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walk: implement FsEval hooks

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In certain circumstances (such as the manifest generation of a
filesystem as an unprivileged user) it is important to provide hooks
that override the default os.* implementation of filesystem-related
functions.

In order to avoid merging too much code from outside projects (such as
umoci) this is implemented by providing FsEval hooks to Walk() and
Check(). This allows for users of go-mtree to modify how filesystem
checks are done, without compromising the simplicity of go-mtree's code.

Signed-off-by: Aleksa Sarai <asarai@suse.de>
This commit is contained in:
Aleksa Sarai 2016-11-18 18:53:26 +11:00
parent 98824a87da
commit e22043cb86
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GPG key ID: 9E18AA267DDB8DB4
9 changed files with 110 additions and 57 deletions
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22
compare_test.go
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@ -15,12 +15,12 @@ import (
// simple walk of current directory, and imediately check it.
// may not be parallelizable.
func TestCompare(t *testing.T) {
old, err := Walk(".", nil, append(DefaultKeywords, "sha1"))
old, err := Walk(".", nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
new, err := Walk(".", nil, append(DefaultKeywords, "sha1"))
new, err := Walk(".", nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -59,7 +59,7 @@ func TestCompareModified(t *testing.T) {
}
// Walk the current state.
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -70,7 +70,7 @@ func TestCompareModified(t *testing.T) {
}
// Walk the new state.
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -140,7 +140,7 @@ func TestCompareMissing(t *testing.T) {
}
// Walk the current state.
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -159,7 +159,7 @@ func TestCompareMissing(t *testing.T) {
}
// Walk the new state.
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -215,7 +215,7 @@ func TestCompareExtra(t *testing.T) {
defer os.RemoveAll(dir)
// Walk the current state.
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -237,7 +237,7 @@ func TestCompareExtra(t *testing.T) {
}
// Walk the new state.
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -309,7 +309,7 @@ func TestCompareKeys(t *testing.T) {
}
// Walk the current state.
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -320,7 +320,7 @@ func TestCompareKeys(t *testing.T) {
}
// Walk the new state.
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
new, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}
@ -382,7 +382,7 @@ func TestTarCompare(t *testing.T) {
}
// Walk the current state.
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"))
old, err := Walk(dir, nil, append(DefaultKeywords, "sha1"), nil)
if err != nil {
t.Fatal(err)
}