Implemented docker for gitcache (#231)

* Implemented caching the git folder instead of just a branch. Implemented logging. Refactored code. * Feat - Implemented docker for gitcache
2024-09-11 08:55:27 +03:00 · 2021-03-03 22:22:17 -05:00 · 2021-03-03 22:22:17 -05:00 · 3e979657bf
commit 3e979657bf
parent b4c2e4fd13
11 changed files with 621 additions and 97 deletions
--- a/.github/workflows/gitcache-docker.yaml
+++ b/.github/workflows/gitcache-docker.yaml
@ -0,0 +1,52 @@
+name: Docker
+on:
+  push:
+    branches:
+      - main
+    # Publish `v1.2.3` tags as releases.
+    tags:
+      - v*
+  # Run tests for any PRs.
+  pull_request:
+env:
+  IMAGE_NAME: gitcache
+
+jobs:
+  # Push image to GitHub Packages.
+  push:
+
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Build image
+        run: docker build . --file ./gitcache/Dockerfile --tag $IMAGE_NAME
+
+      - name: Log into registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+
+      - name: Push image
+        run: |
+          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
+
+          # Change all uppercase to lowercase
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "main" ] && VERSION=latest
+
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION
+
+
--- a/.gitignore
+++ b/.gitignore
@ -1,5 +1,7 @@
-# Scorecard binary.
+# binary.
 scorecard
+gitblobcache
+

 # Binaries for programs and plugins.
 *.exe
--- a/gitcache/.golangci.yml
+++ b/gitcache/.golangci.yml
@ -0,0 +1,142 @@
+---
+run:
+  concurrency: 6
+  deadline: 5m
+linters:
+  disable-all: true
+  enable:
+    - asciicheck
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - dupl
+    - errcheck
+    - exhaustive
+    - exportloopref
+    - gochecknoinits
+    - gocognit
+    - goconst
+    - gocritic
+    - gocyclo
+    - godot
+    - godox
+    - goerr113
+    - gofmt
+    - gofumpt
+    - goheader
+    - goimports
+    - golint
+    - gomnd
+    - gomodguard
+    - goprintffuncname
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - nestif
+    - noctx
+    - nolintlint
+    - paralleltest
+    - prealloc
+    - predeclared
+    - rowserrcheck
+    - scopelint
+    - sqlclosecheck
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - thelper
+    - tparallel
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+    - whitespace
+    - wrapcheck
+linters-settings:
+  errcheck:
+    check-type-assertions: true
+    check-blank: true
+  govet:
+    enable:
+      - fieldalignment
+  godox:
+    keywords:
+      - BUG
+      - FIXME
+      - HACK
+  gocritic:
+    enabled-checks:
+      # Diagnostic
+      - appendAssign
+      - argOrder
+      - badCond
+      - caseOrder
+      - codegenComment
+      - commentedOutCode
+      - deprecatedComment
+      - dupArg
+      - dupBranchBody
+      - dupCase
+      - dupSubExpr
+      - exitAfterDefer
+      - flagDeref
+      - flagName
+      - nilValReturn
+      - offBy1
+      - sloppyReassign
+      - weakCond
+      - octalLiteral
+
+      # Performance
+      - appendCombine
+      - equalFold
+      - hugeParam
+      - indexAlloc
+      - rangeExprCopy
+      - rangeValCopy
+
+      # Style
+      - assignOp
+      - boolExprSimplify
+      - captLocal
+      - commentFormatting
+      - commentedOutImport
+      - defaultCaseOrder
+      - docStub
+      - elseif
+      - emptyFallthrough
+      - emptyStringTest
+      - hexLiteral
+      - ifElseChain
+      - methodExprCall
+      - regexpMust
+      - singleCaseSwitch
+      - sloppyLen
+      - stringXbytes
+      - switchTrue
+      - typeAssertChain
+      - typeSwitchVar
+      - underef
+      - unlabelStmt
+      - unlambda
+      - unslice
+      - valSwap
+      - wrapperFunc
+      - yodaStyleExpr
+
+      # Opinionated
+      - builtinShadow
+      - importShadow
+      - initClause
+      - nestingReduce
+      - paramTypeCombine
+      - ptrToRefParam
+      - typeUnparen
+      - unnamedResult
+      - unnecessaryBlock
--- a/gitcache/Dockerfile
+++ b/gitcache/Dockerfile
@ -0,0 +1,31 @@
+# Copyright 2020 Security Scorecard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# syntax = docker/dockerfile:1-experimental
+
+FROM  golang:1.16 as base
+WORKDIR /src
+ENV CGO_ENABLED=0
+COPY go.* ./
+RUN go mod download
+COPY . ./
+
+FROM base AS build
+ARG TARGETOS
+ARG TARGETARCH
+RUN --mount=type=cache,target=/root/.cache/go-build  CGO_ENABLED=0 go build -a -tags netgo -ldflags '-w -extldflags "-static"' -o /out/gitblobcache .
+
+FROM gcr.io/distroless/base:nonroot
+COPY --from=build /out/gitblobcache /
+ENTRYPOINT [ "/scorecard" ]
--- a/gitcache/Makefile
+++ b/gitcache/Makefile
@ -0,0 +1,32 @@
+SHELL := /bin/bash
+IMAGE_NAME = gitcache
+.PHONY: help
+help:  ## Display this help
+	@awk \
+		-v "col=${COLOR}" -v "nocol=${NOCOLOR}" \
+		' \
+			BEGIN { \
+				FS = ":.*##" ; \
+				printf "Available targets:\n"; \
+			} \
+			/^[a-zA-Z0-9_-]+:.*?##/ { \
+				printf "  %s%-25s%s %s\n", col, $$1, nocol, $$2 \
+			} \
+			/^##@/ { \
+				printf "\n%s%s%s\n", col, substr($$0, 5), nocol \
+			} \
+		' $(MAKEFILE_LIST)
+
+all:  ## Runs build
+.PHONY: all
+all: build 
+
+.PHONY: build
+build: ## Runs go build and generates executable
+	CGO_ENABLED=0 go build -a -ldflags '-w -extldflags "-static"' -o gitblobcache
+
+.phony: dockerbuild
+dockerbuild: ## runs docker build
+	$(call ndef, github_auth_token)
+	docker build .  --tag $(IMAGE_NAME)
+
--- a/gitcache/blob.go
+++ b/gitcache/blob.go
@ -33,14 +33,14 @@ func (c *Cache) Set(key string, resp []byte) error {
 	return c.Bucket.WriteAll(context.Background(), key, resp, nil)
 }

