Run benchmark on Travis-CI (#816)

* run benchmark on Travis

* send bm report from Travis

* Update .travis.yml

Author: KDr2

.travis.yml

@@ -8,6 +8,7 @@ jobs:
     - env: STAGE=numerical
     - env: STAGE=stan
     - env: STAGE=dynamichmc
+    - env: STAGE=benchmark
   include:
     - stage: test
       os: linux
@@ -108,6 +109,12 @@ jobs:
         - julia -e 'using Pkg, Turing;
                     cd(joinpath(dirname(pathof(Turing)), ".."));
                     include(joinpath("docs", "make.jl"))'
+    - stage: benchmark
+      julia: 1.1
+      os: linux
+      env: STAGE=benchmark
+      script:
+        - julia ./benchmarks/runbenchmarks.jl
 after_success:
   - julia -e 'if get(ENV, "STAGE", "") == "test"
                 using Pkg; cd(Pkg.dir("Turing")); Pkg.add("Coverage");

benchmarks/runbenchmarks.jl

@@ -0,0 +1,45 @@
+using Dates
+
+BASE_BRANCH = "master"
+CURRENT_BRANCH = strip(read(`git rev-parse --abbrev-ref HEAD`, String))
+
+if get(ENV, "TRAVIS", "false") == "true"
+    if get(ENV, "TRAVIS_PULL_REQUEST", "false") == "true"
+        CURRENT_BRANCH = get(ENV, "TRAVIS_PULL_REQUEST_BRANCH")
+        exit(0)
+    else
+        CURRENT_BRANCH = get(ENV, "TRAVIS_BRANCH", "master")
+    end
+end
+
+SANTI_BR_NAME = 0
+COMMIT_SHA = strip(read(`git rev-parse  HEAD`, String))
+COMMIT_SHA_7 = COMMIT_SHA[1:7]
+TIME = Dates.format(now(), "YYYYmmddHHMM")
+BM_JOB_NAME="BMCI-$(SANTI_BR_NAME)-$(COMMIT_SHA_7)-$(TIME)"
+
+run(`git config remote.origin.fetch '+refs/heads/*:refs/remotes/origin/*'`)
+run(`git fetch --all --unshallow`)
+
+run(`git clone https://github.com/TuringLang/TuringBenchmarks.git ../TuringBenchmarks`)
+
+delete!(ENV, "JULIA_PROJECT")
+
+code_pre = """using Pkg
+# Pkg.instantiate()
+try pkg"develop ." catch end
+try pkg"develop ." catch end
+try pkg"build Turing" catch end
+using Turing
+try pkg"develop ../TuringBenchmarks" catch end
+try pkg"develop ../TuringBenchmarks" catch end
+pkg"add SpecialFunctions"
+using TuringBenchmarks
+"""
+
+code_run = """using TuringBenchmarks.Runner
+Runner.run_bm_on_travis("$BM_JOB_NAME", ("master", "$CURRENT_BRANCH"), "$COMMIT_SHA")
+"""
+
+run(`julia -e $code_pre`)
+run(`julia -e $code_run`)