iankelling.org Git - distro-setup/blob - .git_template/hooks/pre-commit

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16
  17 # ian: This section is the git upstream example hook, but it's actually useful.
  18
  19 # An example hook script to verify what is about to be committed.
  20 # Called by "git commit" with no arguments.  The hook should
  21 # exit with non-zero status after issuing an appropriate message if
  22 # it wants to stop the commit.
  23 #
  24 # To enable this hook, rename this file to "pre-commit".
  25
  26 if git rev-parse --verify HEAD >/dev/null 2>&1
  27 then
  28     against=HEAD
  29 else
  30     # Initial commit: diff against an empty tree object
  31     against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
  32 fi
  33
  34 # If you want to allow non-ASCII filenames set this variable to true.
  35 allownonascii=$(git config --bool hooks.allownonascii)
  36
  37 # Redirect output to stderr.
  38 exec 1>&2
  39
  40 # Cross platform projects tend to avoid non-ASCII filenames; prevent
  41 # them from being added to the repository. We exploit the fact that the
  42 # printable range starts at the space character and ends with tilde.
  43 if [[ $allownonascii != true ]] &&
  44        # Note that the use of brackets around a tr range is ok here, (it's
  45        # even required, for portability to Solaris 10's /usr/bin/tr), since
  46        # the square bracket bytes happen to fall in the designated range.
  47        test $(git diff --cached --name-only --diff-filter=A -z $against |
  48                   LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
  49 then
  50     cat <<EOF
  51 Error: Attempt to add a non-ASCII file name.
  52 This can cause problems if you want to work with people on other platforms.
  53 To be portable it is advisable to rename the file.
  54 If you know what you are doing you can disable this check using:
  55   git config hooks.allownonascii true
  56 EOF
  57     exit 1
  58 fi
  59
  60
  61
  62 # ian: inspired from:
  63 # https://github.com/ntc2/conf/blob/master/dot.gitconfig
  64 # last checked for any changes there on 7/2016
  65 # duplicated at,
  66 # http://stackoverflow.com/a/15398512/14456
  67
  68
  69 set -eE -o pipefail
  70 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
  71
  72 if [[ $(git config --bool hooks.allowwhitespace) == true ]] || \
  73        [[ $GIT_ALLOWWHITESPACE == true ]]; then
  74     exit 0
  75 fi
  76
  77 # bail out when we call ourselves or there are no whitespace issues.
  78 if [[ $GIT_ALLOWWHITESPACE == ignore ]] ||
  79        ws_issues=$(git diff-index --check --cached $against --); then
  80     echo "$ws_issues"
  81     exit 0
  82 fi
  83 if [[ -d "$(git rev-parse --git-dir)/rebase-merge" ]] ; then
  84     cat <<'EOF'
  85 warning: whitespace issues, but rebase in progress, so I can't/won't fix them.
  86 If you want to fix them, do for example:
  87 git rebase --whitespace=fix HEAD~2
  88 EOF
  89     echo "$ws_issues"
  90     exit 0
  91 fi
  92 # can't do it on the first commit
  93 if ! git rev-list HEAD --count &>/dev/null; then
  94     cat <<'EOF'
  95 Whitespace issues found. We can't fix in a pre-commit hook for the first commit.
  96 Either fix on your own. I suggest https://github.com/dlenski/wtf, from git root:
  97
  98 git ls-files --exclude-standard -cmo --no-empty-directory | while read -r f; do if [[ -L $f ]] || ! grep -Iq . "$f"; then continue; fi;  wtf.py -i -E lf "$f"; done
  99
 100 or allow whitespace with:
 101 git config hooks.allowwhitespace true, or export GIT_ALLOWWHITESPACE=true
 102 EOF
 103     echo "$ws_issues"
 104     exit 1
 105 fi
 106 echo "Fixing whitespace lines. To avoid this, do:
 107 git config hooks.allowwhitespace true, or export GIT_ALLOWWHITESPACE=true"
 108 export GIT_ALLOWWHITESPACE=ignore
 109 if ! git diff-files --quiet . && \
 110         ! git diff-index --quiet --cached HEAD; then
 111     # - dirty tree and dirty index
 112     git commit -m "temporary commit of index while fixing whitespace"
 113     git add -u :/
 114     git commit -m "temporary commit of non-index while fixing whitespace"
 115     git rebase --whitespace=fix HEAD~2
 116     git reset HEAD~ &&
 117         git reset --soft HEAD~
 118 elif ! git diff-files --quiet .; then
 119     # - dirty tree and clean index
 120     git add -u :/
 121     git commit -m "temporary commit of non-index while fixing whitespace"
 122     git rebase --whitespace=fix HEAD~
 123     git reset HEAD~
 124 elif ! git diff-index --quiet --cached HEAD; then
 125     # - clean tree and dirty index
 126     git commit -m "temporary commit of index while fixing whitespace"
 127     git rebase --whitespace=fix HEAD~
 128     git reset --soft HEAD~
 129 fi