thorp/README.org
Paul Campbell 761c1c9784
Is AWS SDK calculating MD5Hash again for a local file? (#50)
* [aws-lib] Uploader provide request with the already calculated md5 hash

* [aws-lib] remove unused accepts method

* [aws-lib] Uploader refactoring

* [domain] Config remove unused threshold and max retries items

* [core] Show upload errors in summary

* [domain] LocalFile add helper to explicitly compare by hash value

Looking to add an optional field to MD5Hash but we want to do our
checks here only on the hash value, not whether a digest is available
or not.

* [core] Sync refactoring

* [core] SyncSuite invoke subject inside it method and after declaring expectations

* [core] SyncSuite use the localfile hash rather than something arbitrary

* [cli] Add `--no-global` and `--no-user` options

* [core] LocalFileStream refactoring

* [core] SyncSuite: ignore user and global configuration files

* [domain] MD5Hash now can optionally store the base64 encoded hash

* [core] MD5HashGenerator pass the digest to MD5Hash

* [aws-lib] Uploader use the base64 encoded hash

* [changelog] updated
2019-06-21 19:20:35 +01:00

75 lines
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* thorp
Synchronisation of files with S3 using the hash of the file contents.
[[https://www.codacy.com/app/kemitix/thorp][file:https://img.shields.io/codacy/grade/c1719d44f1f045a8b71e1665a6d3ce6c.svg?style=for-the-badge]]
Originally based on Alex Kudlick's [[https://github.com/akud/aws-s3-sync-by-hash][aws-s3-sync-by-hash]].
The normal ~aws s3 sync ...~ command only uses the time stamp of files
to decide what files need to be copied. This utility looks at the md5
hash of the file contents.
* Usage
#+begin_example
thorp
Usage: thorp [options]
-s, --source <value> Source directory to sync to S3
-b, --bucket <value> S3 bucket name
-p, --prefix <value> Prefix within the S3 Bucket
-i, --include <value> Include matching paths
-x, --exclude <value> Exclude matching paths
-d, --debug Enable debug logging
--no-global Ignore global configuration
--no-user Ignore user configuration
#+end_example
If you don't provide a ~source~ the current diretory will be used.
The ~--include~ and ~--exclude~ parameters can be used more than once.
* Configuration
Configuration will be read from these files:
- Global: ~/etc/thorp.conf~
- User: ~ ~/.config/thorp.conf~
- Source: ~${source}/.thorp.conf~
Command line arguments override those in Source, which override those
in User, which override those Global, which override any built-in
config.
Built-in config consists of using the current working directory as the
~source~.
Note, that ~include~ and ~exclude~ are cumulative across all
configuration files.
* Behaviour
When considering a local file, the following table governs what should happen:
|---+------------+------------+------------------+--------------------+---------------------|
| # | local file | remote key | hash of same key | hash of other keys | action |
|---+------------+------------+------------------+--------------------+---------------------|
| 1 | exists | exists | matches | - | do nothing |
| 2 | exists | is missing | - | matches | copy from other key |
| 3 | exists | is missing | - | no matches | upload |
| 4 | exists | exists | no match | matches | copy from other key |
| 5 | exists | exists | no match | no matches | upload |
| 6 | is missing | exists | - | - | delete |
|---+------------+------------+------------------+--------------------+---------------------|
* Executable JAR
To build as an executable jar, perform `sbt assembly`
This will create the file
`cli/target/scala-2.12/thorp-assembly-$VERSION.jar` (where $VERSION
is substituted)
Copy and rename this file as `thorp.jar` into the same directory as
the `bin/throp` shell script.