add back zsh plugin direct fetch for termux

.chezmoiexternal.toml

@@ -1,16 +0,0 @@
-[".config/kitty/kitty-gruvbox-theme"]
-type = "archive"
-url = "https://github.com/wdomitrz/kitty-gruvbox-theme/archive/master.tar.gz"
-exact = false
-stripComponents = 1
-refreshPeriod = "168h"
-
-[".config/variety/plugins/verse.py"]
-type = "file"
-url = "https://raw.githubusercontent.com/Crissium/variety-daily-verse/master/verse.py"
-refreshPeriod = "168h"
-
-[".local/share/xxtools"]
-type = "git-repo"
-url = "https://github.com/Piraty/xxtools.git"
-refreshPeriod = "168h"

.chezmoiexternal.toml.tmpl

@@ -0,0 +1,38 @@
+[".config/kitty/kitty-gruvbox-theme"]
+type = "archive"
+url = "https://github.com/wdomitrz/kitty-gruvbox-theme/archive/master.tar.gz"
+exact = false
+stripComponents = 1
+refreshPeriod = "168h"
+
+[".config/variety/plugins/verse.py"]
+type = "file"
+url = "https://raw.githubusercontent.com/Crissium/variety-daily-verse/master/verse.py"
+refreshPeriod = "168h"
+
+[".local/share/xxtools"]
+type = "git-repo"
+url = "https://github.com/Piraty/xxtools.git"
+refreshPeriod = "168h"
+
+{{ if env "ANDROID_ROOT" }}
+# Termux doesn't package these zsh plugins individually (unlike our Linux
+# machines, which get them from Nix via home-manager), so fetch them directly.
+# dot_zshrc's plugin-sourcing loop already checks
+# "$HOME/.local/share/$plugin/$plugin.zsh", which is exactly where a plain
+# git clone of each plugin's repo puts the file we need.
+[".local/share/zsh-autosuggestions"]
+type = "git-repo"
+url = "https://github.com/zsh-users/zsh-autosuggestions.git"
+refreshPeriod = "168h"
+
+[".local/share/zsh-syntax-highlighting"]
+type = "git-repo"
+url = "https://github.com/zsh-users/zsh-syntax-highlighting.git"
+refreshPeriod = "168h"
+
+[".local/share/zsh-history-substring-search"]
+type = "git-repo"
+url = "https://github.com/zsh-users/zsh-history-substring-search.git"
+refreshPeriod = "168h"
+{{ end }}