Honor PS1_GIT for hawolex

.context.json

@@ -432,6 +432,7 @@
     "On macOS, installer is per-user and sources from .bashrc/.bash_profile.",
     "Seasonal palettes and contest pack are now documented directly in main.",
     "README uses images/bash-pallete.png.",
-    "Git capsule prefers __git_ps1 and falls back to git symbolic-ref/short hash when git-prompt is unavailable or returns empty."
+    "Git capsule prefers __git_ps1 and falls back to git symbolic-ref/short hash when git-prompt is unavailable or returns empty.",
+    "Hawolex git capsule enables when PS1_GIT=1 or __PS1_GIT=1."
   ]
 }

dotfiles/ps1/ps1.sh

@@ -641,7 +641,8 @@ ${G_Z2_BG}${G_Z2_FG} ${HOST_PART}${PATH_SEP}${G_PATH_FG}${PATH_PART}${G_END_PAD}
       local H_LEFT_FG="\[\e[38;5;54m\]"
       local H_RIGHT_FG="\[\e[38;5;31m\]"
       local H_GIT=""
-      if [[ "$__PS1_GIT" == "1" ]]; then
+      local H_GIT_ON="${PS1_GIT:-$__PS1_GIT}"
+      if [[ "$H_GIT_ON" == "1" ]]; then
         export GIT_PS1_SHOWDIRTYSTATE=1
         export GIT_PS1_SHOWSTASHSTATE=1
         export GIT_PS1_SHOWUNTRACKEDFILES=1