Replace references to /bin/bash with /usr/bin/env bash (#4478)

Makefile.envs

@@ -14,7 +14,7 @@ export SYSCONFIG_NAME=_sysconfigdata_$(CPYTHON_ABI_FLAGS)_emscripten_$(PLATFORM_
 # environment variables. The next line instructs make to use bash to run each
 # command.
 export BASH_ENV := $(PYODIDE_ROOT)/pyodide_env.sh
-SHELL := /bin/bash
+SHELL := /usr/bin/env bash
 
 version_tmp_1 := $(subst ., ,$(PYVERSION:v%=%))
 # Handle alpha, beta, and release candidate versions

packages/libf2c/extras/make.inc

@@ -7,7 +7,7 @@
 #
 # See the INSTALL/ directory for more examples.
 #
-SHELL = /bin/sh
+SHELL = /usr/bin/env sh
 #
 #  The machine (platform) identifier to append to the library names
 #

packages/opencv-python/extras/build_args.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 export CMAKE_ARGS=" \
 -DPYTHON3_INCLUDE_PATH=$PYTHONINCLUDE \

pyodide-build/pyodide_build/out_of_tree/venv.py

@@ -192,7 +192,7 @@ def create_pyodide_script(venv_bin: Path) -> None:
     pyodide_path.write_text(
         dedent(
             f"""
-            #!/bin/sh
+            #!/usr/bin/env bash
             PATH="{PATH}:$PATH" PYODIDE_ROOT='{PYODIDE_ROOT}' exec {original_pyodide_cli} "$@"
             """
         )

pyodide_env.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # get the absolute path of the root folder
 # shellcheck disable=SC2164

src/templates/python

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 ":" /* << "EOF"
 This file is a bash/node polyglot. This is needed for a few reasons:
 

tools/buildf2c

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 # Based on http://hpc.sourceforge.net/buildf2c with curl replaced by wget