common(fix[version-checks]): thread tmux_bin through callsites in pane.py and hooks.py

why: Version-check callsites in capture_pane() and HooksMixin methods
query the system tmux instead of Server.tmux_bin, producing wrong
results when a custom binary is configured.
what:
- Add _tmux_bin property to HooksMixin to resolve tmux_bin from self
  or self.server
- Pass tmux_bin to has_lt_version() in 5 HooksMixin methods
- Pass self.server.tmux_bin to has_gte_version() in Pane.capture_pane()
- Fix test mock lambda to accept tmux_bin keyword argument

Author: tony

src/libtmux/hooks.py

@@ -70,6 +70,13 @@ def __init__(self, default_hook_scope: OptionScope | None) -> None:
         self.default_hook_scope = default_hook_scope
         self.hooks = Hooks()
 
+    @property
+    def _tmux_bin(self) -> str | None:
+        """Resolve tmux_bin from self (Server) or self.server (Session/Window/Pane)."""
+        return getattr(self, "tmux_bin", None) or getattr(
+            getattr(self, "server", None), "tmux_bin", None
+        )
+
     def run_hook(
         self,
         hook: str,
@@ -89,7 +96,7 @@ def run_hook(
             assert scope in HOOK_SCOPE_FLAG_MAP
 
             flag = HOOK_SCOPE_FLAG_MAP[scope]
-            if flag in {"-p", "-w"} and has_lt_version("3.2"):
+            if flag in {"-p", "-w"} and has_lt_version("3.2", tmux_bin=self._tmux_bin):
                 warnings.warn(
                     "Scope flag '-w' and '-p' requires tmux 3.2+. Ignoring.",
                     stacklevel=2,
@@ -168,7 +175,7 @@ def set_hook(
             assert scope in HOOK_SCOPE_FLAG_MAP
 
             flag = HOOK_SCOPE_FLAG_MAP[scope]
-            if flag in {"-p", "-w"} and has_lt_version("3.2"):
+            if flag in {"-p", "-w"} and has_lt_version("3.2", tmux_bin=self._tmux_bin):
                 warnings.warn(
                     "Scope flag '-w' and '-p' requires tmux 3.2+. Ignoring.",
                     stacklevel=2,
@@ -221,7 +228,7 @@ def unset_hook(
             assert scope in HOOK_SCOPE_FLAG_MAP
 
             flag = HOOK_SCOPE_FLAG_MAP[scope]
-            if flag in {"-p", "-w"} and has_lt_version("3.2"):
+            if flag in {"-p", "-w"} and has_lt_version("3.2", tmux_bin=self._tmux_bin):
                 warnings.warn(
                     "Scope flag '-w' and '-p' requires tmux 3.2+. Ignoring.",
                     stacklevel=2,
@@ -286,7 +293,7 @@ def show_hooks(
             assert scope in HOOK_SCOPE_FLAG_MAP
 
             flag = HOOK_SCOPE_FLAG_MAP[scope]
-            if flag in {"-p", "-w"} and has_lt_version("3.2"):
+            if flag in {"-p", "-w"} and has_lt_version("3.2", tmux_bin=self._tmux_bin):
                 warnings.warn(
                     "Scope flag '-w' and '-p' requires tmux 3.2+. Ignoring.",
                     stacklevel=2,
@@ -344,7 +351,7 @@ def _show_hook(
             assert scope in HOOK_SCOPE_FLAG_MAP
 
             flag = HOOK_SCOPE_FLAG_MAP[scope]
-            if flag in {"-p", "-w"} and has_lt_version("3.2"):
+            if flag in {"-p", "-w"} and has_lt_version("3.2", tmux_bin=self._tmux_bin):
                 warnings.warn(
                     "Scope flag '-w' and '-p' requires tmux 3.2+. Ignoring.",
                     stacklevel=2,

src/libtmux/pane.py

@@ -411,7 +411,7 @@ def capture_pane(
         if preserve_trailing:
             cmd.append("-N")
         if trim_trailing:
-            if has_gte_version("3.4"):
+            if has_gte_version("3.4", tmux_bin=self.server.tmux_bin):
                 cmd.append("-T")
             else:
                 warnings.warn(

tests/test_pane_capture_pane.py

@@ -453,7 +453,7 @@ def test_capture_pane_trim_trailing_warning(
     from libtmux import common
 
     # Mock has_gte_version to return False for 3.4
-    monkeypatch.setattr(common, "has_gte_version", lambda v: v != "3.4")
+    monkeypatch.setattr(common, "has_gte_version", lambda v, **kw: v != "3.4")
 
     pane = session.active_window.split(shell="sh")