add haskell_stack prompt segment (#535)

README.md

@@ -281,6 +281,7 @@ enable as many segments as you like. It won't slow down your prompt or Zsh start
 | `jenv` | java environment from [jenv](https://github.com/jenv/jenv) |
 | `plenv` | perl environment from [plenv](https://github.com/tokuhirom/plenv) |
 | `phpenv` | php environment from [phpenv](https://github.com/phpenv/phpenv) |
+| `haskell_stack` | haskell version from [stack](https://haskellstack.org/) |
 | `node_version` | [node.js](https://nodejs.org/) version |
 | `go_version` | [go](https://golang.org) version |
 | `rust_version` | [rustc](https://www.rust-lang.org) version |

config/p10k-classic.zsh

@@ -72,6 +72,7 @@
     jenv                    # java version from jenv (https://github.com/jenv/jenv)
     plenv                   # perl version from plenv (https://github.com/tokuhirom/plenv)
     phpenv                  # php version from phpenv (https://github.com/phpenv/phpenv)
+    haskell_stack           # haskell version from stack (https://haskellstack.org/)
     kubecontext             # current kubernetes context (https://kubernetes.io/)
     terraform               # terraform workspace (https://www.terraform.io)
     aws                     # aws profile (https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html)
@@ -1061,6 +1062,20 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_PHPENV_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  ##########[ haskell_stack: haskell version from stack (https://haskellstack.org/) ]###########
+  # Haskell color.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_FOREGROUND=172
+  # Hide haskell version if it doesn't come from one of these sources.
+  #
+  #   shell:  version is set by STACK_YAML
+  #   local:  version is set by stack.yaml up the directory tree
+  #   global: version is set by the implicit global project (~/.stack/global-project/stack.yaml)
+  typeset -g POWERLEVEL9K_HASKELL_STACK_SOURCES=(shell local)
+  # If set to false, hide haskell version if it's the same as in the implicit global project.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_ALWAYS_SHOW=true
+  # Custom icon.
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
+
   ################[ terraform: terraform workspace (https://www.terraform.io) ]#################
   # POWERLEVEL9K_TERRAFORM_CLASSES is an array with even number of elements. The first element
   # in each pair defines a pattern against which the current terraform workspace gets matched.

config/p10k-lean-8colors.zsh

@@ -72,6 +72,7 @@
     jenv                    # java version from jenv (https://github.com/jenv/jenv)
     plenv                   # perl version from plenv (https://github.com/tokuhirom/plenv)
     phpenv                  # php version from phpenv (https://github.com/phpenv/phpenv)
+    haskell_stack           # haskell version from stack (https://haskellstack.org/)
     kubecontext             # current kubernetes context (https://kubernetes.io/)
     terraform               # terraform workspace (https://www.terraform.io)
     aws                     # aws profile (https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html)
@@ -1040,6 +1041,20 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_PHPENV_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  ##########[ haskell_stack: haskell version from stack (https://haskellstack.org/) ]###########
+  # Haskell color.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_FOREGROUND=3
+  # Hide haskell version if it doesn't come from one of these sources.
+  #
+  #   shell:  version is set by STACK_YAML
+  #   local:  version is set by stack.yaml up the directory tree
+  #   global: version is set by the implicit global project (~/.stack/global-project/stack.yaml)
+  typeset -g POWERLEVEL9K_HASKELL_STACK_SOURCES=(shell local)
+  # If set to false, hide haskell version if it's the same as in the implicit global project.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_ALWAYS_SHOW=true
+  # Custom icon.
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
+
   #############[ 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

@@ -72,6 +72,7 @@
     jenv                    # java version from jenv (https://github.com/jenv/jenv)
     plenv                   # perl version from plenv (https://github.com/tokuhirom/plenv)
     phpenv                  # php version from phpenv (https://github.com/phpenv/phpenv)
+    haskell_stack           # haskell version from stack (https://haskellstack.org/)
     kubecontext             # current kubernetes context (https://kubernetes.io/)
     terraform               # terraform workspace (https://www.terraform.io)
     aws                     # aws profile (https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html)
@@ -1040,6 +1041,20 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_PHPENV_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  ##########[ haskell_stack: haskell version from stack (https://haskellstack.org/) ]###########
+  # Haskell color.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_FOREGROUND=172
+  # Hide haskell version if it doesn't come from one of these sources.
+  #
+  #   shell:  version is set by STACK_YAML
+  #   local:  version is set by stack.yaml up the directory tree
+  #   global: version is set by the implicit global project (~/.stack/global-project/stack.yaml)
+  typeset -g POWERLEVEL9K_HASKELL_STACK_SOURCES=(shell local)
+  # If set to false, hide haskell version if it's the same as in the implicit global project.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_ALWAYS_SHOW=true
+  # Custom icon.
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
+
   #############[ 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

