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109 lines
3.6 KiB
109 lines
3.6 KiB
#!/bin/sh
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# pre-commit hook for ngcpcfg, to store metadata
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# implementation heavily based on etckeeper's pre-commit.d/30store-metadata
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set -e
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# ensure we're in the appropriate git directory (/etc/ngcp-config/ by default),
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# we don't rely on ${NGCPCTL_MAIN} just in case we're invoked directly,
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# e.g. via `/etc/ngcp-config/.git/hooks/pre-commit` (outside of ngcpcfg)
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cd "$(dirname "${0}")/../../"
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if ! git rev-parse --git-dir >/dev/null 2>&1 ; then
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echo "Warning: $(pwd) is not a git repository, ignoring $0"
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exit 0
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fi
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filter_ignore() {
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if [ -e ".gitignore" ]; then
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listfile="$(mktemp -t ngcpcfg-git.XXXXXXXXXX)"
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(git ls-files -oi --exclude-standard; git ls-files -oi --exclude-standard --directory) | sort | uniq > "$listfile" || true
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sed 's/^\.\///' | grep -xFvf "$listfile"
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rm -f "$listfile"
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unset listfile
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else
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cat -
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fi
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}
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shellquote() {
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# Single quotes text, escaping existing single quotes.
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sed -e "s/'/'\"'\"'/g" -e "s/^/'/" -e "s/$/'/"
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}
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generate_metadata() {
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# This function generates the script commands to fix any file
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# ownerships that aren't owner=root, group=root, as well as to
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# store the permissions of files.
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# The script is produced on stdout. Errors go to stderr.
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#
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# The script can use a 'maybe' function, which only runs a command
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# if the file in its last argument exists.
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# We want files in the directory containing VCS data
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# but we want find to ignore the VCS files themselves.
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#
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# (Note that when using this, the find expression must end with
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# -print or -exec, else the excluded directories will actually be
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# printed!)
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# Keep the sort order the same at all times.
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LC_COLLATE=C
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export LC_COLLATE
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# git does not track directories,
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# so empty directories must be stored specially.
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find . -path ./.git -prune -o -type d -empty -print |
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sort | shellquote | sed -e "s/^/mkdir -p /"
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# Store things that don't have the default user or group.
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# Store all file modes, in case the user has an unusual umask.
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find . -path ./.git -prune -o \( -type f -or -type d \) -print | filter_ignore | sort | perl -ne '
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BEGIN { $q=chr(39) }
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sub uidname {
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my $want=shift;
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if (exists $uidcache{$want}) {
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return $uidcache{$want};
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}
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my $name=scalar getpwuid($want);
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return $uidcache{$want}=defined $name ? $name : $want;
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}
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sub gidname {
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my $want=shift;
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if (exists $gidcache{$want}) {
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return $gidcache{$want};
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}
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my $name=scalar getgrgid($want);
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return $gidcache{$want}=defined $name ? $name : $want;
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}
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chomp;
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my @stat=stat($_);
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my $mode = $stat[2];
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my $uid = $stat[4];
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my $gid = $stat[5];
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s/$q/$q"$q"$q/g; # escape single quotes
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s/^/$q/;
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s/$/$q/;
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if ($uid != $>) {
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printf "maybe chown $q%s$q %s\n", uidname($uid), $_;
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}
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if ($gid != $)) {
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printf "maybe chgrp $q%s$q %s\n", gidname($gid), $_;
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}
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printf "maybe chmod %04o %s\n", $mode & 07777, $_;
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'
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}
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ngcpcfg_perms=$(mktemp -t ngcpcfg-perms.XXXXXXXXXX)
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chown root:root "${ngcpcfg_perms}"
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# Make sure the file is not readable by others, since it can leak
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# information about contents of non-readable directories
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chmod 700 "${ngcpcfg_perms}"
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echo "# Generated by ngcpcfg. Do not edit." > "${ngcpcfg_perms}"
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echo >> "${ngcpcfg_perms}"
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generate_metadata >> "${ngcpcfg_perms}"
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mv "${ngcpcfg_perms}" .ngcpcfg_perms
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git add .ngcpcfg_perms
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