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-Git sha1 computation
---------------------
-
-Document to describe how the git sha1 computation takes place.
-
-### commit/revision
-
-sha1 git commit/revision computation:
-
-    commit `size`\0
-    tree `sha1-git-tree-and-subtree-in-plain-hex-string`
-    (parent `commit-parent`)
-    author `name` <`email`> `date-ts` `date-offset`
-    committer `name` <`email`> `date-ts` `date-offset`
-
-    `commit-message`
-
-
-Notes:
-- () denotes optional entry. Indeed, first commit does not contain any parent commit.
-- empty line at the end of the commit message
-- timestamp example: 1444054085
-- date offset for example: +0200
-
-### directory/tree
-
-sha1 git directory/tree computation:
-
-    tree `tree-size`\0
-    <file-perm> <file-name>\0<file-sha1-in-20-bytes-string>...<dir-perm> <dir-name>\0<dir-sha1-in-20-bytes-string>...
-
-
-Notes:
-- no newline separator between tree entries
-- no empty newline at the end of the tree entries
-- tree content header size is the length of the content
-- The tree entries are ordered according to bytes in their <name> properties.
-
-Note: Tree entries referencing trees are sorted as if their name have a trailing /
-at their end.
-
-Possible permissions are:
-- 100644 - file
-- 40000  - directory
-- 100755 - executable file
-- 120000 - symbolink link
-- 160000 - git link (relative to submodule)
-
-### content/file
-
-sha1 git content computation:
-
-    blob `blob-size`\0
-    `blob-content`
-
-Notes:
-- no newline at the end of the blob content
-
-Compress with DEFLATE and compute sha1