[PF9-kunal]

Problem

Builds on the default branch fail immediately:

/bin/sh: default: No such file or directory
Exit code 2 (Step: Build and push ... container)

Seen in build #15.

Cause

TeamCity sets TEAMCITY_BUILD_BRANCH to the literal string <default> when a build runs on the VCS root's default branch. Makefile.pf9 passed that straight through unquoted:

--build-arg BRANCH=$(BRANCH) \

which expands to:

docker build ... --build-arg BRANCH=<default> ...

The shell reads < and > as redirection operators, tries to open a file named default for input, and aborts before docker build ever runs.

Builds on private/* branches were unaffected, because those branch names contain no shell metacharacters — which is why this only surfaced once the default branch was built.

Fix

Quote the two args whose values are not guaranteed to be simple tokens:

--build-arg BRANCH='$(BRANCH)' \
--build-arg APP_METADATA='$(APP_METADATA)' \

APP_METADATA is included for the same reason — it carries JSON, whose braces, spaces and quotes break identically once it is non-empty.

The remaining args (GO_VERSION, GOOS, GOARCH, CGO_ENABLED, VERSION, BUILD_ID) are left alone; their values are always simple tokens.

Verification

Reproduced and confirmed fixed locally by simulating the exact TeamCity value:

$ TEAMCITY_BUILD_BRANCH='<default>' PF9_VERSION=2026.12.0 BUILD_NUMBER=16 \
    make -f Makefile.pf9 -n build

        --build-arg BRANCH='<default>' \
        --build-arg APP_METADATA='' \

The generated command now parses cleanly instead of aborting the step.

🤖 Generated with Claude Code