Merge pull request sstephenson#242 from AlexSkrypnyk/feature/fix-codi…

…ng-standards

Fixed coding standards in shell scripts and enabled shellcheck exit code in CI.

.travis.yml

@@ -30,7 +30,7 @@ script:
 - |
   if [[ "${TRAVIS_OS_NAME:-}" == 'linux' ]]; then
     # @todo: Remove "|| true" once all coding standards issues are fixed.
-    ./shellcheck.sh || true
+    ./shellcheck.sh
   fi
 
   if [[ "${TRAVIS_OS_NAME:-}" == 'linux' && -n "${BASHVER}" ]]; then

libexec/bats-core/bats

@@ -60,7 +60,7 @@ expand_path() {
   printf -v "$result" '%s/%s' "$dirname" "${path##*/}"
 }
 
-BATS_LIBEXEC="$(dirname "$(expand_link "$BASH_SOURCE")")"
+BATS_LIBEXEC="$(dirname "$(expand_link "${BASH_SOURCE[0]}")")"
 export BATS_CWD="$PWD"
 export BATS_TEST_PATTERN="^[[:blank:]]*@test[[:blank:]]+(.*[^[:blank:]])[[:blank:]]+\{(.*)\$"
 export BATS_TEST_FILTER=

libexec/bats-core/bats-exec-suite

@@ -23,6 +23,7 @@ while [[ "$#" -ne 0 ]]; do
     num_jobs="$1"
     ;;
   -x)
+    # shellcheck disable=SC2034
     extended_syntax_flag='-x'
     flags+=('-x')
     ;;
@@ -34,6 +35,7 @@ while [[ "$#" -ne 0 ]]; do
 done
 
 if ( type -p parallel &>/dev/null ); then
+  # shellcheck disable=SC2034
   have_gnu_parallel=1
 elif [[ "$num_jobs" != 1 ]]; then
   printf 'bats: cannot execute "%s" jobs without GNU parallel\n' "$num_jobs" >&2

libexec/bats-core/bats-exec-test

@@ -1,17 +1,20 @@
 #!/usr/bin/env bash
 set -eET
 
+# Variables used in other scripts.
 BATS_COUNT_ONLY=''
 BATS_TEST_FILTER=''
 BATS_EXTENDED_SYNTAX=''
 
 while [[ "$#" -ne 0 ]]; do
   case "$1" in
   -c)
+    # shellcheck disable=SC2034
     BATS_COUNT_ONLY=1
     ;;
   -f)
     shift
+    # shellcheck disable=SC2034
     BATS_TEST_FILTER="$1"
     ;;
   -x)
@@ -52,15 +55,21 @@ load() {
     exit 1
   fi
 
+  # Dynamically loaded user files provided outside of Bats.
+  # shellcheck disable=SC1090
   source "${filename}"
 }
 
 run() {
   local origFlags="$-"
   set +eET
   local origIFS="$IFS"
+  # 'output', 'status', 'lines' are global variables available to tests.
+  # shellcheck disable=SC2034
   output="$("$@" 2>&1)"
+  # shellcheck disable=SC2034
   status="$?"
+  # shellcheck disable=SC2034,SC2206
   IFS=$'\n' lines=($output)
   IFS="$origIFS"
   set "-$origFlags"
@@ -211,7 +220,7 @@ bats_trim_filename() {
 }
 
 bats_debug_trap() {
-  if [[ "$BASH_SOURCE" != "$1" ]]; then
+  if [[ "${BASH_SOURCE[0]}" != "$1" ]]; then
     # The last entry in the stack trace is not useful when en error occured:
     # It is either duplicated (kinda correct) or has wrong line number (Bash < 4.4)
     # Therefore we capture the stacktrace but use it only after the next debug
@@ -365,6 +374,8 @@ bats_evaluate_preprocessed_source() {
   if [[ -z "$BATS_TEST_SOURCE" ]]; then
     BATS_TEST_SOURCE="${BATS_PARENT_TMPNAME}.src"
   fi
+  # Dynamically loaded user files provided outside of Bats.
+  # shellcheck disable=SC1090
   source "$BATS_TEST_SOURCE"
 }
 

libexec/bats-core/bats-format-tap-stream

@@ -20,15 +20,15 @@ fi
 
 update_screen_width() {
   screen_width="$(tput cols)"
-  count_column_left=$(( $screen_width - $count_column_width ))
+  count_column_left=$(( screen_width - count_column_width ))
 }
 
 trap update_screen_width WINCH
 update_screen_width
 
 begin() {
   go_to_column 0
-  buffer_with_truncation $(( $count_column_left - 1 )) '   %s' "$name"
+  buffer_with_truncation $(( count_column_left - 1 )) '   %s' "$name"
   clear_to_end_of_line
   go_to_column $count_column_left
   buffer "%${#count}s/${count}" "$index"
@@ -92,18 +92,19 @@ buffer_with_truncation() {
   shift
   local string
 
+  # shellcheck disable=SC2059
   printf -v 'string' -- "$@"
 
   if [[ "${#string}" -gt "$width" ]]; then
-    buffer '%s...' "${string:0:$(( $width - 4 ))}"
+    buffer '%s...' "${string:0:$(( width - 4 ))}"
   else
     buffer '%s' "$string"
   fi
 }
 
 go_to_column() {
   local column="$1"
-  buffer '\x1B[%dG' $(( $column + 1 ))
+  buffer '\x1B[%dG' $(( column + 1 ))
 }
 
 clear_to_end_of_line() {
@@ -123,7 +124,7 @@ set_color() {
   if [[ "$2" == 'bold' ]]; then
     weight=1
   fi
-  buffer '\x1B[%d;%dm' "$(( 30 + $color ))" "$weight"
+  buffer '\x1B[%d;%dm' "$(( 30 + color ))" "$weight"
 }
 
 clear_color() {
@@ -134,6 +135,7 @@ _buffer=
 
 buffer() {
   local content
+  # shellcheck disable=SC2059
   printf -v content -- "$@"
   _buffer+="$content"
 }

libexec/bats-core/bats-preprocess

@@ -42,7 +42,7 @@ tests=()
       name="${name%[\'\"]}"
       body="${BASH_REMATCH[2]}"
       bats_encode_test_name "$name" 'encoded_name'
-      printf '%s() { bats_test_begin "%s"; %s\n' "$encoded_name" "$name" "$body" || :
+      printf '%s() { bats_test_begin "%s"; %s\n' "${encoded_name:?}" "$name" "$body" || :
 
       if [[ -z "$BATS_TEST_FILTER" || "$name" =~ $BATS_TEST_FILTER ]]; then
         tests+=("$encoded_name")