-// Delete removes key from the cache.The error is not returned to maintain compatability
+// Delete removes key from the cache.The error is not returned to maintain compatibility
 // with the httpcache Cache interface.
 func (c *Cache) Delete(key string) error {
 	return c.Bucket.Delete(context.Background(), key)
 }

-// New opens the bucket for caching.
-func New(bucketKey string) (*Cache, error) {
+// NewBucket opens the bucket for caching.
+func NewBucket(bucketKey string) (*Cache, error) {
 	b, err := blob.OpenBucket(context.Background(), bucketKey)
 	if err != nil {
 		return nil, errors.Wrap(err, fmt.Sprintf("error in opening the bucket %s", bucketKey))
--- a/gitcache/go.mod
+++ b/gitcache/go.mod
@ -8,6 +8,7 @@ require (
 	github.com/mholt/archiver v3.1.1+incompatible
 	github.com/pierrec/lz4 v2.6.0+incompatible // indirect
 	github.com/pkg/errors v0.9.1
+	go.uber.org/zap v1.16.0
 	gocloud.dev v0.22.0
 )

--- a/gitcache/go.sum
+++ b/gitcache/go.sum
@ -1,3 +1,4 @@
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@ -143,23 +183,36 @@ github.com/go-git/go-git-fixtures/v4 v4.0.2-0.20200613231340-f56387b50c12 h1:PbK
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@ -171,6 +224,7 @@ github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFU
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@ -190,6 +244,7 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
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@ -205,6 +260,7 @@ github.com/google/go-replayers/grpcreplay v1.0.0 h1:B5kVOzJ1hBgnevTgIWhSTatQ3608
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@ -220,8 +276,11 @@ github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hf
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@ -323,6 +408,7 @@ github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMx
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+go.uber.org/zap v1.16.0 h1:uFRZXykJGK9lLY4HtgSw44DnIcAM+kRBP7x5m+NpAOM=
+go.uber.org/zap v1.16.0/go.mod h1:MA8QOfq0BHJwdXa996Y4dYkAqRKB8/1K1QMMZVaNZjQ=
 gocloud.dev v0.22.0 h1:psFb4EJ+bF9bjns7XR3n3tMMMB1LNs97YURcyh4oVWM=
 gocloud.dev v0.22.0/go.mod h1:z3jKIQ0Es9LALVZFQ3wOvwqAsSLq1R5c/2RdmghDucw=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@ -355,8 +449,10 @@ golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
+golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6 h1:QE6XYQK6naiK1EPAe1g/ILLxN5RBoH5xkJk3CqlMI/Y=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
+golang.org/x/image v0.0.0-20190802002840-cff245a6509b h1:+qEpEAPhDZ1o0x3tHzZTQDArnOixOzGD9HUJfcg0mb4=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
@ -370,6 +466,7 @@ golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPI
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
+golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028 h1:4+4C/Iv2U4fMZBiMCc98MG1In4gJY5YRhtpDNeDeHWs=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
