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Revert "Fix issue with "$$" in Script blocks" #3942

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Merged
merged 1 commit into from
May 12, 2021
Merged

Revert "Fix issue with "$$" in Script blocks" #3942

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19 changes: 0 additions & 19 deletions examples/v1alpha1/taskruns/step-script.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -97,22 +97,3 @@ spec:
[[ $# == 2 ]]
[[ $1 == "hello" ]]
[[ $2 == "world" ]]

# Test that multiple dollar signs next to each other are not replaced by Kubernetes
- name: dollar-signs-allowed
image: python
script: |
#!/usr/bin/env python3
if '$' != '\u0024':
print('single dollar signs ($) are not passed through as expected :(')
exit(1)
if '$$' != '\u0024\u0024':
print('double dollar signs ($$) are not passed through as expected :(')
exit(2)
if '$$$' != '\u0024\u0024\u0024':
print('three dollar signs ($$$) are not passed through as expected :(')
exit(3)
if '$$$$' != '\u0024\u0024\u0024\u0024':
print('four dollar signs ($$$$) are not passed through as expected :(')
exit(3)
print('dollar signs appear to be handled correctly! :)')
19 changes: 0 additions & 19 deletions examples/v1beta1/taskruns/step-script.yaml
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Expand Up @@ -96,22 +96,3 @@ spec:
[[ $# == 2 ]]
[[ $1 == "hello" ]]
[[ $2 == "world" ]]

# Test that multiple dollar signs next to each other are not replaced by Kubernetes
- name: dollar-signs-allowed
image: python
script: |
#!/usr/bin/env python3
if '$' != '\u0024':
print('single dollar signs ($) are not passed through as expected :(')
exit(1)
if '$$' != '\u0024\u0024':
print('double dollar signs ($$) are not passed through as expected :(')
exit(2)
if '$$$' != '\u0024\u0024\u0024':
print('three dollar signs ($$$) are not passed through as expected :(')
exit(3)
if '$$$$' != '\u0024\u0024\u0024\u0024':
print('four dollar signs ($$$$) are not passed through as expected :(')
exit(3)
print('dollar signs appear to be handled correctly! :)')
61 changes: 0 additions & 61 deletions pkg/pod/pod_test.go
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Expand Up @@ -889,67 +889,6 @@ script-heredoc-randomly-generated-78c5n
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{Medium: corev1.StorageMediumMemory}},
}),
},
}, {
desc: "step with script that uses two dollar signs",
ts: v1beta1.TaskSpec{
Steps: []v1beta1.Step{{
Container: corev1.Container{
Name: "one",
Image: "image",
},
Script: "#!/bin/sh\n$$",
}},
},
want: &corev1.PodSpec{
RestartPolicy: corev1.RestartPolicyNever,
InitContainers: []corev1.Container{
{
Name: "place-scripts",
Image: images.ShellImage,
Command: []string{"sh"},
Args: []string{"-c", `tmpfile="/tekton/scripts/script-0-9l9zj"
touch ${tmpfile} && chmod +x ${tmpfile}
cat > ${tmpfile} << 'script-heredoc-randomly-generated-mz4c7'
#!/bin/sh
$$$$
script-heredoc-randomly-generated-mz4c7
`},
VolumeMounts: []corev1.VolumeMount{scriptsVolumeMount},
},
{
Name: "place-tools",
Image: images.EntrypointImage,
Command: []string{"/ko-app/entrypoint", "cp", "/ko-app/entrypoint", "/tekton/tools/entrypoint"},
VolumeMounts: []corev1.VolumeMount{toolsMount},
}},
Containers: []corev1.Container{{
Name: "step-one",
Image: "image",
Command: []string{"/tekton/tools/entrypoint"},
Args: []string{
"-wait_file",
"/tekton/downward/ready",
"-wait_file_content",
"-post_file",
"/tekton/tools/0",
"-termination_path",
"/tekton/termination",
"-entrypoint",
"/tekton/scripts/script-0-9l9zj",
"--",
},
VolumeMounts: append([]corev1.VolumeMount{scriptsVolumeMount, toolsMount, downwardMount, {
Name: "tekton-creds-init-home-0",
MountPath: "/tekton/creds",
}}, implicitVolumeMounts...),
Resources: corev1.ResourceRequirements{Requests: allZeroQty()},
TerminationMessagePath: "/tekton/termination",
}},
Volumes: append(implicitVolumes, scriptsVolume, toolsVolume, downwardVolume, corev1.Volume{
Name: "tekton-creds-init-home-0",
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{Medium: corev1.StorageMediumMemory}},
}),
},
}, {
desc: "using another scheduler",
ts: v1beta1.TaskSpec{
Expand Down
6 changes: 0 additions & 6 deletions pkg/pod/script.go
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Expand Up @@ -107,12 +107,6 @@ func convertListOfSteps(steps []v1beta1.Step, initContainer *corev1.Container, p
// non-nil init container.
*placeScripts = true

// Kubernetes replaces instances of "$$" with "$". So we double-up
// on these instances in our args and Kubernetes reduces them back down
// to the expected number of dollar signs. This is a workaround for
// https://github.com/kubernetes/kubernetes/issues/101137
script = strings.ReplaceAll(script, "$$", "$$$$")

// Append to the place-scripts script to place the
// script file in a known location in the scripts volume.
tmpFile := filepath.Join(scriptsDir, names.SimpleNameGenerator.RestrictLengthWithRandomSuffix(fmt.Sprintf("%s-%d", namePrefix, i)))
Expand Down