From 6666ec9cb956c26faefe25d414bd204bfd9d1794 Mon Sep 17 00:00:00 2001
From: Peter Surda <surda@economicsofbitcoin.com>
Date: Tue, 5 Jan 2021 09:52:34 +0100
Subject: [PATCH] Add travis2bash

---
 travis2bash.sh | 149 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100755 travis2bash.sh

diff --git a/travis2bash.sh b/travis2bash.sh
new file mode 100755
index 0000000..dd8d19e
--- /dev/null
+++ b/travis2bash.sh
@@ -0,0 +1,149 @@
+#!/usr/bin/env bash
+# implementation of .travis.yml execution using pure bash
+# limited functionality
+
+# shellcheck disable=SC1003
+
+# yaml.sh # pulled from
+# https://raw.githubusercontent.com/jasperes/bash-yaml/master/script/yaml.sh
+# Licensed under MIT license
+
+# Based on https://gist.github.com/pkuczynski/8665367
+
+failure=0
+
+parse_yaml() {
+    local yaml_file=$1
+    local prefix=$2
+    local s
+    local w
+    local fs
+
+    s='[[:space:]]*'
+    w='[a-zA-Z0-9_.-]*'
+    fs="$(echo @|tr @ '\034')"
+
+    (
+        sed -e '/- [^\“]'"[^\']"'.*: /s|\([ ]*\)- \([[:space:]]*\)|\1-\'$'\n''  \1\2|g' |
+
+        sed -ne '/^--/s|--||g; s|\"|\\\"|g; s/[[:space:]]*$//g;' \
+            -e "/#.*[\"\']/!s| #.*||g; /^#/s|#.*||g;" \
+            -e "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
+            -e "s|^\($s\)\($w\)${s}[:-]$s\(.*\)$s\$|\1$fs\2$fs\3|p" |
+
+        awk -F"$fs" '{
+            indent = length($1)/2;
+            if (length($2) == 0) { conj[indent]="+";} else {conj[indent]="";}
+            vname[indent] = $2;
+            for (i in vname) {if (i > indent) {delete vname[i]}}
+                if (length($3) > 0) {
+                    vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
+                    printf("%s%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, $2, conj[indent-1],$3);
+                }
+            }' |
+
+        sed -e 's/_=/+=/g' |
+
+        awk 'BEGIN {
+                FS="=";
+                OFS="="
+            }
+            /(-|\.).*=/ {
+                gsub("-|\\.", "_", $1)
+            }
+            { print }'
+    ) < "$yaml_file"
+}
+
+create_variables() {
+    local yaml_file="$1"
+    local prefix="$2"
+    eval "$(parse_yaml "$yaml_file" "$prefix")"
+}
+
+if [ ! -e .travis.yml ]; then
+    echo "No .travis.yml found, exiting"
+    exit 1
+fi
+
+function aptinstall() {
+    # apt install
+    # shellcheck disable=SC2154
+    if [[ "$(declare -p travis_addons_apt_packages)" =~ "declare -a" ]]; then
+        echo -e "\nsudo apt -y update\n"
+        sudo apt -y update
+        # shellcheck disable=SC2086
+        echo -e "\nsudo apt-get -yq --no-install-suggests --no-install-recommends install ${travis_addons_apt_packages[*]}\n"
+        sudo apt-get -yq --no-install-suggests --no-install-recommends install \
+            ${travis_addons_apt_packages[*]}
+    fi
+}
+
+function virtualenv_init() {
+    # init virtualenv directory
+    if [ -n "$1" ]; then
+        echo -e "\nvirtualenv -p \"$1\" ~/.venv\n"
+        virtualenv -p "$1" ~/.venv
+    else
+        echo -e "\nvirtualenv ~/.venv\n"
+        virtualenv ~/.venv
+    fi
+}
+
+function virtualenv_activate() {
+    # activate virtualenv
+    # shellcheck disable=SC1090
+    echo -e "\n. ~/.venv/bin/activate\n"
+    . ~/.venv/bin/activate
+}
+
+function python_run() {
+    # shellcheck disable=SC2154
+    if [[ "$(declare -p travis_install)" =~ "declare -a" ]]; then
+        echo "Running \"install\""
+        for ((i = 0; i < ${#travis_install[@]}; i++))
+        do
+            echo -e "\n${travis_install[$i]}\n"
+            if ! ${travis_install[$i]}; then
+                failure=1
+            fi
+        done
+    fi
+    # shellcheck disable=SC2154
+    if [[ "$(declare -p travis_script)" =~ "declare -a" ]]; then
+        echo "Running \"script\""
+        for ((i = 0; i < ${#travis_script[@]}; i++))
+        do
+            echo -e "\n${travis_script[$i]}\n"
+            if ! ${travis_script[$i]}; then
+                failure=1
+            fi
+        done
+    fi
+}
+
+create_variables .travis.yml travis_
+
+aptinstall
+
+# shellcheck disable=SC2154
+if [[ "$(declare -p travis_python)" =~ "declare -a" ]]; then
+    # shellcheck disable=SC2068
+    for pv in ${travis_python[@]}; do
+        # strip quotes
+        temp="${pv%\"}"
+        pv="${temp#\"}"
+        ppath=/usr/bin/python$pv
+        virtualenv_init "$ppath"
+        virtualenv_activate
+        python_run "$ppath"
+        deactivate
+    done
+else
+    virtualenv_init
+    virtualenv_activate
+    python_run 
+    deactivate
+fi
+
+exit $failure