[nu] finally got a good starting point for daily nu use

.config/nu/conda/conda.nu

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+def conda-env [env-name: string] {
+    let conda-info = (conda info --envs --json | from json)
+    # had to remove extra "envs" dir
+    # let suffix = (if $env-name == "base" {""} {(["envs" $env-name] | path join)})
+    let suffix = (if $env-name == "base" {""} {($env-name | path expand)})
+    # use custom env dir, hard-coded to choose XDG-based path
+    # let env-dir = ([$conda-info.root_prefix $suffix] | path join)
+    let env-prefix = ($conda-info.envs_dirs | where ('.config' in $it) | path expand)
+    let env-dir = ([$env-prefix $suffix] | path join)
+    let old-path = ($nu.path | str collect (path-sep))
+    let new-path = (if (windows?) { (conda-create-path-windows $env-dir) } { (conda-create-path-unix $env-dir) })
+    let new-env = [[name, value];
+                   [CONDA_DEFAULT_ENV $env-name]
+                   [CONDA_PREFIX $env-dir]
+                   [CONDA_PROMPT_MODIFIER $"[($env-name)]"]
+                   [CONDA_SHLVL "1"]
+                   [CONDA_OLD_PATH $old-path]]
+
+    $new-env | append $new-path
+}
+
+def conda-create-path-windows [env-dir] {
+    # 1. Conda on Windows needs a few additional Path elements
+    # 2. The path env var on Windows is called Path (not PATH)
+    let env-path = [
+        $env-dir
+        ([$env-dir "Scripts"] | path join)
+        ([$env-dir "Library" "mingw-w64"] | path join)
+        ([$env-dir "Library" "bin"] | path join)
+        ([$env-dir "Library" "usr" "bin"] | path join)
+    ]
+    let new-path = ([$env-path $nu.path] | flatten | str collect (path-sep))
+    [[name, value]; [Path $new-path]]
+}
+
+def conda-create-path-unix [env-dir] {
+    let env-path = [
+        ([$env-dir "bin"] | path join)
+    ]
+    let new-path = ([$env-path $nu.path] | flatten | str collect (path-sep))
+    [[name, value]; [PATH $new-path]]
+}
+
+def windows? [] {
+    (sys).host.name == "Windows"
+}
+
+def path-sep [] {
+    if (windows?) { ";" } { ":" }
+}
+
+# find/return a conda env with the same name as the current directory
+def conda-env-pwd [] {
+    pwd | path basename | each { conda-env $it }
+}
+
+# This will stream out a conda env, so you should pipe it into `load-env`,
+# e.g. `goto-conda-env my-env-name | load-env`
+def goto-conda-env [
+    env-name: string  # approx name of the dir your conda env is named after (approx because `z` is used to jump there)
+] {
+    z $env-name
+    conda-env-pwd
+}

.config/nu/conda/conda_deactivate.nu

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+def conda-deactivate [] {
+	let-env PATH = $nu.env.CONDA_OLD_PATH
+	unlet-env CONDA_PROMPT_MODIFIER
+	unlet-env CONDA_PREFIX
+	unlet-env CONDA_SHLVL
+	unlet-env CONDA_DEFAULT_ENV
+	unlet-env CONDA_OLD_PATH
+}
+

.config/nu/conda/conda_deactivate_script.nu

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+let-env PATH = $nu.env.CONDA_OLD_PATH
+unlet-env CONDA_PROMPT_MODIFIER
+unlet-env CONDA_PREFIX
+unlet-env CONDA_SHLVL
+unlet-env CONDA_DEFAULT_ENV
+unlet-env CONDA_OLD_PATH

.config/nu/config.toml

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+path = [
+  "/Users/pakelley/.local/share/.../bin",
+  "/Users/pakelley/.config/doom-emacs/bin",
+]
+prompt = "\n$nu.env.CMD_DURATION_MS\nstarship prompt"
+startup = [
+  "zoxide init nushell --hook prompt | save ~/.zoxide.nu",
+  "source ~/.zoxide.nu",
+  "source fuzzy/fzf.nu",
+  "source conda/conda.nu",
+  "source conda/conda_deactivate.nu",
+]
+
+[env]
+STARSHIP_SHELL = "nushell"
+
+[line_editor]
+auto_add_history = true
+bell_style = "audible"
+color_mode = "enabled"
+completion_prompt_limit = 10
+completion_type = "fuzzy"
+edit_mode = "vi"
+history_duplicates = "alwaysadd"
+history_ignore_space = true
+keyseq_timeout_ms = 500
+max_history_size = 1000
+tab_stop = 4

.config/nu/fuzzy/fzf.nu

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+# fzf through shell history, typing result.
+# Requires `xdotool`.
+# To configure on iTerm, make a keybinding (presumably for C-r) whose action is "Send text with vim special chars",
+#    and use: \u0001fzf-history --query="\u0005"\u000d
+#    where \u0001 is for the start of a line, \u0005 is the end of a line, and \u000d is RET
+def fzf-history [
+	--query (-q): string # Optionally start with given query.
+] {
+    let cmd = (history | uniq | reverse | each { echo [$it (char nl)] } | str collect | fzf --query $"($query)")
+	osascript -e $'tell application "System Events" to keystroke "($cmd)"'
+}