@ -431,6 +528,7 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@ -481,6 +579,7 @@ golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e h1:EHBhcS0mlXEAVwNyO2dLfjToGsyY4j24pTs2ScHnX7s=
 golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@ -499,6 +598,8 @@ golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191010075000-0337d82405ff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@ -644,8 +745,11 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0 h1:0vLT13EuvQ0hNvakwLuFZ/jYrLp5F3kcWHXdRggjCE8=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
 gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
@ -662,8 +766,13 @@ honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4 h1:UoveltGrhghAA7ePc+e+QYDHXrBps2PqFZiHkGR/xK8=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+nhooyr.io/websocket v1.8.6 h1:s+C3xAMLwGmlI31Nyn/eAehUlZPwfYZu2JXM621Q5/k=
 nhooyr.io/websocket v1.8.6/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0=
+rsc.io/binaryregexp v0.2.0 h1:HfqmD5MEmC0zvwBuF187nq9mdnXjXsSivRiXN7SmRkE=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0 h1:9JKUTTIUgS6kzR9mK1YuGKv6Nl+DijDNIc0ghT58FaY=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0 h1:7uVkIFmeBqHfdjD+gZwtXXI+RODJ2Wc4O7MPEh/QiW4=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
--- a/gitcache/main.go
+++ b/gitcache/main.go
@ -4,139 +4,187 @@ import (
 	"fmt"
 	"io/ioutil"
 	"log"
-	"net/url"
 	"os"
 	"path"
-	"strings"
 	"time"

 	"github.com/go-git/go-git/v5"
 	"github.com/mholt/archiver"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
 )

 func main() {
+	const gittar string = "gitfolder.tar.gz"
+	var gitRepo *git.Repository
+
+	logLevel := zap.LevelFlag("verbosity", zap.InfoLevel, "override the default log level")
+
+	cfg := zap.NewProductionConfig()
+	cfg.Level.SetLevel(*logLevel)
+	logger, err := cfg.Build()
+	if err != nil {
+		log.Panic(err)
+	}
+	//nolint
+	defer logger.Sync() // flushes buffer, if any
+	sugar := logger.Sugar()
 	blob := os.Getenv("BLOB_URL")
+	sugar.Info("BLOB_URL ", blob)

 	if blob == "" {
-		log.Panic("BLOB_URL env is not set.")
-	}
-
-	repo := &RepoURL{}
-	err := repo.Set(os.Args[1])
-	if err != nil {
-		log.Panic(err)
-	}
-
-	cwd, err := os.Getwd()
-	if err != nil {
-		log.Panic(err)
-	}
-
-	dir, err := ioutil.TempDir(path, repo.Owner+repo.Owner)
-	if err != nil {
-		log.Panic(err)
-	}
-
-	tarDir, err := ioutil.TempDir(cwd, repo.Owner+repo.Owner+"tar")
-	if err != nil {
-		log.Panic(err)
-	}
-
-	defer os.RemoveAll(dir)
-	defer os.RemoveAll(tarDir)
-
-	// Clone the given repository to the given directory
-	r, err := git.PlainClone(dir, false, &git.CloneOptions{
-		URL:   fmt.Sprintf("http://%s/%s/%s", repo.Host, repo.Owner, repo.Repo),
-		Depth: 1, // Just fetch the last commit
-	})
-	if err != nil {
-		log.Panic(err)
-	}
-	lastRef, err := r.Head()
-	if err != nil {
-		log.Panic(err)
-	}
-
-	commit, err := r.CommitObject(lastRef.Hash())
-	if err != nil {
-		log.Panic(err)
+		sugar.Panic("BLOB_URL env is not set.")
 	}

