Massively improve Makefile performance

Instead of running all the commands all the time, we conditionally
define rules based on the dev's machine and the files that need to
be committed.

.githooks/pre-commit

@@ -1,35 +1,4 @@
 #!/usr/bin/env bash
 
-set -e                          # grep failure does not trigger exit.
+make check_format
 
-dry=0                           # Set to 1 to enable dry run.
-
-function check_rs() {
-    if (( dry == 0 )); then
-        make check_rust_format
-    else
-        echo "check_rs ran"
-    fi
-}
-
-function check_ts() {
-    if (( dry == 0 )); then
-        make check_ts_format
-    else
-        echo "check_ts ran"
-    fi
-}
-
-function check_cargo_toml() {
-    if (( dry == 0 )); then
-        make check_toml_format
-    else
-        echo "check_cargo_toml ran"
-    fi
-}
-
-git status --untracked-files=no --short | grep -E '.rs$' > /dev/null 2>&1 && check_rs
-git status --untracked-files=no --short | grep -E '.ts$|.json$|.yml$' > /dev/null 2>&1 && check_ts
-git status --untracked-files=no --short | grep -E '.toml$' > /dev/null 2>&1 && check_cargo_toml
-
-exit 0

Makefile

@@ -3,36 +3,48 @@ RUSTUP = rustup
 TOOLCHAIN = $(shell cat rust-toolchain)
 CARGO = $(RUSTUP) run --install $(TOOLCHAIN) cargo --color always
 
-NIGHTLY_TOOLCHAIN = "nightly-2019-07-31"
+NIGHTLY_TOOLCHAIN = nightly-2019-07-31
 CARGO_NIGHTLY = $(RUSTUP) run --install $(NIGHTLY_TOOLCHAIN) cargo --color always
 
 GIT_HOOKS_PATH = ".githooks"
 GIT_HOOKS = $(wildcard $(GIT_HOOKS_PATH)/*)
 
+INSTALLED_TOOLCHAINS = $(shell $(RUSTUP) toolchain list)
+INSTALLED_COMPONENTS = $(shell $(RUSTUP) component list --installed --toolchain $(TOOLCHAIN))
+INSTALLED_NIGHTLY_COMPONENTS = $(shell $(RUSTUP) component list --installed --toolchain $(NIGHTLY_TOOLCHAIN))
+AVAILABLE_CARGO_COMMANDS = $(shell $(CARGO) --list)
+
 default: init_git_hooks build format
 
-init_git_hooks: $(GIT_HOOKS)
+init_git_hooks:
 	git config core.hooksPath $(GIT_HOOKS_PATH)
 
+## Dev environment
+
 install_rust:
-	$(RUSTUP) toolchain list | grep -q $(TOOLCHAIN) || $(RUSTUP) install $(TOOLCHAIN)
+ifeq (,$(findstring $(TOOLCHAIN),$(INSTALLED_TOOLCHAINS)))
+	$(RUSTUP) install $(TOOLCHAIN)
+endif
 
 install_rust_nightly:
-	$(RUSTUP) toolchain list | grep -q $(NIGHTLY_TOOLCHAIN) || $(RUSTUP) install $(NIGHTLY_TOOLCHAIN)
-
-## Dev environment
+ifeq (,$(findstring $(NIGHTLY_TOOLCHAIN),$(INSTALLED_TOOLCHAINS)))
+	$(RUSTUP) install $(NIGHTLY_TOOLCHAIN)
+endif
 
 install_clippy: install_rust
-	$(RUSTUP) component list --installed --toolchain $(TOOLCHAIN) | grep -q clippy || $(RUSTUP) component add clippy --toolchain $(TOOLCHAIN)
+ifeq (,$(findstring clippy,$(INSTALLED_COMPONENTS)))
+	$(RUSTUP) component add clippy --toolchain $(TOOLCHAIN)
+endif
 
 install_rustfmt: install_rust_nightly
-	$(RUSTUP) component list --installed --toolchain $(NIGHTLY_TOOLCHAIN) | grep -q rustfmt || $(RUSTUP) component add rustfmt --toolchain $(NIGHTLY_TOOLCHAIN)
+ifeq (,$(findstring rustfmt,$(INSTALLED_NIGHTLY_COMPONENTS)))
+	$(RUSTUP) component add rustfmt --toolchain $(NIGHTLY_TOOLCHAIN)
+endif
 
 install_tomlfmt: install_rust
-	$(CARGO) --list | grep -q tomlfmt || $(CARGO) install cargo-tomlfmt
-
-yarn_install:
-	(cd ./api_tests; yarn install)
+ifeq (,$(findstring tomlfmt,$(AVAILABLE_CARGO_COMMANDS)))
+	$(CARGO) install cargo-tomlfmt
+endif
 
 ## User install
 
@@ -46,13 +58,6 @@ clean:
 
 all: format build clippy test doc e2e_scripts
 
-format: install_rustfmt install_tomlfmt yarn_install
-	$(CARGO_NIGHTLY) fmt
-	$(CARGO) tomlfmt -p Cargo.toml
-	$(CARGO) tomlfmt -p cnd/Cargo.toml
-	$(CARGO) tomlfmt -p libp2p-comit/Cargo.toml
-	(cd ./api_tests; yarn run fix)
-
 ci: check_format doc clippy test build e2e
 
 build:
@@ -77,16 +82,42 @@ test:
 doc:
 	$(CARGO) doc
 
+e2e: build
+	(cd ./api_tests; yarn install; yarn test)
+
 check_format: check_rust_format check_toml_format check_ts_format
 
+STAGED_FILES = $(shell git diff --staged --name-only)
+STAGED_RUST_FILES = $(filter %.rs,$(STAGED_FILES))
+STAGED_TOML_FILES = $(filter %.toml,$(STAGED_FILES))
+STAGED_TYPESCRIPT_FILES = $(filter %.ts %.json %.yml,$(STAGED_FILES))
+
+format: install_rustfmt install_tomlfmt
+ifneq (,$(STAGED_RUST_FILES))
+	$(CARGO_NIGHTLY) fmt
+endif
+ifneq (,$(STAGED_TOML_FILES))
+	$(CARGO) tomlfmt -p Cargo.toml
+	$(CARGO) tomlfmt -p cnd/Cargo.toml
+	$(CARGO) tomlfmt -p libp2p-comit/Cargo.toml
+endif
+ifneq (,$(STAGED_TYPESCRIPT_FILES))
+	(cd ./api_tests; yarn install; yarn run fix)
+endif
+
 check_rust_format: install_rustfmt
+ifneq (,$(STAGED_RUST_FILES))
 	$(CARGO_NIGHTLY) fmt -- --check
+endif
 
 check_toml_format: install_tomlfmt
+ifneq (,$(STAGED_TOML_FILES))
 	$(CARGO) tomlfmt -d -p Cargo.toml
-
-check_ts_format: yarn_install
-	(cd ./api_tests; yarn run check)
-
-e2e: yarn_install
-	(cd ./api_tests; yarn test)
+	$(CARGO) tomlfmt -d -p cnd/Cargo.toml
+	$(CARGO) tomlfmt -d -p libp2p-comit/Cargo.toml
+endif
+
+check_ts_format:
+ifneq (,$(STAGED_TYPESCRIPT_FILES))
+	(cd ./api_tests; yarn install; yarn run check)
+endif