Travis CI: folded output/default tracebacks (#1331)

* Moved the `script` and `after_failure` sections of `.travis.yml`
  to extra files in a new `.travis/` folder
* Copy paste `.travis/common.sh` from Alpine's aport. They have neat
  formatting functions in there for folding
* Add a folding block around each script that gets called
* Use native tracebacks in pytest. These are the same as we see when
  pmbootstrap crashes usually, instead of printing out the entire
  function that causes an error. I think this makes the error output
  easier to read.

.travis.yml

@@ -9,15 +9,10 @@ install:
   - sudo apt install shellcheck qemu-system-x86
   - pip install flake8 pytest-cov python-coveralls
 script:
-  - test/static_code_analysis.sh
-  - yes "" | ./pmbootstrap.py init
-  - ./pmbootstrap.py kconfig_check
-  - test/check_checksums.py --build
-  - test/testcases_fast.sh --all
+  - .travis/travis_script.sh
 after_success:
   - coveralls
 after_failure:
-  - cat ~/.local/var/pmbootstrap/log.txt
-  - cat ~/.local/var/pmbootstrap/log_testsuite.txt
+  - .travis/travis_after_failure.sh
 notifications:
   - email: false

.travis/common.sh

@@ -0,0 +1,45 @@
+# Source: .travis/common.sh from Alpine's aports repo
+
+die() {
+	print -s1 -c1 "$@\n" 1>&2
+	exit 1
+}
+
+# Marks start of named folding section for Travis and prints title.
+fold_start() {
+	local name="$1"
+	local title="$2"
+
+	printf "\ntravis_fold:start:$name "
+	print -s1 -c6 "> $title\n"
+}
+
+# Marks end of the named folding section.
+fold_end() {
+	local name="$1"
+
+	printf "travis_fold:end:$name\n"
+}
+
+# Prints formatted and colored text.
+print() {
+	local style=0
+	local fcolor=9
+
+	local opt; while getopts 's:c:' opt; do
+		case "$opt" in
+			s) style="$OPTARG";;
+			c) fcolor="$OPTARG";;
+		esac
+	done
+
+	shift $(( OPTIND - 1 ))
+	local text="$@"
+
+	printf "\033[${style};3${fcolor}m$text\033[0m"
+}
+
+title() {
+	printf '\n'
+	print -s1 -c6 "==> $@\n"
+}

.travis/travis_after_failure.sh

@@ -0,0 +1,18 @@
+#!/bin/sh -e
+
+# Go to pmbootstrap folder
+DIR="$(cd "$(dirname "$0")" && pwd -P)"
+cd "$DIR/.."
+
+# Functions for pretty Travis output
+. .travis/common.sh
+
+# pmbootstrap log
+fold_start "log.1" "pmbootstrap log"
+cat ~/.local/var/pmbootstrap/log.txt
+fold_end "log.1"
+
+# Testsuite log
+fold_start "log.2" "Testsuite log"
+cat ~/.local/var/pmbootstrap/log_testsuite.txt
+fold_end "log.2"

.travis/travis_script.sh

@@ -0,0 +1,33 @@
+#!/bin/sh -e
+
+# Go to pmbootstrap folder
+DIR="$(cd "$(dirname "$0")" && pwd -P)"
+cd "$DIR/.."
+
+# Functions for pretty Travis output
+. .travis/common.sh
+
+# Static code analysis
+fold_start "static_analysis" "Static code analysis"
+test/static_code_analysis.sh
+fold_end "static_analysis"
+
+# pmbootstrap init
+fold_start "init" "pmbootstrap init"
+yes "" | ./pmbootstrap.py init
+fold_end "init"
+
+# pmbootstrap kconfig_check
+fold_start "kconfig_check" "pmbootstrap kconfig_check"
+./pmbootstrap.py kconfig_check
+fold_end "kconfig_check"
+
+# pmbootstrap build --strict
+fold_start "build" "pmbootstrap build --strict"
+test/check_checksums.py --build
+fold_end "build"
+
+# Testsuite
+fold_start "testsuite" "Testsuite and code coverage"
+test/testcases_fast.sh --all
+fold_end "testsuite"

test/testcases_fast.sh

@@ -35,4 +35,4 @@ done
 
 # Run enabled testcases with coverage enabled
 # shellcheck disable=SC2086
-pytest --cov=pmb $enabled
+pytest --cov=pmb $enabled --tb=native