tools.
   # Tip: Remove the next line to always show kubecontext.

config/p10k-rainbow.zsh

@@ -100,6 +100,7 @@
     # battery               # internal battery
     # wifi                  # wifi speed
     # example               # example user-defined segment (see prompt_example function below)
+    # docker                # Docker containers running and exited (https://www.docker.io)
   )
 
   # Defines character set used by powerlevel10k. It's best to let `p10k configure` set it for you.
@@ -1258,6 +1259,12 @@
   typeset -g POWERLEVEL9K_TERRAFORM_OTHER_BACKGROUND=0
   # typeset -g POWERLEVEL9K_TERRAFORM_OTHER_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  #############[ docker: shows the whale when online, and the # running and exited containers (https://www.docker.io/) ]#############
+  # typeset -g POWERLEVEL9K_DOCKER_ICON='🐳'
+  # typeset -g POWERLEVEL9K_DOCKER_RUNNING_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_PAUSED_ICON=''
+  # typeset -g POWERLEVEL9K_DOCKER_EXITED_ICON=''
+
   #############[ kubecontext: current kubernetes context (https://kubernetes.io/) ]#############
   # Show kubecontext only when the the command you are typing invokes one of these tools.
   # Tip: Remove the next line to always show kubecontext.

internal/icons.zsh

@@ -144,6 +144,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   'pkg'
         JULIA_ICON                     'jl'
         SCALA_ICON                     'scala'
+        DOCKER_ICON                    '\UE7B0'
+        ONLINE_ICON                    '\UF111'
+        PAUSE_ICON                     '\UF04C'               # 
       )
     ;;
     'awesome-fontconfig')
@@ -272,6 +275,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   'pkg'
         JULIA_ICON                     'jl'
         SCALA_ICON                     'scala'
+        DOCKER_ICON                    '\UE7B0'
+        ONLINE_ICON                    '\UF111'
+        PAUSE_ICON                     '\UF04C'               # 
       )
     ;;
     'awesome-mapped-fontconfig')
@@ -403,6 +409,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   'pkg'
         JULIA_ICON                     'jl'
         SCALA_ICON                     'scala'
+        DOCKER_ICON                    '\UE7B0'
+        ONLINE_ICON                    '\UF111'
+        PAUSE_ICON                     '\UF04C'               # 
       )
     ;;
     'nerdfont-complete'|'nerdfont-fontconfig')
@@ -532,6 +541,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   '\uF8D6'               # 
         JULIA_ICON                     '\uE624'               # 
         SCALA_ICON                     '\uE737'               # 
+        DOCKER_ICON                    '\UE7B0'               # 
+        ONLINE_ICON                    '\UF111'               # 
+        PAUSE_ICON                     '\UF04C'               # 
       )
     ;;
     ascii)
@@ -658,6 +670,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   'pkg'
         JULIA_ICON                     'jl'
         SCALA_ICON                     'scala'
+        DOCKER_ICON                    'docker'
+        ONLINE_ICON                    'o'
+        PAUSE_ICON                     '"'
       )
     ;;
     *)
@@ -786,6 +801,9 @@ function _p9k_init_icons() {
         PACKAGE_ICON                   'pkg'
         JULIA_ICON                     'jl'
         SCALA_ICON                     'scala'
+        DOCKER_ICON                    '\UE7B0'
+        ONLINE_ICON                    '\UF111'
+        PAUSE_ICON                     '\UF04C'               # 
       )
     ;;
   esac

internal/p10k.zsh

@@ -1247,6 +1247,101 @@ function _p9k_fvm_new() {
   return 1
 }
 
+#####################################################################
+# Docker support - Appears if docker cli can talk to server.
+#                  Shows # running and # stopped containers.
+#
+# Also commented with instructions on how to write an async segment.
+#####################################################################
+# The main prompt_ function adds the prompt segment definitions, but
+# the data will be computed elsewhere.
+function prompt_docker() {
+  # Save the length for the last line
+  local -i len=$#_p9k__prompt _p9k__has_upglob
+
+  # Register the segments. Search for _p9k_left_prompt_segment for argument docs
+  _p9k_prompt_segment $0 NONE green DOCKER_ICON 1 '$_p9k__docker_segment' '$_p9k__docker_segment'
+
+  # Copy and paste this line; no changes needed.
+  (( _p9k__has_upglob )) || typeset -g "_p9k__segment_val_${_p9k__prompt_side}[_p9k__segment_index]"=$_p9k__prompt[len+1,-1]
+}
+
+# The _init function must be named according to the pattern seen here.
+function _p9k_prompt_docker_init() {
+  # Abort if the command isn't available.
+  (( $+commands[docker] )) || return
+
+  # Declare global variable to hold the segment content
+  typeset -g _p9k__docker_segment=
+
+  # Register this segment for async computation. Again note the pattern
+  _p9k__async_segments_compute+='_p9k_worker_invoke docker _p9k_prompt_docker_compute'
+}
+
+# Runs the workers
+function _p9k_prompt_docker_compute() {
+  (( $+commands[docker] )) || return
+
+  # Copy and paste this line. Follow the pattern and adapt for your segment name.
+  _p9k_worker_async _p9k_prompt_docker_async _p9k_prompt_docker_sync
+
+  # See the other invocations of _p9k_worker_async for examples of argument
+  # passing to the async impl. The sync impl should not take args.
+}
+
+# `_async` runs the slow processes and converts the output into variables.
+#
+# The content will then be rendered by the segment template that was previously
+# registered by the _p9k_prompt_segment in the `prompt_` function.
+#
+function _p9k_prompt_docker_async() {
+  (( $+commands[docker] )) || return
+
+  local -A container_status_counts
+  container_status_counts=(E 0 U 0 P 0)
+
+  # Minimize all use of subshells and command invocations in general.
+  # Async is not a license to be needlessly slow.
+  for line in ${(f)"$(command docker ps -a --format '{{ .Status }}' 2>/dev/null)"}; do
+    if [[ "$line" == *(Paused)* ]]; then
+      (( container_status_counts[P]++ ))
+    else
+      (( container_status_counts[${line:0:1}]++ ))
+    fi
+    _p9k__docker_up=1
+  done
+
+  _p9k__docker_segment=
+
+  _p9k_get_icon '' ONLINE_ICON
+  (( ${container_status_counts[U]} )) && \
+    _p9k__docker_segment="%F{green}${POWERLEVEL9K_DOCKER_RUNNING_ICON:-$_p9k__ret} ${container_status_counts[U]} %f"
+
+  _p9k_get_icon '' PAUSE_ICON
+  (( ${container_status_counts[P]} )) && \
+    _p9k__docker_segment+="%F{yellow}${POWERLEVEL9K_DOCKER_PAUSED_ICON:-$_p9k__ret} ${container_status_counts[P]} %f"
+
+  _p9k_get_icon '' FAIL_ICON
+  (( ${container_status_counts[E]} )) && \
+    _p9k__docker_segment+="%F{red}${POWERLEVEL9K_DOCKER_EXITED_ICON:-$_p9k__ret} ${container_status_counts[E]} %f"
+
+  # All vars that may have changed state must be sent to _p9k_print_params
+  _p9k_print_params     \
+    _p9k__docker_segment
+
+  # The function must end with a reset=value
+  echo -E - 'reset=1'
+}
+
+# Copy, paste, and rename this function.
+function _p9k_prompt_docker_sync() {
+  if [[ -n $REPLY ]]; then
+    eval $REPLY
+    _p9k_worker_reply $REPLY
+  fi
+}
+##########################################################################
+
 prompt_fvm() {
   _p9k_fvm_new || _p9k_fvm_old
 }