[GH-ISSUE #52] mirror filesystem permissions #29

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opened 2026-03-01 21:39:14 +03:00 by kerem · 1 comment

kerem commented

2026-03-01 21:39:14 +03:00

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Originally created by @amn41 on GitHub (Mar 20, 2019).
Original GitHub issue: https://github.com/nektos/act/issues/52

firstly, thanks for this amazing tool! absolutely love it and it's making my iteration speed so much faster.

I have an action which runs fine locally using act, but fails when executed by github due to (it seems) a file permission error.

My dockerfile is very simple:

FROM alekzonder/puppeteer
ADD puppeteer-config.json /app
RUN npm install mermaid.cli
ENTRYPOINT ["/app/node_modules/.bin/mmdc", "-p", "/app/puppeteer-config.json"]
CMD ["--help"]

my action looks like this:

action "mermaid" {
uses = "./action-mermaid"
args = "-i gantt.mmd -o gantt-tmp.png -w 1884 -H 450"
}

this runs absolutely fine if I do act mermaid, but on github I get an error writing to the file:

Error: EACCES: permission denied, open 'gantt-tmp.png'

However, I've created a ticket with GitHub support since this may just be a bug on their end. The same issue exists if I direct the output to an absolute path like /github/home/gantt-tmp.png, /github/workspace/gantt-tmp.png , and it doens't matter whether the output file exists or not.

Originally created by @amn41 on GitHub (Mar 20, 2019). Original GitHub issue: https://github.com/nektos/act/issues/52 firstly, thanks for this amazing tool! absolutely love it and it's making my iteration speed so much faster. I have an action which runs fine locally using `act`, but fails when executed by github due to (it seems) a file permission error. My dockerfile is very simple: ``` FROM alekzonder/puppeteer ADD puppeteer-config.json /app RUN npm install mermaid.cli ENTRYPOINT ["/app/node_modules/.bin/mmdc", "-p", "/app/puppeteer-config.json"] CMD ["--help"] ``` my action looks like this: ``` action "mermaid" { uses = "./action-mermaid" args = "-i gantt.mmd -o gantt-tmp.png -w 1884 -H 450" } ``` this runs absolutely fine if I do `act mermaid`, but on github I get an error writing to the file: `Error: EACCES: permission denied, open 'gantt-tmp.png'` However, I've created a ticket with GitHub support since this may just be a bug on their end. The same issue exists if I direct the output to an absolute path like `/github/home/gantt-tmp.png`, `/github/workspace/gantt-tmp.png` , and it doens't matter whether the output file exists or not.