 	// opening the blob
-	bucket, err := New(blob)
+	bucket, e := NewBucket(blob)
+	if e != nil {
+		sugar.Panic(e)
+	}
+
+	sugar.Debugf("The bucket was opened %s", blob)
+
+	repo := RepoURL{}
+	err = repo.Set(os.Args[1])
+	if err != nil {
+		sugar.Panic(err)
+	}
+
+	sugar.Debugf("Fetching %+v", repo)
+
+	// gets all the path configuration.
+	storage, err := getStoragePath(repo)
+	if err != nil {
+		sugar.Panic(err)
+	}
+
+	defer storage.Cleanup()
+
+	alreadyUptoDate := false
+	// checks if there is an existing git repo in the bucket
+	if data, exists := bucket.Get(storage.BlobGitFolderPath); exists {
+		sugar.Info("bucket ", blob, " already has git folder")
+		gitRepo, alreadyUptoDate, err = fetchGitRepo(&storage, data)
+	} else {
+		sugar.Info("bucket ", blob, " does not have a git folder")
+		gitRepo, err = cloneGitRepo(&storage, repo)
+	}
+
+	if err != nil {
+		sugar.Panic(err)
+	}
+
+	// case where the git repository hasn't changed and it need not be updated into the blob
+	if alreadyUptoDate {
+		sugar.Info("bucketb ", blob, " git folder is already up to date.")
+		// Just update the last sync time and return
+		err = bucket.Set(storage.BlobLastSyncPath, []byte(fmt.Sprintf("%64b", time.Now().Unix())))
+		if err != nil {
+			sugar.Panic(err)
+		}
+		sugar.Info("Finished processing ", repo)
+		return
+	}
+
+	lastRef, err := gitRepo.Head()
+	if err != nil {
+		sugar.Panic(err)
+	}
+
+	commit, err := gitRepo.CommitObject(lastRef.Hash())
+	if err != nil {
+		sugar.Panic(err)
+	}
+
+	data, err := archiveFolder(storage.GitDir, storage.GitTarFile)
 	if err != nil {
 		log.Panic(err)
 	}

-	archivePath := path.Join(tarDir, fmt.Sprintf("%s.tar.gz", repo.Repo))
-	// storing the last commit to the blob
-	err = bucket.Set(fmt.Sprintf("gitcache/%s/%s/lastcommit", repo.Owner, repo.Repo), []byte(fmt.Sprintf("%64b\n", commit.Author.When.Unix())))
-	if err != nil {
-		log.Panic(err)
-	}
-
-	now := time.Now().Unix()
-	err = bucket.Set(fmt.Sprintf("gitcache/%s/%s/lastsync", repo.Owner, repo.Repo), []byte(fmt.Sprintf("%64b\n", now)))
+	err = bucket.Set(storage.BlobGitFolderPath, data)
 	if err != nil {
 		log.Panic(err)
 	}

 	// removing the .git folder as it is not required for the tar ball
-	err = os.RemoveAll(path.Join(dir, ".git"))
+	err = os.RemoveAll(path.Join(storage.GitDir, ".git"))
 	if err != nil {
 		log.Panic(err)
 	}

-	// creating an archive
-	archive := archiver.NewTarGz()
-
-	err = archive.Archive([]string{dir}, archivePath)
+	data, err = archiveFolder(storage.GitDir, storage.BlobArchiveFile)
 	if err != nil {
 		log.Panic(err)
 	}

