Merge pull request #69 from arcticicestudio/feature/gh-64-transparent…

…-git-gpg-encryption-with-smudge-clean-filters

Transparent Git encryption using GPG

snowblocks/git/git-diff-igloocrypt

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Copyright (c) 2016-2017 Arctic Ice Studio <[email protected]>
+# Copyright (c) 2016-2017 Sven Greb <[email protected]>
+
+# Project:    igloo
+# Repository: https://github.com/arcticicestudio/igloo
+# License:    MIT
+
+# GPG decryption command for the "igloocrypt" diff filter
+# The output is redirected to suppress error messages caused by the Git filter flow.
+
+gpg --decrypt --batch --no-tty "$1" > /dev/null 2>&1 || cat $1

snowblocks/git/gitattributes

@@ -0,0 +1,14 @@
+# Copyright (c) 2016-2017 Arctic Ice Studio <[email protected]>
+# Copyright (c) 2016-2017 Sven Greb <[email protected]>
+
+# Project:    igloo
+# Repository: https://github.com/arcticicestudio/igloo
+# License:    MIT
+# References:
+#   https://git-scm.com/docs/gitattributes
+#   https://git-scm.com/book/en/v2/Customizing-Git-Git-Attributes#Keyword-Expansion
+#   https://www.gnupg.org
+#   https://wiki.archlinux.org/index.php/GnuPG
+
+*.igloocrypt filter=igloocrypt diff=igloocrypt
+.gitattributes !filter !diff

snowblocks/git/gitconfig

@@ -53,6 +53,9 @@
   tool = intellij
   compactionHeuristic = true
 
+[diff "igloocrypt"]
+  textconv = ".git-diff-igloocrypt"
+
 [difftool "intellij"]
   prompt = true
   cmd = idea diff $(cd $(dirname "$LOCAL") && pwd)/$(basename "$LOCAL") $(cd $(dirname "$REMOTE") && pwd)/$(basename "$REMOTE")
@@ -63,6 +66,10 @@
   stripLeadingSymbols = true
   useUnicodeRuler = true
 
+[filter "igloocrypt"]
+  clean = "gpg --encrypt --recipient 60C54F1519346085"
+  smudge = "gpg --decrypt"
+
 [merge]
   tool = intellij
   ff = false

snowblocks/git/snowblock.json

@@ -4,7 +4,9 @@
   },
   {
     "link": {
+      "~/.gitattributes": null,
       "~/.git-commit-msg": null,
+      "~/.git-diff-igloocrypt": null,
       "~/.gitconfig": null,
       "~/.gitconfig_auth": null,
       "~/.gitconfig_auth_job": null,