Triggering Freestyle project with parameters from Slash Command in Slack

Hello,

I’m trying to trigger a parameterized Freestyle project build from slack via a Slash Command.

The Slash Command is /paramtest and configured as a POST with the URL: https://JENKINS_USER:API_TOKEN@myjenkinsurl.com/job/ParamTest/buildWithParameters?token=TOKEN_FROM_JENKINS_BUILD_TRIGGER

The Freestyle project is set up as a Parameterized build with a string parameter called ActiveProject.

In slack I can successfully trigger the build with: /paramtest ActiveProject=test param2_for_fun

The build runs, but I can’t figure out how to get to the parameters passed in.

I found some info on the web that there would be a %text% environment variable with this, or that the ActiveProject variable would be set to what was specified in the URL, but it is always the default.

I just can’t figure out how to get access to those parameters, and I can’t find any other info online or in the documentation.

Any info is very much appreciated.

Thanks!

Jenkins setup:
Jenkins: 2.401.3
OS: Windows 10 - 10.0
Java: 11.0.15 - Microsoft (OpenJDK 64-Bit Server VM)

ant:497.v94e7d9fffa_b_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-150.v7a_b_9d17134a_5
bootstrap5-api:5.3.0-1
bouncycastle-api:2.29
branch-api:2.1122.v09cb_8ea_8a_724
build-timeout:1.31
build-timestamp:1.0.3
build-token-root:151.va_e52fe3215fc
caffeine-api:3.1.6-115.vb_8b_b_328e59d8
checks-api:2.0.0
cloudbees-folder:6.815.v0dd5a_cb_40e0e
command-launcher:106.vb_a_b_8f751309c
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.10.0-68.v0d0b_c439292b_
credentials:1271.v54b_1c2c6388a_
credentials-binding:631.v861c06d062b_4
dark-theme:336.v02165cd8c2ee
data-tables-api:1.13.5-1
display-url-api:2.3.8
dotnet-sdk:1.4.0
durable-task:513.vc48a_a_075a_d93
echarts-api:5.4.0-5
email-ext:2.100
envinject:2.908.v66a_774b_31d93
envinject-api:1.199.v3ce31253ed13
external-monitor-job:207.v98a_a_37a_85525
file-operations:131.v32b_e7824fe95
font-awesome-api:6.4.0-2
git:5.2.0
git-client:4.4.0
git-server:99.va_0826a_b_cdfa_d
github:1.37.2
github-api:1.314-431.v78d72a_3fe4c3
github-branch-source:1732.v3f1889a_c475b_
gradle:2.8.2
instance-identity:173.va_37c494ec4e5
ionicons-api:56.v1b_1c8c49374e
jackson2-api:2.15.2-350.v0c2f3f8fc595
jakarta-activation-api:2.0.1-3
jakarta-mail-api:2.0.1-3
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.8-1
jdk-tool:73.vddf737284550
jjwt-api:0.11.5-77.v646c772fddb_0
jnr-posix-api:3.1.17-1
jquery3-api:3.7.0-1
jsch:0.2.8-65.v052c39de79b_2
junit:1217.v4297208a_a_b_ce
ldap:682.v7b_544c9d1512
lockable-resources:1185.v0c528656ce04
mailer:463.vedf8358e006b_
mapdb-api:1.0.9-28.vf251ce40855d
matrix-auth:3.1.10
matrix-project:802.v8013b_40c7edc
mina-sshd-api-common:2.10.0-69.v28e3e36d18eb_
mina-sshd-api-core:2.10.0-69.v28e3e36d18eb_
okhttp-api:4.11.0-157.v6852a_a_fa_ec11
pam-auth:1.10
pipeline-build-step:505.v5f0844d8d126
pipeline-github-lib:42.v0739460cda_c4
pipeline-graph-analysis:202.va_d268e64deb_3
pipeline-groovy-lib:671.v07c339c842e8
pipeline-input-step:477.v339683a_8d55e
pipeline-milestone-step:111.v449306f708b_7
pipeline-model-api:2.2144.v077a_d1928a_40
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pipeline-stage-view:2.33
plain-credentials:143.v1b_df8b_d3b_e48
plugin-util-api:3.3.0
postbuildscript:3.2.0-460.va_fda_0fa_26720
powershell:2.0
preSCMbuildstep:71.v1f2990a_37e27
publish-over:0.22
publish-over-dropbox:1.3.2
publish-over-ftp:1.17
resource-disposer:0.23
scm-api:676.v886669a_199a_a_
script-security:1264.vecf66020eb_7d
slack:664.vc9a_90f8b_c24a_
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sshd:3.312.v1c601b_c83b_0e
structs:324.va_f5d6774f3a_d
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theme-manager:193.vcef22f6c5f2b_
thinBackup:1.18
timestamper:1.26
token-macro:359.vb_cde11682e0c
trilead-api:2.84.v72119de229b_7
unity3d-plugin:1.3
variant:59.vf075fe829ccb
workflow-aggregator:596.v8c21c963d92d
workflow-api:1251.vd4889a_b_0a_065
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workflow-cps:3731.ve4b_5b_857b_a_d3
workflow-durable-task-step:1278.v94b_dc2b_50c6f
workflow-job:1316.vd2290d3341a_f
workflow-multibranch:756.v891d88f2cd46
workflow-scm-step:415.v434365564324
workflow-step-api:639.v6eca_cd8c04a_a_
workflow-support:848.v5a_383b_d14921
ws-cleanup:0.45

If no one has thoughts on this direct case, a more general question: I’m wondering how much anyone uses triggering with Slash Commands at all - either for a Freestyle project or Pipeline?

Is there perhaps an alternative to triggering parameterized builds from Slack? I thought this would be a common use case, but perhaps not?

Thanks!