+	err = bucket.Set(storage.BlobArchivePath, data)
+	if err != nil {
+		log.Panic(err)
+	}
+
+	sugar.Info("Storing the last commit ", commit.Author.When)
+	// storing the last commit to the blob
+	err = bucket.Set(storage.BlobLastCommitPath, []byte(fmt.Sprintf("%64b", commit.Author.When.Unix())))
+	if err != nil {
+		log.Panic(err)
+	}
+	err = bucket.Set(storage.BlobLastSyncPath, []byte(fmt.Sprintf("%64b", time.Now().Unix())))
+	if err != nil {
+		log.Panic(err)
+	}
+	sugar.Info("Finished processing for the first time ", repo)
+}
+
+// clones the repository if it does not exists. If the git repo already exists then it fetches from the remote.
+func cloneGitRepo(storagePath *StoragePath, repo RepoURL) (*git.Repository, error) {
+	// Clone the given repository to the given directory
+	gitRepo, err := git.PlainClone(storagePath.GitDir, false, &git.CloneOptions{
+		URL: fmt.Sprintf("http://%s/%s/%s", repo.Host, repo.Owner, repo.Repo),
+	})
+	if err != nil {
+		return nil, errors.Wrapf(err, "unable to clone %+v", repo)
+	}
+	return gitRepo, nil
+}
+
+func archiveFolder(folderToArchive, archivePath string) ([]byte, error) {
+	tarformat := archiver.DefaultTarGz
+	err := tarformat.Archive([]string{folderToArchive}, archivePath)
+	if err != nil {
+		return nil,
+			errors.Wrapf(err, "unable to read the archive the folder %s to the archive path %s", folderToArchive, archivePath)
+	}
+
 	data, err := ioutil.ReadFile(archivePath)
 	if err != nil {
-		log.Panic(err)
+		return nil, errors.Wrapf(err, "unable to read the archive file %s", archivePath)
 	}
+	return data, nil
+}

-	// storing the archive to the blob
-	err = bucket.Set(fmt.Sprintf("gitcache/%s/%s/tar", repo.Owner, repo.Repo), data)
+// fetchGitRepo fetches the git repo. Returns git repository, bool if it is already up to date and error.
+func fetchGitRepo(storagePath *StoragePath, data []byte) (*git.Repository, bool, error) {
+	const fileMode os.FileMode = 0600
+	if err := ioutil.WriteFile("gitfolder.tar.gz", data, fileMode); err != nil {
+		return nil, false, errors.Wrapf(err, "unable write targz file %s", storagePath.BlobArchiveFile)
+	}
+	if err := archiver.Unarchive("gitfolder.tar.gz", storagePath.GitDir); err != nil {
+		return nil, false,
+			errors.Wrapf(err, "unable unarchive targz file %s in %s", storagePath.BlobArchiveFile, storagePath.BlobArchiveDir)
+	}
+	p := path.Join(storagePath.GitDir, storagePath.GitDir)
+	gitRepo, err := git.PlainOpen(p)
 	if err != nil {
-		log.Panic(err)
+		return nil, false, errors.Wrapf(err, "unable to open the git dir %s", p)
 	}
-}
-
-type RepoURL struct {
-	Host, Owner, Repo string
-}
-
-func (r *RepoURL) String() string {
-	return fmt.Sprintf("%s/%s/%s", r.Host, r.Owner, r.Repo)
-}
-
-func (r *RepoURL) Type() string {
-	return "repo"
-}
-
-func (r *RepoURL) Set(s string) error {
-	// Allow skipping scheme for ease-of-use, default to https.
-	if !strings.Contains(s, "://") {
-		s = "https://" + s
+	err = gitRepo.Fetch(&git.FetchOptions{RemoteName: "origin"})
+	// the repo is up to date and can return
+	if errors.Is(err, git.NoErrAlreadyUpToDate) {
+		return gitRepo, true, nil
 	}

