A number of CI improvements

- Adopted a number of QOL improvements from littlefs
- Split testing and profiling into separate jobs
- Added status updates which includes changes for both code size and runtime
- Increased timeouts in tests by 10x. This is an effor to avoid false
  failures which occur often if your machine does not handle timeouts
  quickly enough.

  Note, this does increase the time to run tests by, roughly, 10x

  Realistically this is a hack, the correct solution is to stub out the
  timing code for testing so that we can control the number of ticks
  that pass exactly.

.travis.yml

@@ -1,15 +1,111 @@
-script:
-      # Strict compilation of library
-    - CFLAGS='-pedantic -Werror' make
-
-      # Runtime tests
-    - make test
-
-      # Relative profiling with current master
-    - if ( git clone https://github.com/geky/events tests/master &&
-           make -s -C tests/master prof | tee tests/results.txt ) ;
-      then
-        cat tests/results.txt | make prof ; 
-      else
-        make prof ;
-      fi
+# Environment variables
+env:
+  global:
+    - CFLAGS=-Werror
+
+# CI jobs
+jobs:
+  include:
+    # Test stage
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=test
+      script:
+        # Strict compilation of library only (tests use gcc features)
+        - make CFLAGS+=-pedantic
+        # Run tests
+        - make test
+        # Find code size with smallest configuration
+        - make clean size OBJ=equeue.o | tee sizes
+
+        # Update status with code size, compare with master if possible
+        - |
+          if [ "$TRAVIS_TEST_RESULT" -eq 0 ]
+          then
+              CURR=$(tail -n1 sizes | awk '{print $1}')
+              PREV=$(curl -u "$GEKY_BOT_STATUSES" https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/master \
+                  | jq -re "select(.sha != \"$TRAVIS_COMMIT\")
+                      | .statuses[] | select(.context == \"$STAGE/$NAME\").description
+                      | capture(\"code size is (?<size>[0-9]+)\").size" \
+                  || echo 0)
+
+              STATUS="Passed, code size is ${CURR}B"
+              if [ "$PREV" -ne 0 ]
+              then
+                  STATUS="$STATUS ($(python -c "print '%+.2f' % (100*($CURR-$PREV)/$PREV.0)")%)"
+              fi
+          fi
+
+    # Runtime profiling stage
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=prof
+      script:
+        # Relative profiling against master
+        - if ( git clone https://github.com/geky/equeue master &&
+                make -s -C master prof | tee master/runtime ) ;
+          then
+            cat master/runtime | make prof | tee runtime ;
+          else
+            make prof | tee runtime ;
+          fi
+
+        # Update status with profile results, compare with master if possible
+        - |
+          if [ "$TRAVIS_TEST_RESULT" -eq 0 ]
+          then
+            CURR=$(grep -o '[0-9]\+ cycles' runtime | \
+                awk '{sum += $1} END {print sum}')
+            PREV=$(curl -u "$GEKY_BOT_STATUSES" https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/master \
+                | jq -re "select(.sha != \"$TRAVIS_COMMIT\")
+                    | .statuses[] | select(.context == \"$STAGE/$NAME\").description
+                    | capture(\"runtime is (?<runtime>[0-9]+)\").runtime" \
+                || echo 0)
+
+            STATUS="Passed, runtime is ${CURR} cycles"
+            if [ "$PREV" -ne 0 ]
+            then
+                STATUS="$STATUS ($(python -c "print '%+.2f' % (100*($CURR-$PREV)/$PREV.0)")%)"
+            fi
+          fi
+
+
+# Manage statuses
+before_install:
+  - |
+    curl -u "$GEKY_BOT_STATUSES" -X POST \
+        https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
+        -d "{
+            \"context\": \"$STAGE/$NAME\",
+            \"state\": \"pending\",
+            \"description\": \"${STATUS:-In progress}\",
+            \"target_url\": \"https://travis-ci.org/$TRAVIS_REPO_SLUG/jobs/$TRAVIS_JOB_ID\"
+        }"
+
+after_failure:
+  - |
+    curl -u "$GEKY_BOT_STATUSES" -X POST \
+        https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
+        -d "{
+            \"context\": \"$STAGE/$NAME\",
+            \"state\": \"failure\",
+            \"description\": \"${STATUS:-Failed}\",
+            \"target_url\": \"https://travis-ci.org/$TRAVIS_REPO_SLUG/jobs/$TRAVIS_JOB_ID\"
+        }"
+
+after_success:
+  - |
+    curl -u "$GEKY_BOT_STATUSES" -X POST \
+        https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
+        -d "{
+            \"context\": \"$STAGE/$NAME\",
+            \"state\": \"success\",
+            \"description\": \"${STATUS:-Passed}\",
+            \"target_url\": \"https://travis-ci.org/$TRAVIS_REPO_SLUG/jobs/$TRAVIS_JOB_ID\"
+        }"
+
+# Job control
+stages:
+  - name: test

Makefile

@@ -1,28 +1,28 @@
 TARGET = libequeue.a
 
-CC = gcc
-AR = ar
-SIZE = size
+CC ?= gcc
+AR ?= ar
+SIZE ?= size
 
 SRC += $(wildcard *.c)
 OBJ := $(SRC:.c=.o)
 DEP := $(SRC:.c=.d)
 ASM := $(SRC:.c=.s)
 
 ifdef DEBUG
-CFLAGS += -O0 -g3
+override CFLAGS += -O0 -g3
 else
-CFLAGS += -O2
+override CFLAGS += -Os
 endif
 ifdef WORD
-CFLAGS += -m$(WORD)
+override CFLAGS += -m$(WORD)
 endif
-CFLAGS += -I.
-CFLAGS += -std=c99
-CFLAGS += -Wall
-CFLAGS += -D_XOPEN_SOURCE=600
+override CFLAGS += -I.
+override CFLAGS += -std=c99
+override CFLAGS += -Wall
+override CFLAGS += -D_XOPEN_SOURCE=600
 
-LFLAGS += -pthread
+override LFLAGS += -pthread
 
 
 all: $(TARGET)