diff mbox

[v3,4/5] build: don't fail if given a git submodule which does not exist

Message ID 20171103153333.6416-5-berrange@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Daniel P. Berrangé Nov. 3, 2017, 3:33 p.m. UTC
If going back in time in git history, across a commit that introduces a new
submodule, the 'git-submodule.sh' script will fail, causing rebuild to fail.

This is because config-host.mak contains a GIT_SUBMODULES variable that lists
a submodule that only exists in the later commit. config-host.mak won't get
repopulated until config.status is invoked, but make won't get this far due to
the submodule error.

This change makes 'git-submodule.sh' check whether each module is known to git
and drops any which are not present. A warning message will be printed when any
submodule is dropped in this manner.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 scripts/git-submodule.sh | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

Comments

Eric Blake Nov. 3, 2017, 6:36 p.m. UTC | #1
On 11/03/2017 10:33 AM, Daniel P. Berrange wrote:
> If going back in time in git history, across a commit that introduces a new
> submodule, the 'git-submodule.sh' script will fail, causing rebuild to fail.
> 
> This is because config-host.mak contains a GIT_SUBMODULES variable that lists
> a submodule that only exists in the later commit. config-host.mak won't get
> repopulated until config.status is invoked, but make won't get this far due to
> the submodule error.
> 
> This change makes 'git-submodule.sh' check whether each module is known to git
> and drops any which are not present. A warning message will be printed when any
> submodule is dropped in this manner.
> 
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
>  scripts/git-submodule.sh | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 

> +do
> +    $GIT submodule status $m 1> /dev/null 2>&1
> +    if test $? = 0
> +    then
> +        modules="$modules $m"
> +    else
> +        echo "warn: ignoring non-existant submodule $m"

s/existant/existent/

With the typo fix,
Reviewed-by: Eric Blake <eblake@redhat.com>
diff mbox

Patch

diff --git a/scripts/git-submodule.sh b/scripts/git-submodule.sh
index 63ace6fc55..2857fc57c4 100755
--- a/scripts/git-submodule.sh
+++ b/scripts/git-submodule.sh
@@ -7,7 +7,7 @@  substat=".git-submodule-status"
 
 command=$1
 shift
-modules="$@"
+maybe_modules="$@"
 
 test -z "$GIT" && GIT=git
 
@@ -33,12 +33,24 @@  error() {
     exit 1
 }
 
-if test -z "$modules"
+if test -z "$maybe_modules"
 then
     test -e $substat || touch $substat
     exit 0
 fi
 
+modules=""
+for m in $maybe_modules
+do
+    $GIT submodule status $m 1> /dev/null 2>&1
+    if test $? = 0
+    then
+        modules="$modules $m"
+    else
+        echo "warn: ignoring non-existant submodule $m"
+    fi
+done
+
 if ! test -e ".git"
 then
     echo "$0: unexpectedly called with submodules but no git checkout exists"