xref: /openbmc/qemu/scripts/git-submodule.sh (revision d447a624) 
1#!/bin/sh
2#
3# This code is licensed under the GPL version 2 or later.  See
4# the COPYING file in the top-level directory.
5
6substat=".git-submodule-status"
7
8command=$1
9shift
10maybe_modules="$@"
11
12test -z "$maybe_modules" && exit 0
13test -z "$GIT" && GIT=$(command -v git)
14
15cd "$(dirname "$0")/.."
16
17no_git_error=
18if ! test -e ".git"; then
19    no_git_error='no git checkout exists'
20elif test -z "$GIT"; then
21    no_git_error='git binary not found'
22fi
23
24is_git() {
25    test -z "$no_git_error"
26}
27
28update_error() {
29    echo "$0: $*"
30    echo
31    echo "Unable to automatically checkout GIT submodules '$modules'."
32    echo "If you require use of an alternative GIT binary (for example to"
33    echo "enable use of a transparent proxy), please disable automatic"
34    echo "GIT submodule checkout with:"
35    echo
36    echo " $ ./configure --disable-download"
37    echo
38    echo "and then manually update submodules prior to running make, with:"
39    echo
40    echo " $ GIT='tsocks git' scripts/git-submodule.sh update $modules"
41    echo
42    exit 1
43}
44
45validate_error() {
46    if is_git && test "$1" = "validate"; then
47        echo "GIT submodules checkout is out of date, and submodules"
48        echo "configured for validate only. Please run"
49        echo "  scripts/git-submodule.sh update $maybe_modules"
50        echo "from the source directory or call configure with"
51        echo "  --enable-download"
52    fi
53    exit 1
54}
55
56check_updated() {
57    local CURSTATUS OLDSTATUS
58    CURSTATUS=$($GIT submodule status $module)
59    OLDSTATUS=$(grep $module $substat)
60    test "$CURSTATUS" = "$OLDSTATUS"
61}
62
63if is_git; then
64    test -e $substat || touch $substat
65    modules=""
66    for m in $maybe_modules
67    do
68        $GIT submodule status $m 1> /dev/null 2>&1
69        if test $? = 0
70        then
71            modules="$modules $m"
72            grep $m $substat > /dev/null 2>&1 || $GIT submodule status $module >> $substat
73        else
74            echo "warn: ignoring non-existent submodule $m"
75        fi
76    done
77else
78    modules=$maybe_modules
79fi
80
81case "$command" in
82status|validate)
83    for module in $modules; do
84        if is_git; then
85            check_updated $module || validate_error "$command"
86        elif ! (set xyz "$module"/* && test -e "$2"); then
87            # The directory does not exist or it contains no files
88            echo "$0: sources not available for $module and $no_git_error"
89            validate_error "$command"
90        fi
91    done
92    ;;
93
94update)
95    is_git || {
96        echo "$0: unexpectedly called with submodules but $no_git_error"
97        exit 1
98    }
99
100    $GIT submodule update --init $modules 1>/dev/null
101    test $? -ne 0 && update_error "failed to update modules"
102    for module in $modules; do
103        check_updated $module || echo Updated "$module"
104    done
105
106    (while read -r REPLY; do
107        for module in $modules; do
108            case $REPLY in
109                *" $module "*) continue 2 ;;
110            esac
111        done
112        printf '%s\n' "$REPLY"
113    done
114    $GIT submodule status $modules
115    test $? -ne 0 && update_error "failed to save git submodule status" >&2) < $substat > $substat.new
116    mv -f $substat.new $substat
117    ;;
118esac
119
120exit 0
121