Bring back tini-static! 🎉

This allows the use of `tini` within even more minimal environments (such as images that are `FROM scratch` with a single application binary `COPY`'d in).

CMakeLists.txt

@@ -36,8 +36,12 @@ include_directories ("${PROJECT_BINARY_DIR}")
 
 add_executable (tini src/tini.c)
 
+add_executable (tini-static src/tini.c)
+set_target_properties (tini-static PROPERTIES LINK_FLAGS "-Wl,--no-export-dynamic -static")
+
 # Installation
 install (TARGETS tini DESTINATION bin)
+install (TARGETS tini-static DESTINATION bin)
 
 # Packaging
 include (InstallRequiredSystemLibraries)

README.md

@@ -63,11 +63,22 @@ Assuming your entrypoint was `/docker-entrypoint.sh`, then you would use:
     ENTRYPOINT ["/tini", "--", "/docker-entrypoint.sh"]
 
 
+### Statically-Linked Version ###
+
+Tini has very few dependencies (it only depends on libc), but if your
+container fails to start, you might want to consider using the statically-built
+version instead:
+
+    ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static /tini
+
+
 ### Size Considerations ###
 
 Tini is a very small file (in the 10KB range), so it doesn't add much weight
 to your container.
 
+The statically-linked version is bigger, but still < 1M.
+
 
 ### Building Tini ###
 

ci/run_build.sh

@@ -22,26 +22,27 @@ make package
 popd
 
 # Smoke tests (actual tests need Docker to run; they don't run within the CI environment)
-tini="${BUILD_DIR}/tini"
-echo "Testing $tini with: true"
-$tini -vvvv true
+for tini in "${BUILD_DIR}/tini" "${BUILD_DIR}/tini-static"; do
+  echo "Testing $tini with: true"
+  $tini -vvvv true
 
-echo "Testing $tini with: false"
-if $tini -vvvv false; then
+  echo "Testing $tini with: false"
+  if $tini -vvvv false; then
     exit 1
-fi
+  fi
 
-# Place files
-mkdir -p "${DIST_DIR}"
-cp "${BUILD_DIR}"/tini{,*.rpm,*deb} "${DIST_DIR}"
+  # Move files to the dist dir for testing
+  mkdir -p "${DIST_DIR}"
+  cp "${BUILD_DIR}"/tini{,-static,*.rpm,*deb} "${DIST_DIR}"
 
-# Quick audit
-if which rpm; then
+  # Quick audit
+  if which rpm; then
     echo "Contents for RPM:"
     rpm -qlp "${DIST_DIR}/tini"*.rpm
-fi
+  fi
 
-if which dpkg; then
+  if which dpkg; then
     echo "Contents for DEB:"
     dpkg --contents "${DIST_DIR}/tini"*deb
-fi
+  fi
+done

test/test.py

@@ -73,7 +73,7 @@ if __name__ == "__main__":
 
 
     # Funtional tests
-    for entrypoint in ["/tini/dist/tini"]:
+    for entrypoint in ["/tini/dist/tini", "/tini/dist/tini-static"]:
         functional_base_cmd = base_cmd + [
             "--entrypoint={0}".format(entrypoint),
             img,

tpl/README.md.in

@@ -63,11 +63,22 @@ Assuming your entrypoint was `/docker-entrypoint.sh`, then you would use:
     ENTRYPOINT ["/tini", "--", "/docker-entrypoint.sh"]
 
 
+### Statically-Linked Version ###
+
+Tini has very few dependencies (it only depends on libc), but if your
+container fails to start, you might want to consider using the statically-built
+version instead:
+
+    ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static /tini
+
+
 ### Size Considerations ###
 
 Tini is a very small file (in the 10KB range), so it doesn't add much weight
 to your container.
 
+The statically-linked version is bigger, but still < 1M.
+
 
 ### Building Tini ###
 

tpl/travis.yml.tpl

@@ -29,6 +29,7 @@ deploy:
     secure: Yk90ANpSPv1iJy8QDXCPwfaSmEr/WIJ3bzhQ6X8JvZjfrwTosbh0HrUzQyeac3nyvNwj7YJRssolOFc21IBKPpCFTZqYxSkuLPU6ysG4HGHgN6YJhOMm4mG4KKJ6741q3DJendhZpalBhCEi+NcZK/PCSD97Vl4OqRjBUged0fs=
   file:
     - "./dist/tini"
+    - "./dist/tini-static"
     - "./dist/tini_@tini_VERSION_MAJOR@.@tini_VERSION_MINOR@.@tini_VERSION_PATCH@.deb"
     - "./dist/tini_@tini_VERSION_MAJOR@.@tini_VERSION_MINOR@.@tini_VERSION_PATCH@.rpm"
   on: