Initial packer project

Summary:
This is a tool (right now more a script, really) for splitting a Flipper distribution into smaller chunks that can be individually cached, hashed and downloaded. It's incomplete but can already bundle up Mac apps into smaller chunks that can be merged back again into one app.

It takes a config file that specifies how to slice the inputs up and comes with a default copy bundled in. That's in line with the general "design" where it tries to make the right assumptions, for instance defaulting to the normal dist output directory.

Reviewed By: jknoxville

Differential Revision: D21302551

fbshipit-source-id: b22670ff4825ce526dd0f20320f87080c058cd93

packer/README.md

@@ -0,0 +1,64 @@
+# Flipper Packer
+
+*Work in progress and incomplete*
+
+A tool for splitting a Flipper build into smaller artifacts that can be distributed and cached separately.
+
+**N.B. Buck build files are not included in the open-source export of this tool.**
+
+## Building
+
+With cargo:
+```
+$ cargo build
+```
+
+With Buck:
+```
+$ buck build :packer
+```
+
+## Testing
+
+With cargo:
+```
+$ cargo test
+```
+
+With Buck:
+```
+$ buck test :packer
+```
+
+## Usage
+
+See help page:
+
+```
+$ cargo run -- --help
+flipper-packer 0.1.0
+Facebook, Inc.
+
+
+USAGE:
+    flipper-packer [FLAGS] [OPTIONS] <PLATFORM>
+
+FLAGS:
+    -h, --help        Prints help information
+    -p, --packlist    Custom list of files to pack.
+    -V, --version     Prints version information
+
+OPTIONS:
+    -d, --dist <DIRECTORY>      Flipper dist directory to read from. [default: ~/fbsource/xplat/sonar/dist]
+    -o, --output <DIRECTORY>    Directory to write output files to. [default: .]
+
+ARGS:
+    <PLATFORM>    Platform to build for [possible values: Mac, Linux, Windows]
+
+```
+
+Buck:
+
+```
+$ buck run :packer
+```