initial dotfiles

zsh/custom/themes/bira-nerd.zsh-theme

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+# bira-nerd: Clean Bira-style 2-line prompt with Nerd icons
+# Line 1 (left):  user@host, cwd, git, pyenv, venv
+# Line 1 (right): (venv) time duration exit code
+# Line 2:         ╰─$ (root gets #)
+# No extra blank lines. No column-width hacks.
+
+setopt prompt_subst
+
+########################################
+# Helpers
+########################################
+
+# Git: branch + dirty/clean
+_bira_nerd_git() {
+  command git rev-parse --is-inside-work-tree &>/dev/null || return
+
+  local branch dirty
+  branch=$(
+    command git symbolic-ref --quiet --short HEAD 2>/dev/null ||
+    command git rev-parse --short HEAD 2>/dev/null
+  ) || return
+
+  if ! command git diff --quiet --ignore-submodules --cached 2>/dev/null ||
+     ! command git diff --quiet --ignore-submodules 2>/dev/null; then
+    dirty="%F{red}%f"
+  else
+    dirty="%F{green}%f"
+  fi
+
+  echo "%F{yellow}%f ${branch} ${dirty}"
+}
+
+# pyenv: show active version if not "system"
+_bira_nerd_pyenv() {
+  command -v pyenv &>/dev/null || return
+  local v
+  v=$(pyenv version-name 2>/dev/null) || return
+  [[ -n "$v" && "$v" != "system" ]] || return
+  echo " ${v}"
+}
+
+########################################
+# Timing
+########################################
+
+preexec() {
+  BIRA_NERD_START=$EPOCHREALTIME
+}
+
+########################################
+# precmd: build first line (no printing)
+########################################
+
+precmd() {
+  local left git_info pyenv_info vp
+
+  # Start with top-left glyph
+  left="╭─"
+
+  # conda (if available)
+  if (( $+functions[conda_prompt_info] )); then
+    left+="$(conda_prompt_info)"
+  fi
+
+  # user@host with icon (includes trailing space)
+  local user_host="%B%(!.%F{red}.%F{green}) %n@%m%f%b "
+  # cwd with folder icon (no trailing space)
+  local current_dir="%B%F{blue} %~%f%b"
+
+  left+="${user_host}${current_dir}"
+
+  # git info
+  git_info="$(_bira_nerd_git)"
+  [[ -n "$git_info" ]] && left+=" ${git_info}"
+
+  # pyenv info
+  pyenv_info="$(_bira_nerd_pyenv)"
+  [[ -n "$pyenv_info" ]] && left+=" %F{magenta}${pyenv_info}%f"
+
+  # left-side venv (oh-my-zsh virtualenv plugin, if present)
+  if (( $+functions[virtualenv_prompt_info] )); then
+    vp="$(virtualenv_prompt_info)"
+    [[ -n "$vp" ]] && left+=" ${vp}"
+  fi
+
+  # ---------- RIGHT SIDE SEGMENTS ----------
+
+  local -a right_parts
+
+  # (venv) from raw $VIRTUAL_ENV on the right
+  if [[ -n "$VIRTUAL_ENV" ]]; then
+    right_parts+=( "%F{magenta}(${VIRTUAL_ENV:t})%f" )
+  fi
+
+  # time
+  right_parts+=( "%F{242}%D{%H:%M:%S}%f" )
+
+  # duration of last command
+  if [[ -n "$BIRA_NERD_START" ]]; then
+    local diff secs ms
+    diff=$(( EPOCHREALTIME - BIRA_NERD_START ))
+    secs=${diff%.*}
+    ms=${diff#*.}
+    if (( secs > 0 )); then
+      right_parts+=( "%F{33}${secs}s%f" )
+    else
+      right_parts+=( "%F{33}${ms:0:2}ms%f" )
+    fi
+  fi
+
+  # exit code (only when non-zero)
+  right_parts+=( "%(?..%F{red}%?↵%f)" )
+
+  # Join right segments with single spaces
+  local right="${(j: :)right_parts}"
+
+  # Final first line: left + ONE space + right
+  BIRA_NERD_LINE1="${left} ${right}"
+
+  # reset timer
+  BIRA_NERD_START=""
+}
+
+########################################
+# Two-line prompt
+########################################
+
+PROMPT='${BIRA_NERD_LINE1}
+╰─%B%(!.#.$)%b '
+RPROMPT=''
+