Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10' r/724

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1adf74a3706efbcb0ea4625da106fb2
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

1 files changed, 62 insertions, 0 deletions

diff --git a/third_party/nix/mk/install.mk b/third_party/nix/mk/install.mk
new file mode 100644
index 0000000000..dad0fd8533
--- /dev/null
+++ b/third_party/nix/mk/install.mk
@@ -0,0 +1,62 @@
+# Add a rule for creating $(1) as a directory.  This template may be
+# called multiple times for the same directory.
+define create-dir
+   _i := $$(call add-trailing-slash, $(DESTDIR)$$(strip $(1)))
+  ifndef $$(_i)_SEEN
+    $$(_i)_SEEN = 1
+    $$(_i):
+	$$(trace-mkdir) install -d "$$@"
+  endif
+endef
+
+
+# Add a rule for installing file $(1) as file $(2) with mode $(3).
+# The directory containing $(2) will be created automatically.
+define install-file-as
+
+  _i := $(DESTDIR)$$(strip $(2))
+
+  install: $$(_i)
+
+  $$(_i): $(1) | $$(dir $$(_i))
+	$$(trace-install) install -m $(3) $(1) "$$@"
+
+  $$(eval $$(call create-dir, $$(dir $(2))))
+
+endef
+
+
+# Add a rule for installing file $(1) in directory $(2) with mode
+# $(3).  The directory will be created automatically.
+define install-file-in
+  $$(eval $$(call install-file-as,$(1),$(2)/$$(notdir $(1)),$(3)))
+endef
+
+
+define install-program-in
+  $$(eval $$(call install-file-in,$(1),$(2),0755))
+endef
+
+
+define install-data-in
+  $$(eval $$(call install-file-in,$(1),$(2),0644))
+endef
+
+
+# Install a symlink from $(2) to $(1).  Note that $(1) need not exist.
+define install-symlink
+
+  _i := $(DESTDIR)$$(strip $(2))
+
+  install: $$(_i)
+
+  $$(_i): | $$(dir $$(_i))
+	$$(trace-install) ln -sfn $(1) "$$@"
+
+  $$(eval $$(call create-dir, $$(dir $(2))))
+
+endef
+
+
+print-top-help += \
+  echo "  install: Install into \$$(prefix) (currently set to '$(prefix)')";