Squashed 'features/filesystem/littlefs/littlefs/' changes from 5ee20e8..b2124a5

b2124a5 Fixed multiple deploy steps in Travis
949015a Merge pull request #28 from geky/configurables
67daf9e Added cross-compile targets for testing
a3fd2d4 Added more configurable utils
a0a55fb Added conversion to/from little-endian on disk
4f08424 Added software implementations of bitwise instructions
59ce49f Merge pull request #26 from Sim4n6/master
2f8ae34 Added a git ignore file with .o .d blocks dir and lfs bin
e611cf5 Fix incorrect lookahead population before ack
a25743a Fixed some minor error code differences
6716b55 Fixed error check when truncating files to larger size
809ffde Merge pull request #24 from aldot/silence-shadow-warnings-1
dc513b1 Silenced more of aldot's warnings
aa50e03 Commentary typo fix
6d55755 tests: Silence warnings in template
029361e Silence shadow warnings
fd04ed4 Added autogenerated release notes from commits
3101bc9 Do not print command invocation if QUIET
d82e34c Merge pull request #21 from aldot/doc-tweaks
436707c doc: Editorial tweaks
3457252 doc: Spelling fixes
6d8e0e2 Moved -Werror flag to CI only
88f678f Fixed self-assign warning in tests
3ef4847 Added remove step in tests to force rebuild
f694b14 Merge pull request #16 from geky/versioning
5a38d00 Added deploy step in Travis to push new version as tags
035552a Add version info for software library and on-disk structures
997c2e5 Fixed incorrect reliance on errno in emubd
d88f0ac Added lfs_file_truncate
2ad435e Added files test to littlefs-fuse tests in Travis
1fb6a19 Reduced ctz traverse runtime by 2x
db88727 Added error code LFS_ERR_NOTEMPTY
c2fab8f Added asserts on geometry and updated config documentation
472ccc4 Fixed file truncation without writes
aea3d3d Fixed positive seek bounds checking
be22d34 Updated links to Mbed OS
425aa3c Fixed issue with immediate exhaustion and small unaligned storage

git-subtree-dir: features/filesystem/littlefs/littlefs
git-subtree-split: b2124a5

Author: geky

.gitignore

@@ -0,0 +1,9 @@
+# Compilation output
+*.o
+*.d
+*.a
+
+# Testing things
+blocks/
+lfs
+test.c

.travis.yml

@@ -1,48 +1,223 @@
+# Environment variables
+env:
+  global:
+    - CFLAGS=-Werror
+
+# Common test script
 script:
-    # make sure example can at least compile
-    - sed -n '/``` c/,/```/{/```/d; p;}' README.md > test.c &&
-      CFLAGS='
+  # make sure example can at least compile
+  - sed -n '/``` c/,/```/{/```/d; p;}' README.md > test.c &&
+    make all CFLAGS+="
         -Duser_provided_block_device_read=NULL
         -Duser_provided_block_device_prog=NULL
         -Duser_provided_block_device_erase=NULL
         -Duser_provided_block_device_sync=NULL
-        -include stdio.h -Werror' make all size
+        -include stdio.h"
+
+  # run tests
+  - make test QUIET=1
+
+  # run tests with a few different configurations
+  - make test QUIET=1 CFLAGS+="-DLFS_READ_SIZE=1      -DLFS_PROG_SIZE=1"
+  - make test QUIET=1 CFLAGS+="-DLFS_READ_SIZE=512    -DLFS_PROG_SIZE=512"
+  - make test QUIET=1 CFLAGS+="-DLFS_BLOCK_COUNT=1023 -DLFS_LOOKAHEAD=2048"
+
+  - make clean test QUIET=1 CFLAGS+="-DLFS_NO_INTRINSICS"
+
+  # compile and find the code size with the smallest configuration
+  - make clean size
+        OBJ="$(ls lfs*.o | tr '\n' ' ')"
+        CFLAGS+="-DLFS_NO{ASSERT,DEBUG,WARN,ERROR}"
+        | tee sizes
+
+  # update status if we succeeded, compare with master if possible
+  - |
+    if [ "$TRAVIS_TEST_RESULT" -eq 0 ]
+    then
+        CURR=$(tail -n1 sizes | awk '{print $1}')
+        PREV=$(curl 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)
 
-    # run tests
-    - make test QUIET=1
+        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
 
-    # run tests with a few different configurations
-    - CFLAGS="-DLFS_READ_SIZE=1   -DLFS_PROG_SIZE=1"   make test QUIET=1
-    - CFLAGS="-DLFS_READ_SIZE=512 -DLFS_PROG_SIZE=512" make test QUIET=1
-    - CFLAGS="-DLFS_BLOCK_COUNT=1023" make test QUIET=1
-    - CFLAGS="-DLFS_LOOKAHEAD=2048"   make test QUIET=1
+# CI matrix
+jobs:
+  include:
+    # native testing
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=littlefs-x86
+
+    # cross-compile with ARM (thumb mode)
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=littlefs-arm
+        - CC="arm-linux-gnueabi-gcc --static -mthumb"
+        - EXEC="qemu-arm"
+      install:
+        - sudo apt-get install gcc-arm-linux-gnueabi qemu-user
+        - arm-linux-gnueabi-gcc --version
+        - qemu-arm -version
+
+    # cross-compile with PowerPC
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=littlefs-powerpc
+        - CC="powerpc-linux-gnu-gcc --static"
+        - EXEC="qemu-ppc"
+      install:
+        - sudo apt-get install gcc-powerpc-linux-gnu qemu-user
+        - powerpc-linux-gnu-gcc --version
+        - qemu-ppc -version
+
+    # cross-compile with MIPS
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=littlefs-mips
+        - CC="mips-linux-gnu-gcc --static"
+        - EXEC="qemu-mips"
+      install:
+        - sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu/ xenial main universe"
+        - sudo apt-get -qq update
+        - sudo apt-get install gcc-mips-linux-gnu qemu-user
+        - mips-linux-gnu-gcc --version
+        - qemu-mips -version
 
