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authorMáximo Cuadros <mcuadros@gmail.com>2017-08-22 16:48:35 +0200
committerMáximo Cuadros <mcuadros@gmail.com>2017-08-22 16:48:35 +0200
commitfc560b8c758d064b9f189cfd89b5f6aa3f82872d (patch)
tree4e2b9171b64cae785a58c3f71a2f4b00d65c3b7a /_examples
parentbd81c1f3b5ba3ea22243b8e49ab56dd07a6484d6 (diff)
downloadgo-git-fc560b8c758d064b9f189cfd89b5f6aa3f82872d.tar.gz
_examples: context
Diffstat (limited to '_examples')
-rw-r--r--_examples/README.md1
-rw-r--r--_examples/common_test.go1
-rw-r--r--_examples/context/main.go46
3 files changed, 48 insertions, 0 deletions
diff --git a/_examples/README.md b/_examples/README.md
index 8df7966..10594ab 100644
--- a/_examples/README.md
+++ b/_examples/README.md
@@ -6,6 +6,7 @@ Here you can find a list of annotated _go-git_ examples:
- [showcase](showcase/main.go) - A small showcase of the capabilities of _go-git_
- [open](open/main.go) - Opening a existing repository cloned by _git_
- [clone](clone/main.go) - Cloning a repository
+- [clone with context](context/main.go) - Cloning a repository with graceful cancellation.
- [log](log/main.go) - Emulate `git log` command output iterating all the commit history from HEAD reference
- [remotes](remotes/main.go) - Working with remotes: adding, removing, etc
- [progress](progress/main.go) - Printing the progress information from the sideband
diff --git a/_examples/common_test.go b/_examples/common_test.go
index 955e83e..9eeb643 100644
--- a/_examples/common_test.go
+++ b/_examples/common_test.go
@@ -17,6 +17,7 @@ var defaultURL = "https://github.com/git-fixtures/basic.git"
var args = map[string][]string{
"checkout": []string{defaultURL, tempFolder(), "35e85108805c84807bc66a02d91535e1e24b38b9"},
"clone": []string{defaultURL, tempFolder()},
+ "context": []string{defaultURL, tempFolder()},
"commit": []string{cloneRepository(defaultURL, tempFolder())},
"custom_http": []string{defaultURL},
"open": []string{cloneRepository(defaultURL, tempFolder())},
diff --git a/_examples/context/main.go b/_examples/context/main.go
new file mode 100644
index 0000000..72885ff
--- /dev/null
+++ b/_examples/context/main.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+ "context"
+ "os"
+ "os/signal"
+
+ "gopkg.in/src-d/go-git.v4"
+ . "gopkg.in/src-d/go-git.v4/_examples"
+)
+
+// Gracefull cancellation example of a basic git operation such as Clone.
+func main() {
+ CheckArgs("<url>", "<directory>")
+ url := os.Args[1]
+ directory := os.Args[2]
+
+ // Clone the given repository to the given directory
+ Info("git clone %s %s", url, directory)
+
+ stop := make(chan os.Signal, 1)
+ signal.Notify(stop, os.Interrupt)
+
+ // The context is the mechanism used by go-git, to support deadlines and
+ // cancellation signals.
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel() // cancel when we are finished consuming integers
+
+ go func() {
+ <-stop
+ Warning("\nSignal detected, canceling operation...")
+ cancel()
+ }()
+
+ Warning("To gracefully stop the clone operation, push Crtl-C.")
+
+ // Using PlainCloneContext we can provide to a context, if the context
+ // is cancelled, the clone operation stops gracefully.
+ _, err := git.PlainCloneContext(ctx, directory, false, &git.CloneOptions{
+ URL: url,
+ Progress: os.Stdout,
+ })
+
+ // If the context was cancelled, an error is returned.
+ CheckIfError(err)
+}