feat(context): allow context setting where possible

relates to #2776

src/shell/scripts/omp.bash

@@ -12,6 +12,11 @@ function _omp_start_timer() {
     ::OMP:: get millis
 }
 
+# template function for context loading
+function set_poshcontext() {
+    return
+}
+
 function _omp_hook() {
     local ret=$?
     local omp_stack_count=$((${#DIRSTACK[@]} - 1))
@@ -21,6 +26,7 @@ function _omp_hook() {
         omp_elapsed=$((omp_now-omp_start_time))
         omp_start_time=""
     fi
+    set_poshcontext
     PS1="$(::OMP:: print primary --config="$POSH_THEME" --shell=bash --shell-version="$BASH_VERSION" --error="$ret" --execution-time="$omp_elapsed" --stack-count="$omp_stack_count" | tr -d '\0')"
     return $ret
 }

src/shell/scripts/omp.fish

@@ -4,6 +4,11 @@ set --global CONDA_PROMPT_MODIFIER false
 set --global omp_tooltip_command ""
 set --global omp_transient 0
 
+# template function for context loading
+function set_poshcontext
+  return
+end
+
 function fish_prompt
     set --local omp_status_cache_temp $status
     # clear from cursor to end of screen as
@@ -28,7 +33,7 @@ function fish_prompt
     if set --query status_generation
       set --global --export omp_last_status_generation $status_generation
     end
-
+    set_poshcontext
     ::OMP:: print primary --config $POSH_THEME --shell fish --error $omp_status_cache --execution-time $omp_duration --stack-count $omp_stack_count --shell-version $FISH_VERSION
 end
 
@@ -94,6 +99,8 @@ end
 
 # legacy functions
 function enable_poshtooltips
+  return
 end
 function enable_poshtransientprompt
+  return
 end

src/shell/scripts/omp.zsh

@@ -5,6 +5,11 @@ export CONDA_PROMPT_MODIFIER=false
 # set secondary prompt
 PS2="$(::OMP:: print secondary --config="$POSH_THEME" --shell=zsh)"
 
+# template function for context loading
+function set_poshcontext() {
+  return
+}
+
 function prompt_ohmyposh_preexec() {
   omp_start_time=$(::OMP:: get millis)
 }
@@ -17,6 +22,7 @@ function prompt_ohmyposh_precmd() {
     omp_now=$(::OMP:: get millis --shell=zsh)
     omp_elapsed=$(($omp_now-$omp_start_time))
   fi
+  set_poshcontext
   eval "$(::OMP:: print primary --config="$POSH_THEME" --error="$omp_last_error" --execution-time="$omp_elapsed" --stack-count="$omp_stack_count" --eval --shell=zsh --shell-version="$ZSH_VERSION")"
   unset omp_start_time
   unset omp_now

website/docs/configuration/templates.mdx

@@ -4,6 +4,9 @@ title: Templates
 sidebar_label: Templates
 ---
 
+import Tabs from "@theme/Tabs";
+import TabItem from "@theme/TabItem";
+
 Every segment has a `template` property to tweak the text that is displayed.
 Under the hood, this uses go's [text/template][go-text-template] feature extended with [sprig][sprig] and
 offers a few standard properties to work with.
@@ -31,8 +34,20 @@ offers a few standard properties to work with.
 | `.Env.VarName` | `string` | Any environment variable where `VarName` is the environment variable name |
 
 :::tip
-If you're using PowerShell, you can override a function to populate environment variables before the
+For the shells below, you can override a function to execute some logic before the prompt is rendered.
-prompt is rendered.
+This can be used to for example populate an environment variable with a specific context.
+
+<Tabs
+  defaultValue="powershell"
+  groupId="shell"
+  values={[
+    { label: 'powershell', value: 'powershell', },
+    { label: 'zsh', value: 'zsh', },
+    { label: 'bash', value: 'bash', },
+    { label: 'fish', value: 'fish', },
+  ]
+}>
+<TabItem value="powershell">
 
 ```powershell
 function Set-EnvVar {
@@ -41,6 +56,36 @@ function Set-EnvVar {
 New-Alias -Name 'Set-PoshContext' -Value 'Set-EnvVar' -Scope Global -Force
 ```
 
+</TabItem>
+<TabItem value="zsh">
+
+```bash
+function set_poshcontext() {
+    export POSH=$(date)
+}
+```
+
+</TabItem>
+<TabItem value="bash">
+
+```bash
+function set_poshcontext() {
+    export POSH=$(date)
+}
+```
+
+</TabItem>
+<TabItem value="fish">
+
+```shell
+function set_poshcontext
+  set --export POSH $(date)
+end
+```
+
+</TabItem>
+</Tabs>
+
 :::
 
 ## Template logic