@@ -72,6 +72,7 @@
     jenv                    # java version from jenv (https://github.com/jenv/jenv)
     plenv                   # perl version from plenv (https://github.com/tokuhirom/plenv)
     phpenv                  # php version from phpenv (https://github.com/phpenv/phpenv)
+    haskell_stack           # haskell version from stack (https://haskellstack.org/)
     kubecontext             # current kubernetes context (https://kubernetes.io/)
     terraform               # terraform workspace (https://www.terraform.io)
     aws                     # aws profile (https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html)
@@ -1114,6 +1115,22 @@
   # Custom icon.
   # typeset -g POWERLEVEL9K_PHPENV_VISUAL_IDENTIFIER_EXPANSION='⭐'
 
+  ##########[ haskell_stack: haskell version from stack (https://haskellstack.org/) ]###########
+  # Haskell color.
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_FOREGROUND=0
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_BACKGROUND=3
+
+  # Hide haskell version if it doesn't come from one of these sources.
+  #
+  #   shell:  version is set by STACK_YAML
+  #   local:  version is set by stack.yaml up the directory tree
+  #   global: version is set by the implicit global project (~/.stack/global-project/stack.yaml)
+  typeset -g POWERLEVEL9K_HASKELL_STACK_SOURCES=(shell local)
+  # If set to false, hide haskell version if it's the same as in the implicit global project.
+  typeset -g POWERLEVEL9K_HASKELL_STACK_ALWAYS_SHOW=true
+  # Custom icon.
+  # typeset -g POWERLEVEL9K_HASKELL_STACK_VISUAL_IDENTIFIER_EXPANSION='⭐'
+
   ################[ terraform: terraform workspace (https://www.terraform.io) ]#################
   # POWERLEVEL9K_TERRAFORM_CLASSES is an array with even number of elements. The first element
   # in each pair defines a pattern against which the current terraform workspace gets matched.

internal/icons.zsh

@@ -138,6 +138,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    'elixir'
         POSTGRES_ICON                  'postgres'
         PHP_ICON                       'php'
+        HASKELL_ICON                   'hs'
       )
     ;;
     'awesome-fontconfig')
@@ -261,6 +262,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    'elixir'
         POSTGRES_ICON                  'postgres'
         PHP_ICON                       'php'
+        HASKELL_ICON                   'hs'
       )
     ;;
     'awesome-mapped-fontconfig')
@@ -387,6 +389,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    'elixir'
         POSTGRES_ICON                  'postgres'
         PHP_ICON                       'php'
+        HASKELL_ICON                   'hs'
       )
     ;;
     'nerdfont-complete'|'nerdfont-fontconfig')
@@ -511,6 +514,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    '\uE62D'               # 
         POSTGRES_ICON                  '\uE76E'               # 
         PHP_ICON                       '\uE608'               # 
+        HASKELL_ICON                   '\uE61F'               # 
       )
     ;;
     ascii)
@@ -632,6 +636,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    'elixir'
         POSTGRES_ICON                  'postgres'
         PHP_ICON                       'php'
+        HASKELL_ICON                   'hs'
       )
     ;;
     *)
@@ -755,6 +760,7 @@ function _p9k_init_icons() {
         ELIXIR_ICON                    'elixir'
         POSTGRES_ICON                  'postgres'
         PHP_ICON                       'php'
+        HASKELL_ICON                   'hs'
       )
     ;;
   esac

internal/p10k.zsh

@@ -4968,6 +4968,55 @@ _p9k_prompt_asdf_init() {
   typeset -g "_p9k__segment_cond_${_p9k__prompt_side}[_p9k__segment_index]"='${commands[asdf]:-${${+functions[asdf]}:#0}}'
 }
 
