Cross-compiling get_tools Makefile added

Makefile

@@ -107,7 +107,7 @@ check_tools:
 
 update_tools:
 	@echo "--> Updating tools to correct version"
-	./scripts/get_tools.sh
+	$(MAKE) -C scripts get_tools
 
 update_dev_tools:
 	@echo "--> Downloading linters (this may take awhile)"
@@ -116,7 +116,7 @@ update_dev_tools:
 
 get_tools:
 	@echo "--> Installing tools"
-	./scripts/get_tools.sh
+	$(MAKE) -C scripts get_tools
 
 get_dev_tools:
 	@echo "--> Downloading linters (this may take awhile)"

PENDING.md

@@ -41,7 +41,7 @@ IMPROVEMENTS
 
 * Gaia
  - #2637 [x/gov] Switched inactive and active proposal queues to an iterator based queue
- - #2672 [Makefile] Updated for better Windows compatibility and ledger support logic
+ - #2672 [Makefile] Updated for better Windows compatibility and ledger support logic, get_tools was rewritten as a cross-compatible Makefile.
 
 * SDK
  - \#2573 [x/distribution] add accum invariance

scripts/Makefile

@@ -0,0 +1,54 @@
+###
+# Find OS and Go environment
+# GO contains the Go binary
+# FS contains the OS file separator
+###
+ifeq ($(OS),Windows_NT)
+  GO := $(shell where go.exe 2> NUL)
+  FS := \\
+else
+  GO := $(shell command -v go 2> /dev/null)
+  FS := /
+endif
+
+ifeq ($(GO),)
+  $(error could not find go. Is it in PATH? $(GO))
+endif
+
+GOPATH ?= $(shell $(GO) env GOPATH)
+GITHUBDIR := $(GOPATH)$(FS)src$(FS)github.com
+
+###
+# Functions
+###
+
+go_get = $(if $(findstring Windows_NT,$(OS)),\
+IF NOT EXIST $(GITHUBDIR)$(FS)$(1)$(FS) ( mkdir $(GITHUBDIR)$(FS)$(1) ) else (cd .) &\
+IF NOT EXIST $(GITHUBDIR)$(FS)$(1)$(FS)$(2)$(FS) ( cd $(GITHUBDIR)$(FS)$(1) && git clone https://github.com/$(1)/$(2) ) else (cd .) &\
+,\
+mkdir -p $(GITHUBDIR)$(FS)$(1) &&\
+(test ! -d $(GITHUBDIR)$(FS)$(1)$(FS)$(2) && cd $(GITHUBDIR)$(FS)$(1) && git clone https://github.com/$(1)/$(2)) || true &&\
+)\
+cd $(GITHUBDIR)$(FS)$(1)$(FS)$(2) && git fetch origin && git checkout -q $(3)
+
+go_install = $(call go_get,$(1),$(2),$(3)) && cd $(GITHUBDIR)$(FS)$(1)$(FS)$(2) && $(GO) install
+
+###
+# get_tools
+###
+all: get_tools
+get_tools: dep gometalinter statik
+
+dep:
+	$(call go_get,golang,dep,22125cfaa6ddc71e145b1535d4b7ee9744fefff2)
+	cd $(GITHUBDIR)$(FS)golang$(FS)dep$(FS)cmd$(FS)dep && $(GO) install
+
+#v2.0.11
+gometalinter:
+	$(call go_install,alecthomas,gometalinter,17a7ffa42374937bfecabfb8d2efbd4db0c26741)
+
+statik:
+	$(call go_install,rakyll,statik,v0.1.5)
+
+.PHONY: all get_tools dep gometalinter statik
+