[Buildroot] [PATCH 04/51] core/pkg-generic: add macro to hardlink-or-copy
Yann E. MORIN
yann.morin.1998 at free.fr
Mon Nov 23 14:47:34 UTC 2015
Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Luca Ceresoli <luca at lucaceresoli.net>
---
Changes RFC -> v1:
- move to pkg-utils (Luca)
---
package/pkg-utils.mk | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
index 44bd2c9..447b849 100644
--- a/package/pkg-utils.mk
+++ b/package/pkg-utils.mk
@@ -113,6 +113,24 @@ $$(error Package error: use $(2) instead of $(1). Please fix your .mk file)
endif
endef
+################################################################################
+# hardlink-copy -- hardlink source and destination if possible, otherwise
+# do a simple copy
+#
+# argument 1 is the source *file*
+# argument 2 is the destination *directory*
+#
+# example:
+# $(call hardlink-copy,/path/to/source/file,/path/to/destination/dir/)
+#
+# Note: we make that a single command, so se can:
+# - use '$(Q)' in front of it and properly silence the whole macro,
+# - use '|| exit 1' after it, so we can exit on error in compound commands,
+################################################################################
+define hardlink-copy
+ { mkdir -p $(2) && { cp -l $(1) $(2) 2>/dev/null || cp $(1) $(2); } }
+endef
+
#
# legal-info helper functions
#
--
1.9.1
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