miniforge3: wrong sbang replacement (#47178)

var/spack/repos/builtin/packages/miniforge3/package.py

@@ -56,6 +56,21 @@ def install(self, spec, prefix):
         bash = which("bash")
         bash(script, "-b", "-f", "-p", self.prefix)
 
+    @run_after("install")
+    def patch_sbang(self):
+        # Conda replaces the full path to the Python executable with `/usr/bin/env python`
+        # if the full path exceeds 127 characters. This does however break `conda deactivate`
+        # because the wrong Python interpreter is used after activating an environment.
+        # The 127 character limit is not relevant in Spack as Spack will automatically
+        # use the `sbang` script to deal with the overly long sbang line.
+        filter_file(
+            r"#!/usr/bin/env python", rf"#!{self.prefix.bin.python}", self.prefix.bin.conda
+        )
+        if "+mamba" in self.spec:
+            filter_file(
+                r"#!/usr/bin/env python", rf"#!{self.prefix.bin.python}", self.prefix.bin.mamba
+            )
+
     def setup_run_environment(self, env):
         filename = self.prefix.etc.join("profile.d").join("conda.sh")
         env.extend(EnvironmentModifications.from_sourcing_file(filename))