+_p9k_haskell_stack_version() {
+  if ! _p9k_cache_stat_get $0 $1 ${STACK_ROOT:-~/.stack}/{pantry/pantry.sqlite3,stack.sqlite3}; then
+    local v
+    v="$(STACK_YAML=$1 stack \
+      --silent                 \
+      --no-install-ghc         \
+      --skip-ghc-check         \
+      --no-terminal            \
+      --color=never            \
+      --lock-file=read-only    \
+      query compiler actual)" || v=
+    _p9k_cache_stat_set "$v"
+  fi
+  _p9k__ret=$_p9k__cache_val[1]
+}
+
+prompt_haskell_stack() {
+  if [[ -n $STACK_YAML ]]; then
+    (( ${_POWERLEVEL9K_HASKELL_STACK_SOURCES[(I)shell]} )) || return
+    _p9k_haskell_stack_version $STACK_YAML
+  else
+    (( ${_POWERLEVEL9K_HASKELL_STACK_SOURCES[(I)local|global]} )) || return
+    if _p9k_upglob stack.yaml; then
+      (( _POWERLEVEL9K_HASKELL_STACK_PROMPT_ALWAYS_SHOW )) || return
+      (( ${_POWERLEVEL9K_HASKELL_STACK_SOURCES[(I)global]} )) || return
+      _p9k_haskell_stack_version ${STACK_ROOT:-~/.stack}/global-project/stack.yaml
+    else
+      local -i idx=$?
+      (( ${_POWERLEVEL9K_HASKELL_STACK_SOURCES[(I)local]} )) || return
+      _p9k_haskell_stack_version $_p9k__parent_dirs[idx]/stack.yaml
+    fi
+  fi
+
+  [[ -n $_p9k__ret ]] || return
+
+  local v=$_p9k__ret
+
+  if (( !_POWERLEVEL9K_HASKELL_STACK_PROMPT_ALWAYS_SHOW )); then
+    _p9k_haskell_stack_version ${STACK_ROOT:-~/.stack}/global-project/stack.yaml
+    [[ $v == $_p9k__ret ]] && return
+  fi
+
+  _p9k_prompt_segment "$0" "yellow" "$_p9k_color1" 'HASKELL_ICON' 0 '' "${v//\%/%%}"
+}
+
+_p9k_prompt_haskell_stack_init() {
+  typeset -g "_p9k__segment_cond_${_p9k__prompt_side}[_p9k__segment_index]"='$commands[stack]'
+}
+
 # Use two preexec hooks to survive https://github.com/MichaelAquilina/zsh-you-should-use with
 # YSU_HARDCORE=1. See https://github.com/romkatv/powerlevel10k/issues/427.
 _p9k_preexec1() {
@@ -6609,6 +6658,8 @@ _p9k_init_params() {
   _p9k_declare -b POWERLEVEL9K_JAVA_VERSION_PROJECT_ONLY 0
   _p9k_declare -b POWERLEVEL9K_RBENV_PROMPT_ALWAYS_SHOW 0
   _p9k_declare -a POWERLEVEL9K_RBENV_SOURCES -- shell local global
+  _p9k_declare -b POWERLEVEL9K_HASKELL_STACK_PROMPT_ALWAYS_SHOW 1
+  _p9k_declare -a POWERLEVEL9K_HASKELL_STACK_SOURCES -- shell local
   _p9k_declare -b POWERLEVEL9K_PHPENV_PROMPT_ALWAYS_SHOW 0
   _p9k_declare -a POWERLEVEL9K_PHPENV_SOURCES -- shell local global
   _p9k_declare -b POWERLEVEL9K_LUAENV_PROMPT_ALWAYS_SHOW 0
@@ -7286,7 +7337,7 @@ _p9k_must_init() {
     [[ $sig == $_p9k__param_sig ]] && return 1
     _p9k_deinit
   fi
-  _p9k__param_pat=$'v64\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
+  _p9k__param_pat=$'v65\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
   _p9k__param_pat+=$'${#parameters[(I)POWERLEVEL9K_*]}\1${(%):-%n%#}\1$GITSTATUS_LOG_LEVEL\1'
   _p9k__param_pat+=$'$GITSTATUS_ENABLE_LOGGING\1$GITSTATUS_DAEMON\1$GITSTATUS_NUM_THREADS\1'
   _p9k__param_pat+=$'$DEFAULT_USER\1${ZLE_RPROMPT_INDENT:-1}\1$P9K_SSH\1$__p9k_ksh_arrays'