-	parsedURL, err := url.Parse(s)
 	if err != nil {
-		return err
+		return nil, false, errors.Wrap(err, "unable to fetch from git repo")
 	}
-
-	const splitLen = 2
-	split := strings.SplitN(strings.Trim(parsedURL.Path, "/"), "/", splitLen)
-	if len(split) != splitLen {
-		log.Fatalf("invalid repo flag: [%s], pass the full repository URL", s)
-	}
-
-	r.Host, r.Owner, r.Repo = parsedURL.Host, split[0], split[1]
-	return nil
+	return gitRepo, false, nil
 }
--- a/gitcache/repourl.go
+++ b/gitcache/repourl.go
@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/url"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+// RepoURL parses and stores URL into fields.
+type RepoURL struct {
+	Host  string // Host where the repo is stored. Example GitHub.com
+	Owner string // Owner of the repo. Example ossf.
+	Repo  string // The actual repo. Example scorecard.
+}
+
+func (r *RepoURL) String() string {
+	return fmt.Sprintf("%s/%s/%s", r.Host, r.Owner, r.Repo)
+}
+
+func (r *RepoURL) Set(s string) error {
+	// Allow skipping scheme for ease-of-use, default to https.
+	if !strings.Contains(s, "://") {
+		s = "https://" + s
+	}
+
+	parsedURL, err := url.Parse(s)
+	if err != nil {
+		return errors.Wrap(err, "unable to parse the URL")
+	}
+
+	const splitLen = 2
+	split := strings.SplitN(strings.Trim(parsedURL.Path, "/"), "/", splitLen)
+	if len(split) != splitLen {
+		log.Fatalf("invalid repo flag: [%s], pass the full repository URL", s)
+	}
+
+	r.Host, r.Owner, r.Repo = parsedURL.Host, split[0], split[1]
+	return nil
+}
--- a/gitcache/storagepath.go
+++ b/gitcache/storagepath.go
@ -0,0 +1,65 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+
+	"github.com/pkg/errors"
+)
+
+type StoragePath struct {
+	BucketPath         string // name of the bucket that is going store the content
+	GitDir             string // directory in which the git folder would be used for pull/clone
+	GitTarDir          string // directory for tar/gzip the git folder
+	GitTarFile         string // the tar file name for the git folder
+	BlobArchiveDir     string // directory which is going archive the git folder without .git
+	BlobArchiveFile    string // the tar file for the git folder without  .git
+	BlobLastCommitPath string // blob path for storing the last commit
+	BlobLastSyncPath   string // blob path for storing the lasy sync time
+	BlobGitFolderPath  string // blob path for storing the GitTarFile
+	BlobArchivePath    string // blob path for storing the archive file BlobArchiveFile
+}
+
+// getStoragePath returns path for blob, archiving and also creates temp directories for archiving.
+func getStoragePath(repo RepoURL) (StoragePath, error) {
+	cwd, err := os.Getwd()
+	if err != nil {
+		return StoragePath{}, errors.Wrap(err, "unable to the current working dir")
+	}
+
+	bucketPath := fmt.Sprintf("gitcache/%s/%s/%s", repo.Host, repo.Owner, repo.Repo)
+	gitDir := repo.Host + repo.Owner + repo.Repo
+
+	err = os.Mkdir(gitDir, 0755)
+	if err != nil {
+		return StoragePath{}, errors.Wrapf(err, "unable to create temp directory %s", gitDir)
+	}
+	gitTarPath := path.Join(gitDir, "gitfolder.tar.gz")
+
+	blobArchiveDir, err := ioutil.TempDir(cwd, gitDir+"tar")
+	if err != nil {
+		return StoragePath{}, errors.Wrapf(err, "unable to create temp directory %s", gitDir+"tar")
+	}
+	blobArchivePath := path.Join(blobArchiveDir, fmt.Sprintf("%s.tar.gz", repo.Repo))
+
+	return StoragePath{
+		BucketPath:         bucketPath,
+		GitDir:             gitDir,
+		GitTarFile:         gitTarPath,
+		BlobArchiveDir:     blobArchiveDir,
+		BlobArchiveFile:    blobArchivePath,
+		BlobLastCommitPath: fmt.Sprintf("%s/lastcommit", bucketPath),
+		BlobLastSyncPath:   fmt.Sprintf("%s/lastsync", bucketPath),
+		BlobGitFolderPath:  fmt.Sprintf("%s/gitfolder", bucketPath),
+		BlobArchivePath:    fmt.Sprintf("%s/tar", bucketPath),
+	}, nil
+}
+
+// Cleanup removes the directories that were created.
+func (s *StoragePath) Cleanup() {
+	os.RemoveAll(s.GitDir)
+	os.RemoveAll(s.GitTarDir)
+	os.RemoveAll(s.BlobArchiveDir)
+}