Git Objects

• Git object are stored in compressed binary format and cannot be read directly (E.g., cat command)

• Git object hash generation

• The git object is the object type + empty space + object length + delimiter + content
• The hash is generated based on the input fo the whole object

Objects types

• Blob
• Stores any file of any type
• Store the raw content but no filename or structure
• Tree
• Information about files
• Create pointers to other objects
• Commit
• Info about author, name, email, description and parent
• Allow storing different versions of the project
• It has a pointer to a specific tree in the database. It's a wrapper around tree object
• Moving to different commits is the same as checking out
• To create a new commit, there must be change in the staging area
• Annotated Tag
• Text pointer to a specific commit

Object permissions

• 040000: Directory
• 100644: Regular non-executable file
• 100664: Regular non-excutable group-writeable file
• 100755: Regular executable file
• 120000: Symbolic link
• 160000: Gitlink