Merge branch 'master' into specify-output

.editorconfig

@@ -0,0 +1,7 @@
+[*.sh]
+indent_style = space
+indent_size = 4
+
+shell_variant      = posix
+binary_next_line   = true
+switch_case_indent = true

.github/workflows/check.yml

@@ -0,0 +1,27 @@
+name: Check
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  check:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: Shell Linter
+      run: docker run -v $GITHUB_WORKSPACE:/mnt -w /mnt koalaman/shellcheck reStream.sh
+
+    - name: Shell Formatter
+      run: docker run -v $GITHUB_WORKSPACE:/mnt -w /mnt mvdan/shfmt -d reStream.sh

README.md

@@ -49,8 +49,8 @@ and compiling `lz4` from source with the toolchain enabled, or you can use the
 statically linked binary I have already built and put in this repo.
 
 Copy the `lz4` program to your reMarkable with
-`scp lz4.arm.static root@10.11.99.1:~/lz4`, make it executable with
+`scp lz4.arm.static root@10.11.99.1:/home/root/lz4`, make it executable with
-`ssh root@10.11.99.1 'chmod +x ~/lz4'` and you're ready to go.
+`ssh root@10.11.99.1 'chmod +x /home/root/lz4'` and you're ready to go.
 
 ## Troubleshooting
 

reStream.sh

@@ -31,6 +31,7 @@ while [ $# -gt 0 ]; do
         *)
             echo "Usage: $0 [-p] [-s <source>] [-o <output>] [-f <format>]"
             exit 1
+            ;;
     esac
 done
 
@@ -40,10 +41,13 @@ height=1872
 bytes_per_pixel=2
 loop_wait="true"
 loglevel="info"
-ssh_cmd="ssh -o ConnectTimeout=1 "$ssh_host""
+
+ssh_cmd() {
+    ssh -o ConnectTimeout=1 "$ssh_host" "$@"
+}
 
 # check if we are able to reach the remarkable
-if ! $ssh_cmd true; then
+if ! ssh_cmd true; then
     echo "$ssh_host unreachable"
     exit 1
 fi
@@ -56,12 +60,11 @@ fallback_to_gzip() {
     sleep 2
 }
 
-
 # check if lz4 is present on remarkable
-if $ssh_cmd "[ -f /opt/bin/lz4 ]"; then
+if ssh_cmd "[ -f /opt/bin/lz4 ]"; then
     compress="/opt/bin/lz4"
-elif $ssh_cmd "[ -f ~/lz4 ]"; then
+elif ssh_cmd "[ -f ~/lz4 ]"; then
-    compress="~/lz4"
+    compress="\$HOME/lz4"
 fi
 
 # gracefully degrade to gzip if is not present on remarkable or host
@@ -82,7 +85,7 @@ output_args=""
 video_filters=""
 
 # calculate how much bytes the window is
-window_bytes="$(($width*$height*$bytes_per_pixel))"
+window_bytes="$((width * height * bytes_per_pixel))"
 
 # rotate 90 degrees if landscape=true
 $landscape && video_filters="$video_filters,transpose=1"
@@ -94,9 +97,9 @@ head_fb0="dd if=/dev/fb0 count=1 bs=$window_bytes 2>/dev/null"
 read_loop="while $head_fb0; do $loop_wait; done | $compress"
 
 if [ "$output_path" = - ]; then
-    output_command=ffplay
+    output_cmd=ffplay
 else
-    output_command=ffmpeg
+    output_cmd=ffmpeg
 
     if [ "$format" != - ]; then
         output_args="$output_args -f '$format' "
@@ -112,9 +115,10 @@ output_args="$output_args -vf '${video_filters#,}'"
 
 set -e # stop if an error occurs
 
-$ssh_cmd "$read_loop" \
+# shellcheck disable=SC2086
+ssh_cmd "$read_loop" \
     | $decompress \
-    | "$output_command" \
+    | "$output_cmd" \
              -vcodec rawvideo \
              -loglevel "$loglevel" \
              -f rawvideo \