aboutsummaryrefslogtreecommitdiff
path: root/test/lint/lint-whitespace.sh
blob: c5d43043d5d24b11ef7c6e5a55d7ee2afeabe93c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
#!/bin/bash
#
# Copyright (c) 2017 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Check for new lines in diff that introduce trailing whitespace.

# We can't run this check unless we know the commit range for the PR.

while getopts "?" opt; do
  case $opt in
    ?)
      echo "Usage: .lint-whitespace.sh [N]"
      echo "       TRAVIS_COMMIT_RANGE='<commit range>' .lint-whitespace.sh"
      echo "       .lint-whitespace.sh -?"
      echo "Checks unstaged changes, the previous N commits, or a commit range."
      echo "TRAVIS_COMMIT_RANGE='47ba2c3...ee50c9e' .lint-whitespace.sh"
      exit 0
    ;;
  esac
done

if [ -z "${TRAVIS_COMMIT_RANGE}" ]; then
  if [ "$1" ]; then
    TRAVIS_COMMIT_RANGE="HEAD~$1...HEAD"
  else
    TRAVIS_COMMIT_RANGE="HEAD"
  fi
fi

showdiff() {
  if ! git diff -U0 "${TRAVIS_COMMIT_RANGE}" -- "." ":(exclude)depends/patches/" ":(exclude)src/leveldb/" ":(exclude)src/secp256k1/" ":(exclude)src/univalue/" ":(exclude)doc/release-notes/"; then
    echo "Failed to get a diff"
    exit 1
  fi
}

showcodediff() {
  if ! git diff -U0 "${TRAVIS_COMMIT_RANGE}" -- *.cpp *.h *.md *.py *.sh ":(exclude)src/leveldb/" ":(exclude)src/secp256k1/" ":(exclude)src/univalue/" ":(exclude)doc/release-notes/"; then
    echo "Failed to get a diff"
    exit 1
  fi
}

RET=0

# Check if trailing whitespace was found in the diff.
if showdiff | grep -E -q '^\+.*\s+$'; then
  echo "This diff appears to have added new lines with trailing whitespace."
  echo "The following changes were suspected:"
  FILENAME=""
  SEEN=0
  SEENLN=0
  while read -r line; do
    if [[ "$line" =~ ^diff ]]; then
      FILENAME="$line"
      SEEN=0
    elif [[ "$line" =~ ^@@ ]]; then
      LINENUMBER="$line"
      SEENLN=0
    else
      if [ "$SEEN" -eq 0 ]; then
        # The first time a file is seen with trailing whitespace, we print the
        # filename (preceded by a newline).
        echo
        echo "$FILENAME"
        SEEN=1
      fi
      if [ "$SEENLN" -eq 0 ]; then
        echo "$LINENUMBER"
        SEENLN=1
      fi
      echo "$line"
    fi
  done < <(showdiff | grep -E '^(diff --git |@@|\+.*\s+$)')
  RET=1
fi

# Check if tab characters were found in the diff.
if showcodediff | perl -nle '$MATCH++ if m{^\+.*\t}; END{exit 1 unless $MATCH>0}' > /dev/null; then
  echo "This diff appears to have added new lines with tab characters instead of spaces."
  echo "The following changes were suspected:"
  FILENAME=""
  SEEN=0
  SEENLN=0
  while read -r line; do
    if [[ "$line" =~ ^diff ]]; then
      FILENAME="$line"
      SEEN=0
    elif [[ "$line" =~ ^@@ ]]; then
      LINENUMBER="$line"
      SEENLN=0
    else
      if [ "$SEEN" -eq 0 ]; then
        # The first time a file is seen with a tab character, we print the
        # filename (preceded by a newline).
        echo
        echo "$FILENAME"
        SEEN=1
      fi
      if [ "$SEENLN" -eq 0 ]; then
        echo "$LINENUMBER"
        SEENLN=1
      fi
      echo "$line"
    fi
  done < <(showcodediff | perl -nle 'print if m{^(diff --git |@@|\+.*\t)}')
  RET=1
fi

exit $RET