support/download/git: fix shellcheck errors

The quoting around the expansion of ${relative_dir} was indeed incorrect
since it was introduced back in 8fe9894f655f (suport/download: fix git
wrapper with submodules on older git versions): it is in fact already
quoted as part of the whole sed expression.

${GIT} can contain more than one item, but we don't care about splitting
on spaces when we just print it for debug, so we can just quote it
rather than add an exception.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

.checkpackageignore

@@ -1612,7 +1612,6 @@ support/download/check-hash Shellcheck
 support/download/cvs Shellcheck
 support/download/dl-wrapper Shellcheck
 support/download/file Shellcheck
-support/download/git Shellcheck
 support/download/go-post-process Shellcheck
 support/download/hg Shellcheck
 support/download/scp Shellcheck

support/download/git

@@ -21,6 +21,7 @@ set -e
 # Environment:
 #   GIT      : the git command to call
 
+# shellcheck disable=SC1090 # Only provides mk_tar_gz()
 . "${0%/*}/helpers"
 
 # Save our path and options in case we need to call ourselves again
@@ -83,12 +84,13 @@ set -E
 # being expanded a second time (in case there are spaces in them)
 _git() {
     if [ -z "${quiet}" ]; then
-        printf '%s ' GIT_DIR="${git_cache}/.git" ${GIT} "${@}"; printf '\n'
+        printf '%s ' GIT_DIR="${git_cache}/.git" "${GIT}" "${@}"; printf '\n'
     fi
     _plain_git "$@"
 }
 # Note: please keep command below aligned with what is printed above
 _plain_git() {
+    # shellcheck disable=SC2086 # We want word-splitting for GIT
     eval GIT_DIR="${git_cache}/.git" ${GIT} "${@}"
 }
 
@@ -174,6 +176,7 @@ fi
 # the working copy as well as the repository, which means submodules
 # will not be cached for older versions.
 #
+# shellcheck disable=SC2016 # Will be expanded by git-foreach
 cmd='printf "Deregistering submodule \"%s\"\n" "${path}" && cd .. && rm -rf "${path##*/}"'
 _git submodule --quiet foreach "'${cmd}'"
 
@@ -200,11 +203,12 @@ if [ ${recurse} -eq 1 ]; then
     # that the archives are reproducible across a wider range of git
     # versions. However, we can't do that if git is too old and uses
     # full repositories for submodules.
+    # shellcheck disable=SC2016 # Will be expanded by git-foreach
     cmd='printf "%s\n" "${path}/"'
     for module_dir in $( _plain_git submodule --quiet foreach "'${cmd}'" ); do
         [ -f "${module_dir}/.git" ] || continue
         relative_dir="$( sed -r -e 's,/+,/,g; s,[^/]+/,../,g' <<<"${module_dir}" )"
-        sed -r -i -e "s:^gitdir\: $(pwd)/:gitdir\: "${relative_dir}":" "${module_dir}/.git"
+        sed -r -i -e "s:^gitdir\: $(pwd)/:gitdir\: ${relative_dir}:" "${module_dir}/.git"
     done
 fi
 
@@ -214,6 +218,7 @@ if [ ${large_file} -eq 1 ]; then
     _git lfs fetch
     _git lfs checkout
     # If there are also submodules, recurse into them,
+    # shellcheck disable=SC2086 # We want word-splitting for GIT
     if [ ${recurse} -eq 1 ]; then
         _git submodule foreach --recursive ${GIT} lfs install --local
         _git submodule foreach --recursive ${GIT} lfs fetch