diff options
| -rw-r--r-- | .SRCINFO | 6 | ||||
| -rw-r--r-- | PKGBUILD | 6 | ||||
| -rw-r--r-- | get-docker-cache-id.go | 82 |
3 files changed, 47 insertions, 47 deletions
@@ -1,7 +1,7 @@ pkgbase = mkinitcpio-docker-hooks pkgdesc = mkinitcpio hooks that provides support for using docker image as root - pkgver = 1.1 - pkgrel = 3 + pkgver = 1.2 + pkgrel = 1 url = https://github.com/zasdfgbnm/mkinitcpio-docker-hooks arch = any groups = base @@ -16,7 +16,7 @@ pkgbase = mkinitcpio-docker-hooks md5sums = 5ce9a3498b0af7e9fbbe830893da83e3 md5sums = b44c59a25ef2ff74e60d20aaabe683fd md5sums = 4df2fd7306aef1e3d94ffc6b05056728 - md5sums = bcae1950b172498e34c1aa4cb55ecad0 + md5sums = cdfc2b962060921d415134192a540dd1 pkgname = mkinitcpio-docker-hooks @@ -1,8 +1,8 @@ # Maintainer: Xiang Gao <qasdfgtyuiop at gmail dot com> pkgname=mkinitcpio-docker-hooks -pkgver=1.1 -pkgrel=3 +pkgver=1.2 +pkgrel=1 pkgdesc="mkinitcpio hooks that provides support for using docker image as root" arch=(any) url="https://github.com/zasdfgbnm/mkinitcpio-docker-hooks" @@ -15,7 +15,7 @@ source=('install_docker-btrfs' 'hooks_docker-btrfs' 'etc_docker-btrfs.json' 'get md5sums=('5ce9a3498b0af7e9fbbe830893da83e3' 'b44c59a25ef2ff74e60d20aaabe683fd' '4df2fd7306aef1e3d94ffc6b05056728' - 'bcae1950b172498e34c1aa4cb55ecad0') + 'cdfc2b962060921d415134192a540dd1') build() { go build get-docker-cache-id.go diff --git a/get-docker-cache-id.go b/get-docker-cache-id.go index cbaf367cda6a..e14e1877105e 100644 --- a/get-docker-cache-id.go +++ b/get-docker-cache-id.go @@ -3,17 +3,17 @@ package main import ( "encoding/json" "fmt" + "io/ioutil" "os" "strings" - "io/ioutil" ) -const DOCKER_DB_DIR = "/var/lib/docker/image/btrfs" -const REPO_FILE = DOCKER_DB_DIR + "/repositories.json" -const CFG_FILE = "/etc/docker-btrfs.json" +const dockerDbDir = "/var/lib/docker/image/btrfs" +const repoFile = dockerDbDir + "/repositories.json" +const cfgFile = "/etc/docker-btrfs.json" func getImageTag() (string, string) { - buf, err := ioutil.ReadFile(CFG_FILE) + buf, err := ioutil.ReadFile(cfgFile) if err != nil { panic(err) } @@ -25,8 +25,8 @@ func getImageTag() (string, string) { return dat["docker_image"].(string), dat["docker_tag"].(string) } -func getImageId(image string, tag string) string { - buf, err := ioutil.ReadFile(REPO_FILE) +func getImageID(image string, tag string) string { + buf, err := ioutil.ReadFile(repoFile) if err != nil { panic(err) } @@ -40,9 +40,9 @@ func getImageId(image string, tag string) string { return imageTags[image+":"+tag].(string) } -func getDiffIds(imgId string) []string { - imgPath := strings.Replace(imgId, ":", "/", 1) - buf, err := ioutil.ReadFile(DOCKER_DB_DIR + "/imagedb/content/" + imgPath) +func getDiffIDs(imgID string) []string { + imgPath := strings.Replace(imgID, ":", "/", 1) + buf, err := ioutil.ReadFile(dockerDbDir + "/imagedb/content/" + imgPath) if err != nil { panic(err) } @@ -52,39 +52,39 @@ func getDiffIds(imgId string) []string { panic(err) } rootfs := dat["rootfs"].(map[string]interface{}) - diffIdsInterface := rootfs["diff_ids"].([]interface{}) - diffIdsStr := make([]string, len(diffIdsInterface)) - for i, v := range diffIdsInterface { - diffIdsStr[i] = strings.Replace(v.