Merge pull request #31 from bertsky/bash-from-env

use bash from env instead of fixed path, check version

.travis.yml

@@ -1,3 +1,4 @@
+dist: bionic # need at least bash 4.4
 language: python
 cache:
   directories:

CHANGELOG.md

@@ -4,6 +4,11 @@ Versioned according to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+## 1.1.2
+
+  * Use bash from env instead of fixed shebang
+  * Ensure minimum bash version
+
 ## 1.1.1
 
 Changed:

ocrd-olena-binarize

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC2086
 
 set -eu
@@ -24,7 +24,8 @@ set -o pipefail
 # by inserting an AlternativeImage to the PAGE-XML.
 # Regardless, adds new image and new PAGE-XML to METS.
 
-which ocrd >/dev/null 2>/dev/null || { echo "ocrd not in \$PATH. Panicking"; exit 1; }
+which ocrd >/dev/null 2>/dev/null || { echo >&2 "ocrd not in \$PATH. Panicking"; exit 1; }
+((BASH_VERSINFO<4 || BASH_VERSINFO==4 && BASH_VERSINFO[1]<4)) && echo >&2 "bash $BASH_VERSION is too old. Please install bash 4.4 or newer." && exit 1
 
 SHAREDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
 FALLBACK_IMAGE_FILEGRP="OCR-D-IMG-BIN"

ocrd-tool.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.1.0",
+  "version": "1.1.2",
   "git_url": "https://github.com/OCR-D/ocrd_olena",
   "tools": {
     "ocrd-olena-binarize": {

test/test.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 export assets="$PWD/assets/data"
 export workspace_dir="/tmp/test-ocrd-olena-binarize"