From: John Mulligan <jmulligan@redhat.com>
Date: Mon, 14 Nov 2022 15:57:25 +0000 (-0500)
Subject: src/script: add helper function has_build_dir
X-Git-Tag: v18.2.5~81^2~3
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=b12f175e63983b1248d0e3d3610b2f93f1f2d6d8;p=ceph.git

src/script: add helper function has_build_dir

This function returns successfully if $BUILD_DIR exists and is valid.
This is a useful building block for automation around the build and
can be used to avoid re-running commands that fail is the build dir
exists already.

Signed-off-by: John Mulligan <jmulligan@redhat.com>
(cherry picked from commit 3046f78d69ea1b6937ce84e53f72934201a105db)
---

diff --git a/src/script/lib-build.sh b/src/script/lib-build.sh
index 6c4455344379d..0e915831a51aa 100644
--- a/src/script/lib-build.sh
+++ b/src/script/lib-build.sh
@@ -49,6 +49,14 @@ function get_processors() {
     fi
 }
 
+# has_build_dir returns true if a build directory exists and can be used
+# for builds. has_build_dir is designed to interoperate with do_cmake.sh
+# and uses the same BUILD_DIR environment variable. It checks for the
+# directory relative to the current working directory.
+function has_build_dir() {
+    ( cd "${BUILD_DIR:=build}" && [[ -f build.ninja || -f Makefile ]] )
+}
+
 # discover_compiler takes one argument, purpose, which may be used
 # to adjust the results for a specific need. It sets three environment
 # variables `discovered_c_compiler`, `discovered_cxx_compiler` and