(string), "sha256:", "", 1) + diffIDsInterface := rootfs["diff_ids"].([]interface{}) + diffIDsStr := make([]string, len(diffIDsInterface)) + for i, v := range diffIDsInterface { + diffIDsStr[i] = strings.Replace(v.(string), "sha256:", "", 1) } - return diffIdsStr + return diffIDsStr } -type Node struct { +type node struct { parent string - id string - diff string - cache string + id string + diff string + cache string } -func getNode(id string) Node { - var node Node +func getNode(id string) node { + var node node node.id = id - buf, err := ioutil.ReadFile(DOCKER_DB_DIR + "/layerdb/sha256/" + id + "/cache-id") + buf, err := ioutil.ReadFile(dockerDbDir + "/layerdb/sha256/" + id + "/cache-id") if err != nil { panic(err) } node.cache = strings.Replace(string(buf), "sha256:", "", 1) - buf, err = ioutil.ReadFile(DOCKER_DB_DIR + "/layerdb/sha256/" + id + "/diff") + buf, err = ioutil.ReadFile(dockerDbDir + "/layerdb/sha256/" + id + "/diff") if err != nil { panic(err) } node.diff = strings.Replace(string(buf), "sha256:", "", 1) - buf, err = ioutil.ReadFile(DOCKER_DB_DIR + "/layerdb/sha256/" + id + "/parent") + buf, err = ioutil.ReadFile(dockerDbDir + "/layerdb/sha256/" + id + "/parent") if os.IsNotExist(err) { node.parent = "" } else if err != nil { @@ -95,22 +95,22 @@ func getNode(id string) Node { return node } -func readLayerInfo() map[string]Node { - files, err := ioutil.ReadDir(DOCKER_DB_DIR + "/layerdb/sha256/") - if err != nil { - panic(err) +func readLayerInfo() map[string]node { + files, err := ioutil.ReadDir(dockerDbDir + "/layerdb/sha256/") + if err != nil { + panic(err) } - nodes := make(map[string]Node) - for i, _ := range files { + nodes := make(map[string]node) + for i := range files { id := files[i].Name() nodes[id] = getNode(id) } return nodes } -func searchForCacheId(diffIds []string, layers map[string]Node) string { +func searchForCacheID(diffIDs []string, layers map[string]node) string { candidates := make([]string, 0, len(layers)) - last := diffIds[len(diffIds)-1] + last := diffIDs[len(diffIDs)-1] for i, v := range layers { if v.diff == last { sz := len(candidates) @@ -122,28 +122,28 @@ func searchForCacheId(diffIds []string, layers map[string]Node) string { for i, v := range candidates { candidatesCurrent[i] = layers[v].parent } - for i := len(diffIds)-2; i>=0; i-- { + for i := len(diffIDs) - 2; i >= 0; i-- { for j := 0; j < len(candidates); { - if layers[candidatesCurrent[j]].diff == diffIds[i] { + if layers[candidatesCurrent[j]].diff == diffIDs[i] { candidatesCurrent[j] = layers[candidatesCurrent[j]].parent - j++; + j++ } else { oldLen := len(candidates) candidates[j] = candidates[oldLen-1] candidatesCurrent[j] = candidatesCurrent[oldLen-1] candidates = candidates[:oldLen-1] - candidatesCurrent = candidatesCurrent[:oldLen - 1] + candidatesCurrent = candidatesCurrent[:oldLen-1] } } } - return candidates[0] + return layers[candidates[0]].cache } func main() { image, tag := getImageTag() - imgId := getImageId(image, tag) - diffIds := getDiffIds(imgId) + imgID := getImageID(image, tag) + diffIDs := getDiffIDs(imgID) layers := readLayerInfo() - cacheId := searchForCacheId(diffIds, layers) - fmt.Print(cacheId) + cacheID := searchForCacheID(diffIDs, layers) + fmt.Print(cacheID) } |