shell: use /usr/bin/env instead of absolute paths

This commit changes the shebang in all shell scripts from absolute
paths (such as `/bin/bash` or `/usr/bin/python3`) to the `/usr/bin/env`
binary with the accompanying interpreter as it's argument.

The reason for this are as follows:
- NixOS cannot work with absolute paths
- BSD systems install their packages in /usr/local/bin

crates/tor-rtcompat/misc/matrix

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Run a provided command over all possible subsets of important
 # tor-rtcompat features.

maint/add_warning

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import argparse
 import fnmatch

maint/adhoc-add-lint-blocks

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -i -p
+#!/usr/bin/env perl -i -p
 
 # adhoc script for adding lint blocks to mod test everywhere
 #

maint/binary_size

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # binary_size: Build arti with a given set of options, and
 # dump the binary size in a json format.

maint/cargo_audit

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Run "cargo audit" with an appropriate set of flags.
 

maint/cargo_check_target

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/cargo_sort

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Run "cargo sort" to check that the Cargo.tomls are sorted
 

maint/changed_crates

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/check_doc_features

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import os
 from list_crates import crate_list

maint/check_licenses

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/check_toposort

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 #
 # Helper script: makes sure that the crates as listed in Cargo.toml are
 # topologically sorted from lowest-level to highest level.

maint/check_tree

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Use cargo-tree to check our dependencies for crates which we must
 # not depend on unconditionally.

maint/ci_log_span

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # usage: $0 <start|end> <section_identifier+config> "<human section name>"
 # eg: $0 start 'my_section[collapsed=true]' "My collapsed section"

maint/coverage

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 function usage()
 {

maint/coverage_fuzz_corpora

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/crate_versions

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # List the current version of every crate.
 

maint/docker_reproducible_build

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # This script runs as the top level of our reproducible build process.
 # It launches the actual build script inside a docker container.

maint/downgrade_dependencies

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Downgrades every one of our dependencies in Cargo.lock to the
 # earliest version listed in our Cargo.toml files.  (And then

maint/fuzz_it_all

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/gen_md_links

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 """
 Given some markdown text of the general kind we use in Arti changelogs,

maint/hooks/pre-commit

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/hooks/pre-push

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/list_crates

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # List our crates as they appear in Cargo.toml.  Useful for scripting.
 

maint/matrix_test

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import toml.decoder
 import sys

maint/matrix_test_cfg

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Run cargo check and cargo test with various featuresets relevant to configuration
 

maint/postprocess_coverage_cobertura

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Use BeautifulSoup to deduplicate functions in a grov XML (cobertura)
 # output file.

maint/postprocess_coverage_html

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Use BeautifulSoup to mangle a grov HTML output file and insert other
 # things we care about.

maint/preserve

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # This script is meant to preserve and restore CI artifacts so they can be passed from job to job.
 # See arti!786 for why it is done this way, and what could be done better.

maint/reproducible_build

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # This script is run inside a docker container as part of our
 # reproducible build process.

maint/shellcheck_all

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/stunt/fake-cc

@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/usr/bin/env sh
 # this is made to convince openssl-sys we have a working compiler for the target it wants
 echo RUST_VERSION_OPENSSL_0x101010efL

maint/thanks

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -euo pipefail
 
 if [ -z "${1-}" ]; then

maint/via-cargo-install-in-ci

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

maint/with_coverage

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 

tests/chutney/arti-bench

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -xeuo pipefail
 
 if [ -z "${RUST_LOG:-}" ]; then

tests/chutney/setup

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -xeuo pipefail
 

tests/chutney/stop-arti

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -xeuo pipefail
 
 cd "$(git rev-parse --show-toplevel)"

tests/chutney/teardown

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -xeuo pipefail
 
 cd "$(git rev-parse --show-toplevel)"

tests/chutney/test

@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/usr/bin/env bash 
 
 set -xeuo pipefail
 

tests/shadow/run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -xeuo pipefail