Inject sha information via env

Move git rev-parse to Makefile

.circleci/config.yml

@@ -2,10 +2,10 @@ defaults:
   environment: &env
     TRAVIS_BRANCH: $CIRCLE_BRANCH
     TRAVIS_PULL_REQUEST: $CI_PULL_REQUEST || "false"
-    CURRENT_TAG: $CIRCLE_TAG
   steps: &ci_steps
     - checkout
     - run: bin/ci prepare_system
+    - run: export CURRENT_TAG=$CIRCLE_TAG
     - run: bin/ci prepare_build
     - run: bin/ci build
 

.travis.yml

@@ -9,9 +9,9 @@ services:
 matrix:
   fast_finish: true
   include:
-    - env: ARCH=i386 ARCH_CMD=linux32 CURRENT_TAG=$TRAVIS_TAG
+    - env: ARCH=i386 ARCH_CMD=linux32
       os: linux
-    - env: ARCH=x86_64 ARCH_CMD=linux64 CURRENT_TAG=$TRAVIS_TAG
+    - env: ARCH=x86_64 ARCH_CMD=linux64
       os: linux
 
 git:
@@ -23,6 +23,7 @@ before_install:
   - bin/ci prepare_system
 
 install:
+  - export CURRENT_TAG=$TRAVIS_TAG
   - bin/ci prepare_build
 
 script:

Makefile

@@ -29,7 +29,8 @@ SOURCES := $(shell find src -name '*.cr')
 SPEC_SOURCES := $(shell find spec -name '*.cr')
 override FLAGS += $(if $(release),--release )$(if $(stats),--stats )$(if $(progress),--progress )$(if $(threads),--threads $(threads) )$(if $(debug),-d )$(if $(static),--static )$(if $(LDFLAGS),--link-flags="$(LDFLAGS)" )
 SPEC_FLAGS := $(if $(verbose),-v )$(if $(junit_output),--junit_output $(junit_output) )
-EXPORTS := $(if $(release),,CRYSTAL_CONFIG_PATH="$(PWD)/src")
+CRYSTAL_CONFIG_SHA := $(shell git rev-parse --short HEAD 2> /dev/null)
+EXPORTS := $(if $(release),,CRYSTAL_CONFIG_PATH="$(PWD)/src") CRYSTAL_CONFIG_SHA="$(CRYSTAL_CONFIG_SHA)"
 SHELL = sh
 LLVM_CONFIG_FINDER := \
   [ -n "$(LLVM_CONFIG)" ] && command -v "$(LLVM_CONFIG)" || \

src/compiler/crystal/config.cr

@@ -27,7 +27,7 @@ module Crystal
     end
 
     def self.sha
-      sha = {{ `(git rev-parse --short HEAD 2> /dev/null) || true`.stringify.chomp }}
+      sha = {{ env("CRYSTAL_CONFIG_SHA") || "" }}
       sha = nil if sha.empty?
 
       sha