treewide: more portable bash shebangs

As in 2a5fcfae024ffc370bb780572279f45a1da3f946
and in 3e67e5c9928f8b1e1c5a63def88d53ed1fed12eb
using /usr/bin/env allows bash to be looked up in PATH
rather than being hard-coded.

As with the previous changes the same arguments apply
- distributions have scripts to rewrite shebangs on installation and
  they know what locations to rely on.
- For tests/compilation we should rather rely on the user to have setup
  there PATH correctly.

In particular this makes testing from git easier on NixOS where do not provide
/bin/bash to improve compose-ability.

4 files changed, 4 insertions, 4 deletions

diff --git a/tools/check-directives.sh b/tools/check-directives.sh
index a90fb604ae..1a0bb0995b 100755
--- a/tools/check-directives.sh
+++ b/tools/check-directives.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 which perl &>/dev/null || exit 77
diff --git a/tools/coverity.sh b/tools/coverity.sh
index 8edce065ca..5d3b7e2918 100755
--- a/tools/coverity.sh
+++ b/tools/coverity.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # The official unmodified version of the script can be found at
 # https://scan.coverity.com/scripts/travisci_build_coverity_scan.sh
diff --git a/tools/meson-vcs-tag.sh b/tools/meson-vcs-tag.sh
index 5dc95fa8c1..1c3814d483 100755
--- a/tools/meson-vcs-tag.sh
+++ b/tools/meson-vcs-tag.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -eu
 set -o pipefail
diff --git a/tools/oss-fuzz.sh b/tools/oss-fuzz.sh
index 5e48a7e0c6..79846f8787 100755
--- a/tools/oss-fuzz.sh
+++ b/tools/oss-fuzz.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: LGPL-2.1+
 
 set -ex