     # self-host with littlefs-fuse for fuzz test
-    - make -C littlefs-fuse
+    - stage: test
+      env:
+        - STAGE=test
+        - NAME=littlefs-fuse
+      install:
+        - sudo apt-get install libfuse-dev
+        - git clone --depth 1 https://github.com/geky/littlefs-fuse
+        - fusermount -V
+        - gcc --version
+      before_script:
+        # setup disk for littlefs-fuse
+        - rm -rf littlefs-fuse/littlefs/*
+        - cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs
+
+        - mkdir mount
+        - sudo chmod a+rw /dev/loop0
+        - dd if=/dev/zero bs=512 count=2048 of=disk
+        - losetup /dev/loop0 disk
+      script:
+        # self-host test
+        - make -C littlefs-fuse
+
+        - littlefs-fuse/lfs --format /dev/loop0
+        - littlefs-fuse/lfs /dev/loop0 mount
 
-    - littlefs-fuse/lfs --format /dev/loop0
-    - littlefs-fuse/lfs /dev/loop0 mount
+        - ls mount
+        - mkdir mount/littlefs
+        - cp -r $(git ls-tree --name-only HEAD) mount/littlefs
+        - cd mount/littlefs
+        - ls
+        - make -B test_dirs test_files QUIET=1
 
-    - ls mount
-    - mkdir mount/littlefs
-    - cp -r $(git ls-tree --name-only HEAD) mount/littlefs
-    - cd mount/littlefs
-    - ls
-    - make -B test_dirs QUIET=1
+      # Automatically update releases
+    - stage: deploy
+      env:
+        - STAGE=deploy
+        - NAME=deploy
+      script:
+        # Update tag for version defined in lfs.h
+        - LFS_VERSION=$(grep -ox '#define LFS_VERSION .*' lfs.h | cut -d ' ' -f3)
+        - LFS_VERSION_MAJOR=$((0xffff & ($LFS_VERSION >> 16)))
+        - LFS_VERSION_MINOR=$((0xffff & ($LFS_VERSION >>  0)))
+        - LFS_VERSION="v$LFS_VERSION_MAJOR.$LFS_VERSION_MINOR"
+        - echo "littlefs version $LFS_VERSION"
+        - |
+          curl -u $GEKY_BOT_RELEASES -X POST \
+            https://api.github.com/repos/$TRAVIS_REPO_SLUG/git/refs \
+            -d "{
+              \"ref\": \"refs/tags/$LFS_VERSION\",
+              \"sha\": \"$TRAVIS_COMMIT\"
+            }"
+        - |
+          curl -f -u $GEKY_BOT_RELEASES -X PATCH \
+            https://api.github.com/repos/$TRAVIS_REPO_SLUG/git/refs/tags/$LFS_VERSION \
+            -d "{
+              \"sha\": \"$TRAVIS_COMMIT\"
+            }"
+        # Create release notes from commits
+        - LFS_PREV_VERSION="v$LFS_VERSION_MAJOR.$(($LFS_VERSION_MINOR-1))"
+        - |
+          if [ $(git tag -l "$LFS_PREV_VERSION") ]
+          then
+            curl -u $GEKY_BOT_RELEASES -X POST \
+                https://api.github.com/repos/$TRAVIS_REPO_SLUG/releases \
+                -d "{
+                    \"tag_name\": \"$LFS_VERSION\",
+                    \"name\": \"$LFS_VERSION\"
+                }"
+            RELEASE=$(
+                curl -f https://api.github.com/repos/$TRAVIS_REPO_SLUG/releases/tags/$LFS_VERSION
+            )
+            CHANGES=$(
+                git log --oneline $LFS_PREV_VERSION.. --grep='^Merge' --invert-grep
+            )
+            curl -f -u $GEKY_BOT_RELEASES -X PATCH \
+                https://api.github.com/repos/$TRAVIS_REPO_SLUG/releases/$(
+                    jq -r '.id' <<< "$RELEASE"
+                ) \
+                -d "$(
+                    jq -s '{
+                        "body": ((.[0] // "" | sub("(?<=\n)#+ Changes.*"; ""; "mi"))
+                            + "### Changes\n\n" + .[1])
+                    }' <(jq '.body' <<< "$RELEASE") <(jq -sR '.' <<< "$CHANGES")
+                )"
+          fi
 
+# Manage statuses
 before_install:
-    - fusermount -V
-    - gcc --version
+  - |
+    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\"
+        }"
 
-install:
-    - sudo apt-get install libfuse-dev
-    - git clone --depth 1 https://github.com/geky/littlefs-fuse
+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\"
+        }"
 
-before_script:
-    - rm -rf littlefs-fuse/littlefs/*
-    - cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs
+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\"
+        }"
 
-    - mkdir mount
-    - sudo chmod a+rw /dev/loop0
-    - dd if=/dev/zero bs=512 count=2048 of=disk
-    - losetup /dev/loop0 disk
+# Job control
+stages:
+    - name: test
+    - name: deploy
+      if: branch = master