From fd67e7033b36d4a0704cf86c90c38b943a65a5d9 Mon Sep 17 00:00:00 2001
From: Bel LaPointe <breel@qualtrics.com>
Date: Thu, 25 Feb 2021 20:19:44 -0600
Subject: [PATCH] making a big file

---
 config/config.go          |   3 +
 versions/max_file_size.go | 116 ++++++++++++++++++++++++++++++++++++++
 versions/versions.go      |   2 +
 3 files changed, 121 insertions(+)
 create mode 100644 versions/max_file_size.go

diff --git a/config/config.go b/config/config.go
index 1963587..7cb90cb 100755
--- a/config/config.go
+++ b/config/config.go
@@ -20,6 +20,7 @@ var (
 	OAuthServer     string
 	VersionInterval time.Duration
 	ReadOnly        bool
+	MaxSizeMB       int
 )
 
 func init() {
@@ -38,6 +39,7 @@ func Refresh() {
 	as.Append(args.STRING, "oauth", "oauth URL", "")
 	as.Append(args.DURATION, "version", "duration to mark versions", "0s")
 	as.Append(args.BOOL, "ro", "read-only mode", false)
+	as.Append(args.INT, "max-v-size", "max size in mb for versioning", 2)
 	if err := as.Parse(); err != nil {
 		panic(err)
 	}
@@ -67,6 +69,7 @@ func Refresh() {
 	OAuthServer = as.GetString("oauth")
 	VersionInterval = as.GetDuration("version")
 	ReadOnly = as.GetBool("ro")
+	MaxSizeMB = as.GetInt("max-v-size")
 }
 
 const defaultWrapper = `
diff --git a/versions/max_file_size.go b/versions/max_file_size.go
new file mode 100644
index 0000000..740904d
--- /dev/null
+++ b/versions/max_file_size.go
@@ -0,0 +1,116 @@
+package versions
+
+import (
+	"fmt"
+	"local/notes-server/config"
+	"strings"
+)
+
+func getScript() string {
+	return strings.ReplaceAll(script, "{{{MAXSIZE}}}", fmt.Sprint(config.MaxSizeMB<<20))
+}
+
+const script = `
+#!/bin/bash -u
+# https://github.com/mgit-at/git-max-filesize/blob/master/pre-receive.sh
+# git-max-filesize
+#
+# git pre-receive hook to reject large files that should be commited
+# via git-lfs (large file support) instead.
+#
+# Author: Christoph Hack <chack@mgit.at>
+# Copyright (c) 2017 mgIT GmbH. All rights reserved.
+# Distributed under the Apache License. See LICENSE for details.
+#
+set -o pipefail
+
+# "5242880" # 5MB
+readonly DEFAULT_MAXSIZE={{{MAXSIZE}}}
+readonly CONFIG_NAME="hooks.maxfilesize"
+readonly NULLSHA="0000000000000000000000000000000000000000"
+readonly EXIT_SUCCESS="0"
+readonly EXIT_FAILURE="1"
+
+# main entry point
+function main() {
+  local status="$EXIT_SUCCESS"
+
+  # get maximum filesize (from repository-specific config)
+  local maxsize
+  maxsize="$(get_maxsize)"
+  if [[ "$?" != 0 ]]; then
+    echo "failed to get ${CONFIG_NAME} from config"
+    exit "$EXIT_FAILURE"
+  fi
+
+  # skip this hook entirely if maxsize is 0.
+  if [[ "$maxsize" == 0 ]]; then
+    cat > /dev/null
+    exit "$EXIT_SUCCESS"
+  fi
+
+  # read lines from stdin (format: "<oldref> <newref> <refname>\n")
+  local oldref
+  local newref
+  local refname
+  while read oldref newref refname; do
+    # skip branch deletions
+    if [[ "$newref" == "$NULLSHA" ]]; then
+      continue
+    fi
+
+    # find large objects
+    # check all objects from $oldref (possible $NULLSHA) to $newref, but
+    # skip all objects that have already been accepted (i.e. are referenced by
+    # another branch or tag).
+    local target
+    if [[ "$oldref" == "$NULLSHA" ]]; then
+      target="$newref"
+    else
+      target="${oldref}..${newref}"
+    fi
+    local large_files
+    large_files="$(git rev-list --objects "$target" --not --branches=\* --tags=\* | \
+      git cat-file $'--batch-check=%(objectname)\t%(objecttype)\t%(objectsize)\t%(rest)' | \
+      awk -F '\t' -v maxbytes="$maxsize" '$3 > maxbytes' | cut -f 4-)"
+    if [[ "$?" != 0 ]]; then
+      echo "failed to check for large files in ref ${refname}"
+      continue
+    fi
+
+    IFS=$'\n'
+    for file in $large_files; do
+      if [[ "$status" == 0 ]]; then
+        echo ""
+        echo "-------------------------------------------------------------------------"
+        echo "Your push was rejected because it contains files larger than $(numfmt --to=iec "$maxsize")."
+        echo "Please use https://git-lfs.github.com/ to store larger files."
+        echo "-------------------------------------------------------------------------"
+        echo ""
+        echo "Offending files:"
+        status="$EXIT_FAILURE"
+      fi
+      echo " - ${file} (ref: ${refname})"
+    done
+    unset IFS
+  done
+
+  exit "$status"
+}
+
+# get the maximum filesize configured for this repository or the default
+# value if no specific option has been set. Suffixes like 5k, 5m, 5g, etc.
+# can be used (see git config --int).
+function get_maxsize() {
+  local value;
+  value="$(git config --int "$CONFIG_NAME")"
+  if [[ "$?" != 0 ]] || [[ -z "$value" ]]; then
+    echo "$DEFAULT_MAXSIZE"
+    return "$EXIT_SUCCESS"
+  fi
+  echo "$value"
+  return "$EXIT_SUCCESS"
+}
+
+main
+`
diff --git a/versions/versions.go b/versions/versions.go
index a61b5f4..81a53bf 100755
--- a/versions/versions.go
+++ b/versions/versions.go
@@ -15,6 +15,8 @@ func New() (*Versions, error) {
 	v.cmd("git", "init")
 	v.cmd("git", "config", "user.email", "user@user.user")
 	v.cmd("git", "config", "user.name", "user")
+	s := getScript()
+	panic(s)
 	return v, nil
 }